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# A psychologist claims that the mean age at which children startwalking is 10 months. Carol wanted to check if this claim is true.She took a random sample of 20 chil...

## Question

###### A psychologist claims that the mean age at which children startwalking is 10 months. Carol wanted to check if this claim is true.She took a random sample of 20 children and found that the mean ageat which these children started walking was 12 months. It is knownthat the ages at which all children start walking are approximatelynormally distributed with a standard deviation 1.2 months. Testthat the mean age at which all children start walking is differentfrom 10 months. What the is observed value

A psychologist claims that the mean age at which children start walking is 10 months. Carol wanted to check if this claim is true. She took a random sample of 20 children and found that the mean age at which these children started walking was 12 months. It is known that the ages at which all children start walking are approximately normally distributed with a standard deviation 1.2 months. Test that the mean age at which all children start walking is different from 10 months. What the is observed value of the test statistic? What is your decision regarding the null hypothesis? Use the significance level as 5%. * #### Similar Solved Questions

##### Sadia Gomez Paraz11/29/18 1.12 AMHomework: 5-2 MyStatLab: Module Five Problem Set Score: 0 of 5 pts 10 0f 14 (12 complete) 11.3.3caveHW Score: 72.24%, 46.96 of 85 ptsQuestion HelpAssuming that both populations are normally distrbuted , construct 90% confidence intorval about |l1 42. ([l1 ropresents the moan the experimenial group and [42 represents the mean of the control group )ExparimentalContrdlTho confidence intenva nas ower bound of and an upper bound (Use ascending ordor_ Round t0 two coci
Sadia Gomez Paraz 11/29/18 1.12 AM Homework: 5-2 MyStatLab: Module Five Problem Set Score: 0 of 5 pts 10 0f 14 (12 complete) 11.3.3 cave HW Score: 72.24%, 46.96 of 85 pts Question Help Assuming that both populations are normally distrbuted , construct 90% confidence intorval about |l1 42. ([l1 ropre...
##### QUESTION 32What is the product of the following reaction sequence? 1) MgBr 2) Hzo4-ethyl-4-pentanol 2-ethyl-2-pentanol 3-methyl-3-hexanol1-ethyl-1-methyl-1-butanol 4-methyl-4-hexanol
QUESTION 32 What is the product of the following reaction sequence? 1) MgBr 2) Hzo 4-ethyl-4-pentanol 2-ethyl-2-pentanol 3-methyl-3-hexanol 1-ethyl-1-methyl-1-butanol 4-methyl-4-hexanol...
##### 3x + 3y+0: = Solve for x using the equations: Ox - ly + 2: = 4 3x + Oy+1=-7The value of x is:Find the slope of the curve:_ Y= 2.2 xs 8x at x =4.Tl va u:" A!2"4" dx EId ; ' Ml U46Val4eThe slope of the curve is:
3x + 3y+0: = Solve for x using the equations: Ox - ly + 2: = 4 3x + Oy+1=-7 The value of x is: Find the slope of the curve:_ Y= 2.2 xs 8x at x =4. Tl va u:" A !2" 4" dx EId ; ' Ml U46Val4e The slope of the curve is:...
##### 18 How long will 6.0 as experienced by an ob- server moving at 0.9c last for someone at rest?19. How long will 1 min as experienced by an 0b- server moving at 0.99c last for someone at rest?
18 How long will 6.0 as experienced by an ob- server moving at 0.9c last for someone at rest? 19. How long will 1 min as experienced by an 0b- server moving at 0.99c last for someone at rest?...
##### Uarc What ACTUALLY happcned? Inokin tne How did yau EXPECT Yoar uncut lare explanation The discrepancy? (Zptl Whati pLausibleLomnarethe expected tesults â‚¬ J tncyHow did thc observed BcIl and Etoltl disest diflered potential teason Mhy? (ZpthBcll was icubated &t 50"C; while: EcoKI Vras incubaledat 37"C Mhy Was this recess Iry? whiaL mieht You pledid occur I yau Mcidentaly swltched the {ernpetatutes? (Zpt]
uarc What ACTUALLY happcned? Inokin tne How did yau EXPECT Yoar uncut lare explanation The discrepancy? (Zptl Whati pLausible Lomnare the expected tesults â‚¬ J tncy How did thc observed BcIl and Etoltl disest diflered potential teason Mhy? (Zpth Bcll was icubated &t 50"C; while: EcoKI ...
##### 2. The FDA requires that Crade A pasteurized milk have no more than 20,000 CFUs per ml bascd on this standard, what is the maximum number of of CFUs that are permissible in: 0.1 ml?0.01 ml?0.001 ml?
2. The FDA requires that Crade A pasteurized milk have no more than 20,000 CFUs per ml bascd on this standard, what is the maximum number of of CFUs that are permissible in: 0.1 ml? 0.01 ml? 0.001 ml?...
##### [10+12pts] Find (a) the Laplace transform of f(t) = sin(t) U(t _ 5) + tcos? (2t)]. (Here U(t _ 5) is the step function.b) inverse Laplace transform of G(s) (82 +4s + 5)(32 solve the following initial-value problem
[10+12pts] Find (a) the Laplace transform of f(t) = sin(t) U(t _ 5) + tcos? (2t)]. (Here U(t _ 5) is the step function. b) inverse Laplace transform of G(s) (82 +4s + 5)(32 solve the following initial-value problem...
