4

Provide 3n appropriate responseThe data below are the number of absences and the final grades of randomly selected students from ? statistics class. Calculate the c...

Question

Provide 3n appropriate responseThe data below are the number of absences and the final grades of randomly selected students from ? statistics class. Calculate the correlation coefficient;Numberorab Grade#K-k#HH0 8990.8880.9180,991

Provide 3n appropriate response The data below are the number of absences and the final grades of randomly selected students from ? statistics class. Calculate the correlation coefficient; Numberorab Grade #K-k#HH 0 899 0.888 0.918 0,991



Answers

Absences and Final Grades An educator wants to see how the number of absences for a student in her class affects the student's final grade. The data obtained from a sample are shown. $$ \begin{array}{l|llllll}{\text { No. of absences } x} & {10} & {12} & {2} & {0} & {8} & {5} \\ \hline \text { Final grade y } & {70} & {65} & {96} & {94} & {75} & {82}\end{array} $$ $$ \begin{array}{l}{\text { For Exercises } 34 \text { and } 35, \text { do a complete regression analysis }} \\ {\text { and test the significance of } r \text { at } \alpha=0.05, \text { using the } P \text { -value }} \\ {\text { method. }}\end{array} $$

Yeah, that's probably going to find the mean variance and standard deviation. Yeah, starting with the mean, the mean is a song of all the X values times the probability of each of them. So here we want to go from X0. So so the zero Times .059, that's the probability of zero Plus one times .1-2. That's the probability of one Plus all the way up to seven, I was .53, that's the probability of something. So then it's just a matter of adding all these together. Uh huh. This just 3.349 when we do and so that is army. Now in order to find the variants. First thing we need to find is the expected by events squared. This is the sum as extras from 0 to 7 of that squared pivots And so similar to what we did above this is zero square in times 0.059. We just square all these terms first. Just one square times .1- two. All the way up to plus seven, spread Times .53. This is not a very answer is just something that we have to find in order to find the very and I'm gonna do this business that he have X squared The 17.5- two. The variance is the expected value of X squared minus the expected value of that square. We just found that he have X squared is 17.5 to 2. And above we found the expected value of X is 3.349. And so we'll take it. That's right. And so this gives us 6.306 when we evaluate this, so that's our parents. Yeah, our standard deviation, there's always the square root of parents Until I take the square root of 6.3 or six, That's for 6.306. This 2.511. So that's the standard deviation. Yeah. No, I mean, yeah. That's for the interpretation. The average number of extracurriculars. Just 3.349. Her student, Yeah. Which varies on average By 2.511 standard deviation.

Today we will be continuing our discussion with probability distributions by going over the example here on the screen, and we'll be constructing a probability distribution and trying the graph associate with that distribution in our example today is that the probability of student registers for 234 or five classes for a semester is 0.1 point 34.62 or 0.3 respectively. Once again, we'll start withdrawing our distribution, just the distribution table we've sin doing. For our last few examples, we have our random Earth River random variable X on our probabilities of each x value in our tables up here and our excess. Today our values are 234 or five and our probabilities again. Our 0.1 point 34 six to we're 0.3 And there's our probability illustration for this example. Next, we will be its again writing out a graph. And since the largest we'd go, Teoh is probability of 0.6 to will and do 0.7 for our, um, probability, or why access put seven 0.6 point 5.4 point three 0.2 and point once. So it's gonna be a little well squished a or six and soon close to our tub and then our excel result again are 234 and fine. Go on ahead and I have our national graphing portion, which first we have our 0.0 ones. That too. It's just kind of barely there things happen up for five. Value is also pretty close to zero. There are three. Value is 30.34 will come right about there on our four values. Point 62 will come just above our six and

