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Ocuonly nominal variables whereas the others arc not:Question 32 (2.875 points) Whcn the valuc ofX? (chi-squarc) is zeroA) the null hypothesis should be rejectedB) ...

Question

Ocuonly nominal variables whereas the others arc not:Question 32 (2.875 points) Whcn the valuc ofX? (chi-squarc) is zeroA) the null hypothesis should be rejectedB) the obscrved frequency thc square root of the expected frequency:thc expected and observed frequencics ae equal,D) thc observed frequcncy is the squarc of the expected frcqucncy

ocu only nominal variables whereas the others arc not: Question 32 (2.875 points) Whcn the valuc ofX? (chi-squarc) is zero A) the null hypothesis should be rejected B) the obscrved frequency thc square root of the expected frequency: thc expected and observed frequencics ae equal, D) thc observed frequcncy is the squarc of the expected frcqucncy



Answers

Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Use the P-value method unless your instructor specifies otherwise. Use the normal distribution as an approximation to the binomial distribution, as described in Part 1 of this section. The company Drug Test Success provides a " 1-Panel-THC" test for marijuana usage. Among 300 tested subjects, results from 27 subjects were wrong (either a false positive or a false negative). Use a 0.05 significance level to test the claim that less than $10 \%$ of the test results are wrong. Does the test appear to be good for most purposes?

We have a hypothesis test with P values 0.083 for are observed data. We want to determine for each of the alphas or the significance values below whether or not our P value enables us to reject the null hypothesis each not before getting started. Let's remember a critical definition. You can reject the null hypothesis, H not whenever P is less than or equal to alpha. So whenever your P value is less than or equal to your significance level. Now implementing this in part A We have that 0.083 is greater than alpha equals 0.05. That means that P is greater than alpha. So for part a we do not reject the null hypothesis. For part B, alpha equals 0.1, 0.083 is less than or equal to 0.1. So in this case P is less than or equal to alpha. And we were able to reject the null hypothesis. Finally, for part C 0.083 is actually greater than the alpha value here of 0.06. So again P is greater than a, and once again we do not reject the null hypothesis.

Now in this case, I wonder if it's the claim. If my Pete is alright testing the claim that he is not equal to 0.345 now, since this is a not equal to sign, this is going to be a two tailed test A to tail best. Now, the C statistic that I have with me is 2.1 My zed is equal to 2.1 So I wanna find a two tailed p value. This is 2.1 So I'm just using a calculator for this 2.1 It's my decision to stick by significance level 0105 and this is two tailed hypothesis. So in this case, I get my P value of 0.44 My P value is 0.44 on my Alfa is zero point zero fight And since my P value is less than my Alfa, I will say that I have enough statistical evidence to reject mine al hypothesis. So I will reject. It's not

Now, in this question, my distant Asti is minus 2.5 Z value is minus 2.5 and I want to check for the claim that he is less than 0.75 p is less than 0.75 somewhere. Here, I have minus 2.5. Okay, this is going to be a left tail. As since this is a less than claim. This is going to be a left tail. A single tail on the left tail test. What is my Alfa my Alfa 0105? Okay, so let's try to find the P value for minus 2.5 for minus 2.5 minus 2.5. The P value that I'm getting 0.60 point 60.6 And my Alfa is 0.5 And as I can see that my P value is less than my Alfa. I say that I have enough statistical evidence to reject my null hypothesis. So I reject Mindulle hypothesis. H not

All right. In this case, we have been given that the set score is 1.0 and we're testing for the claim that he is greater than zero. Sorry is please greater than 0.3 if he is greater, which means that there's a single tail test and a right ale test. Right? We're going to shape for this region. Okay, ourselves statistic is 1.0 R Alfa level for this question is 0.5 And if I check the P value for that is equal to 1.0, I find that my P value is 0.158 Right? And since my people is greater than Alfa, I say that I do not have enough statistical evidence toe reject Mindulle hypothesis. This is not a significant. It is all right. Statistically significant result. And this would be my answer


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