##### 7ZFSQM } BeCP11 19 4 Pc13.53 R834 Tol ( BLWClnctron MoYc circular petn_clrcular path perpendicularmagnetlc ficld magnltude 250thc klnetic ercroytno clectron40=19 Find tnc spced Ihc electron and tha rudius or tnc(a) the speed the electron Me(D} the itnsthe Orcular path
7ZFSQM } BeCP11 19 4 Pc13. 53 R 834 Tol ( BLW Clnctron MoYc circular petn_ clrcular path perpendicular magnetlc ficld magnltude 250 thc klnetic ercroy tno clectron 40=19 Find tnc spced Ihc electron and tha rudius or tnc (a) the speed the electron Me (D} the itns the Orcular path...
##### Couple planning have three children: Assuming that having. boy and having:. girl are equally likely; and that the Bender one child has no influence on (or, independent of) the gender another 'hat; the probability that the couple wll nave exactly tWO girls?The "random experiment" In this case Is having three children; as odd as that may sound this context: The next and most Important step determine what all of the possible outcomes are; and list them (iLe list the sample space S)
couple planning have three children: Assuming that having. boy and having:. girl are equally likely; and that the Bender one child has no influence on (or, independent of) the gender another 'hat; the probability that the couple wll nave exactly tWO girls? The "random experiment" In t...
##### 4 Assumc that the probability thar & pcron Is killcd by coronavirus in & ycar IS_ indcpendently. 1/200 million). Assume that thc TR pepulation is |00 million (5 points for tach parts) Compute P(4 or more people will be killed by coronavinus nextyear} exactly. Appm ximate the probahility that lound in (4) Approximate the probubility that Iwo or more people are killed by corona irus within the first months of [c X( }et Llic: probability that in @kth 4ul next [0 vcurs exutthy 3 pevple we ki
4 Assumc that the probability thar & pcron Is killcd by coronavirus in & ycar IS_ indcpendently. 1/200 million). Assume that thc TR pepulation is |00 million (5 points for tach parts) Compute P(4 or more people will be killed by coronavinus nextyear} exactly. Appm ximate the probahility that...
##### Feet Above See36303o5-379537es 1935 1837 71939 1291 J 795 197 199 Jol 1986 41983 190 1 194 1990 1928 Zoo0Feet Above See381037e53785 1985 1987 1939 4 1933 1997 1953 2051 1938 7193 1932 19 1933 1978 ZooFeet Above See383 3875 3820 3315 4id 385537e51937 1939 133 I249 I
Feet Above See 3630 3o5- 3795 37es 1935 1837 71939 1291 J 795 197 199 Jol 1986 41983 190 1 194 1990 1928 Zoo0 Feet Above See 3810 37e5 3785 1985 1987 1939 4 1933 1997 1953 2051 1938 7193 1932 19 1933 1978 Zoo Feet Above See 383 3875 3820 3315 4id 3855 37e5 1937 1939 133 I2 49 I...
##### Graph each inequality.\$\$x-y<5\$\$
graph each inequality. \$\$ x-y<5 \$\$...
##### Question 2Find the length of the curve of x(t) = 30 y(t) = 612 + 1, for te [0,1].1229 61 68 6Question 3
Question 2 Find the length of the curve of x(t) = 30 y(t) = 612 + 1, for te [0,1]. 122 9 61 68 6 Question 3...
##### 1. The following values were obtained for the calibration of a 5-mL pipet: 5.05, 4.95, and 5.00 mL. Determine the uncertainty for these type of measurements:A. 0.05113 B. 0.1334 C. 0.2442 D. 0.5121
1. The following values were obtained for the calibration of a 5-mL pipet: 5.05, 4.95, and 5.00 mL. Determine the uncertainty for these type of measurements: A. 0.05113 B. 0.1334 C. 0.2442 D. 0.5121...
##### The resulting data is shown in the following table: StudentSkipsGPASue 0 4.0George 3 3.5Sally 5 2.8Joe 6 2.1John 8 1.5Ted 8 1.0Given the data presented for the six students in Exercise #6,determine the correlation between the number of skips per studentfor these six students. The correlation is:a. r = -0.967b. r = 0.967c. r = -0.697d. r = 0.697
The resulting data is shown in the following table: Student Skips GPA Sue 0 4.0 George 3 3.5 Sally 5 2.8 Joe 6 2.1 John 8 1.5 Ted 8 1.0 Given the data presented for the six students in Exercise #6, determine the correlation between the number of skips per student for these six students. The correlat...
##### Tlu uju% (un yuats) 0l 10 men and the r Svstolic bluod pressures (in mllimoters 0l morcury) are shown aachod Jula Iable will Eaet e eucottolamonat 0.914' Romovo thu dala eriiry Ior Ine man Who 49 Yoars OKl und nas sysialic Bbod pos,Uro 0t 103 millimelers = mercuty troni Ihu dat 5et-Apf Lab afalelon coellicient Doscrbo how IFrs ailecls [ne correlaton cootliciuni , Usu lechnolagyClick Inu icon Vew Ino dala se1Data TableWmamex correluton coancinigoing ttorri 0 914t0(Round lo tnroe decimnl pkuc
Tlu uju% (un yuats) 0l 10 men and the r Svstolic bluod pressures (in mllimoters 0l morcury) are shown aachod Jula Iable will Eaet e eucottolamonat 0.914' Romovo thu dala eriiry Ior Ine man Who 49 Yoars OKl und nas sysialic Bbod pos,Uro 0t 103 millimelers = mercuty troni Ihu dat 5et-Apf Lab afal...