The first step is to test ISI. Secrets did not occur. So we have information about number absences recorded from lecture That I am Money isn't there. So if you just go ahead and right out the know on Twitter hypothesis said no buses, that number of absences. Example. Random sequence with expect to properties above and below. So random secrets is that this set data from random sequence and respected two properties above. Okay. Now, for the alternate buses, it just be that sequences do not. Okay. Randi, you okay? No. To find the test statistic V from Richard, find median first using the main type software. Really find median busy. Cool, too. Median is 10.5. Okay. And now you can also find a test statistic V using again the cops are trained to find the is Hey, night. Okay, which is just a number of runs observed. No. Find the ample size for the critical values. So let's let anyone be the number above median. Jeanne. Okay? And it's that and to equal change, that's, uh, number below, uh, Leek. Good. So, no, we know that one into a routine on since our paths is is two killed. Teoh, This a level of significance of your put your five directed stabled The critical value intrasection column in Rome with the critical values are 8 20 So you can say that V s and Regal age or the school 2 20 Okay, okay. So now from the run test table thinking determined the P value so P value p it is greater than 0.5 And that's just for looking at the center from looking at sample sizes. Two statistic You can find this piece. So since the test statistic feet fall into critical region, we can include that sequence. Did not occur. Not occurred, Brenda. Okay. No, part B. We're going to the chairman if the room test is using a standard normal. So he is the number of runs observed. Just nine z star is a test statistic value, which we have to find on a church not on h. A are just the same random sequence. I'm not ready. Okay. So now to find the mean and standard deviation for funding the test statistics, so for you, V has he called to on one times and to over on one plus two plus one, which is equal to two times 13. I'm still chain over. They're cheap listed Jane plus one, which will give us a value for James. No approximation for the mean is 14 approximation for the I mean okay. Now find normal approximation percentage. Aviation is equal to square to and one times and to 21 times and to minus one minus and to so on. One plus two squared times and one person to it's fun is equal to 2.5. Just plugging in one step teen and to this Now you can finally find disease star it, which is statistic value. So that's equal to V. Are you see Reverse signal fee line for change over five to nick canoes to Jews. Okay, so from the minutes have up put, you can find P People deserve points year for five. Have the critical values for testing in the normal approximation table for two tails, your friends, your level significance is seeing not plus and minus on foot 96 Therefore, the critical value Z list Sanriku made of 1.96 or Z is greater, then positive 1.96 so to test statistic falls in the critical regions, so we can reject advances. So therefore there is sufficient evidence to indicate that sequenced, not her, Okay.


Similar Solved Questions

5 answers
Eukulatc udk kd 46t Lua t J3ia Extal} ILolou fx 4U %elsdert . Sut ~Audc Corr ~L 4 Rat 4l4 I Aa~ mtent 33 Jk CiCna 124444)5GUly) 18403) Lhmal 46 3Jlorzyy 16hCU) 39hlh+aqy) 211.2 kJ ChwptJllq) C9(jJ+ 1#ory Afa_ 3L3UJ 3Clilg) L - Lab skT 35-iim
Eukulatc udk kd 46t Lua t J3ia Extal} ILolou fx 4U %elsdert . Sut ~Audc Corr ~L 4 Rat 4l4 I Aa~ mtent 33 Jk CiCna 124444)5GUly) 18403) Lhmal 46 3Jlorzyy 16hCU) 39hlh+aqy) 211.2 kJ ChwptJllq) C9(jJ+ 1#ory Afa_ 3L3UJ 3Clilg) L - Lab skT 35-iim...
5 answers
6. If person C exerts a tension of 50 pounds on his rope, how much force must person B exert on her rope to keep the pole in equilibrium (no moment around A)? Describe in detail your solution processfeet545838 feet8
6. If person C exerts a tension of 50 pounds on his rope, how much force must person B exert on her rope to keep the pole in equilibrium (no moment around A)? Describe in detail your solution process feet 5 458 3 8 feet 8...
5 answers
Determine the divergence convergence Of the given improper integral, Evaluate the integral if it converges. (10 points)ax sin bx dx; a > 0
Determine the divergence convergence Of the given improper integral, Evaluate the integral if it converges. (10 points) ax sin bx dx; a > 0...
5 answers
Point)Evaluate the following indefinite integral:( 6 dz+C
point) Evaluate the following indefinite integral: ( 6 dz +C...
5 answers
1 Using of the CORSEQUENCE cancer iS cuirerlly 3 6 months LIKELY developing a treatment desined to larget & median survival time 0l 2 years. 1 salemanls for men with a diagnosis of Stage 4 prostatc of the followming elcisold ? IDcls 1 1 1 1 1 sunvival timie WI U survival time? 1 The mnedian taigeled Deciena Deciedse
1 Using of the CORSEQUENCE cancer iS cuirerlly 3 6 months LIKELY developing a treatment desined to larget & median survival time 0l 2 years. 1 salemanls for men with a diagnosis of Stage 4 prostatc of the followming elcisold ? IDcls 1 1 1 1 1 sunvival timie WI U survival time? 1 The mnedian taig...
5 answers
Chemist prepares solution of mercury(II) iodide 'Hglz) by measuring out 0.0107 umol of mercury(II) iodide into 200_ mL volumetric flask and filling the flask to the mark with water.Calculate the concentration in moVL of the chemist'$ mercury(II) iodide solution_ Be sure your answer has the correct number of significant digitsLxo
chemist prepares solution of mercury(II) iodide 'Hglz) by measuring out 0.0107 umol of mercury(II) iodide into 200_ mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in moVL of the chemist'$ mercury(II) iodide solution_ Be sure your answer has th...
5 answers
For the right triangle below, fInd the length of >. Round t0 the hundredths. (2 decimal places)Question Help: GWorked Example L
For the right triangle below, fInd the length of >. Round t0 the hundredths. (2 decimal places) Question Help: GWorked Example L...
5 answers
A solution is prepared by dissolving $0.250$ mole of $mathrm{Ba}(mathrm{OH})_{2}$ in enough water to get $4.00 mathrm{I}$. of solution. What are the $mathrm{OH}^{-}$ and $mathrm{H}_{3} mathrm{O}^{+}$ molar concentrations?
A solution is prepared by dissolving $0.250$ mole of $mathrm{Ba}(mathrm{OH})_{2}$ in enough water to get $4.00 mathrm{I}$. of solution. What are the $mathrm{OH}^{-}$ and $mathrm{H}_{3} mathrm{O}^{+}$ molar concentrations?...
5 answers
Reaction #1:CzHzlg) 2Hzlg) CzHslg)Weight of ethyne (CzHzl:5.0OgMoles of ethyne:Acalorimeter:+72.7kJAreaction:AHreaction per mole of CzHz Consumed:Reaction #2:CzHslg) 7/202(g) 2COz(g) 3HzOlg)Weight of ethane (CzHbl:4.02gMoles of ethane:Acalorimeter:+151.7kJAreaction:AHreaction per mole of ethane Consumed:Reaction #3:2Hz(g) Ozlg) => 2 HzOlg) AHreaction for 2Hzlg) Ozlg) => 2 HzOlg) per mole of HzO formed 286.kJ
Reaction #1: CzHzlg) 2Hzlg) CzHslg) Weight of ethyne (CzHzl: 5.0Og Moles of ethyne: Acalorimeter: +72.7kJ Areaction: AHreaction per mole of CzHz Consumed: Reaction #2: CzHslg) 7/202(g) 2COz(g) 3HzOlg) Weight of ethane (CzHbl: 4.02g Moles of ethane: Acalorimeter: +151.7kJ Areaction: AHreaction per mo...
5 answers
Given:73Question: Is vector W in the subspace spanned by vectors U4, Uz, U3 and U4? Show all steps of your solution Give explicit justification of the answer
Given: 73 Question: Is vector W in the subspace spanned by vectors U4, Uz, U3 and U4? Show all steps of your solution Give explicit justification of the answer...
5 answers
Suppose wC represent "Sam is Bill's father by FATHER(BILL, SAM) and 'Harry one of Bill' s ancestors' by ANCESTOR(BILL, HARRY) Write a wff to represent "Every ancestor of Bill is either his father; his mother, or one of their ancestors_
Suppose wC represent "Sam is Bill's father by FATHER(BILL, SAM) and 'Harry one of Bill' s ancestors' by ANCESTOR(BILL, HARRY) Write a wff to represent "Every ancestor of Bill is either his father; his mother, or one of their ancestors_...
1 answers
During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of $60.0 \mathrm{mm}$ Hg between the lungs and chest wall. What force in newtons does this pressure create on the $600 \mathrm{cm}^{2}$ surface area of the diaphragm?
During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of $60.0 \mathrm{mm}$ Hg between the lungs and chest wall. What force in newtons does this pressure create on the $600 \mathrm{cm}^{2}$ surface area of the diaphragm?...
1 answers
Use $s_{n}$ and integral bounds to find the smallest interval that you can be sure contains the sum $s$ of the series. If the midpoint $s_{n}^{*}$ of this interval is used to approximate $s,$ how large should $n$ be chosen to ensure that the error is less than $0.001 ?$ $$\sum_{k=1}^{\infty} \frac{1}{k^{2}+4}$$
Use $s_{n}$ and integral bounds to find the smallest interval that you can be sure contains the sum $s$ of the series. If the midpoint $s_{n}^{*}$ of this interval is used to approximate $s,$ how large should $n$ be chosen to ensure that the error is less than $0.001 ?$ $$\sum_{k=1}^{\infty} \frac{1...
1 answers
Quickly solve these square root problems. $\sqrt{4}$
Quickly solve these square root problems. $\sqrt{4}$...
5 answers
For the given figure, determine the magnitude anddirection of the resultant force by performing thefollowing: a) Apply parallelogram law to determine the magnitude ofthe resultant force. (3 Marks) b) Apply triangle rule todetermine the magnitude of the resultant force. (2 Marks) c)With the help of using the law of sines, determine the direction ofthe resultant force. (2 Marks)
For the given figure, determine the magnitude and direction of the resultant force by performing the following: a) Apply parallelogram law to determine the magnitude of the resultant force. (3 Marks) b) Apply triangle rule to determine the magnitude of the resultant force. (2 Marks) c) With the...
5 answers
Help!The fundamental frequency of vibration for lithium fluoride is914 cm−1.Calculate the force constant of the lithium-fluorine bond interms of N·m−1.
Help! The fundamental frequency of vibration for lithium fluoride is 914 cm−1. Calculate the force constant of the lithium-fluorine bond in terms of N·m−1....
5 answers
A block of unknown mass is attached spring of spring constant 9 N/m and under- gves simple harmonic motion with an ampli- tude of 4.1 cm When the mass is halfway between its equilibrium position and the end- point, its speed is measured to be 30.4 cm/s. Calculate the mass of the block_ Answer in units of kg:
A block of unknown mass is attached spring of spring constant 9 N/m and under- gves simple harmonic motion with an ampli- tude of 4.1 cm When the mass is halfway between its equilibrium position and the end- point, its speed is measured to be 30.4 cm/s. Calculate the mass of the block_ Answer in uni...
5 answers
(a) Show that the substitution y rv transforms the differential equationdy 2rdu + 2y (8r2+ 1) = 0 dz2 dxinto the differential equationd?v +16v = 0 dz(b) Find the general solution of the differential equation (*+)_(c) Hence, find the general solution of the differential equation (*)Given that y = 2r at € = % and y = T at x = 8(d) Find the particular solution of the differential equation (*)
(a) Show that the substitution y rv transforms the differential equation dy 2rdu + 2y (8r2+ 1) = 0 dz2 dx into the differential equation d?v +16v = 0 dz (b) Find the general solution of the differential equation (*+)_ (c) Hence, find the general solution of the differential equation (*) Given that y...

-- 0.020446--