Homework Answers
The cutoff z score on the null distribution is Zcrit = +1.35.
You could reject the null hypothesis if the sample z score was greater than Zcrit i.e. 1.35.
Therefore, you could reject the null hypothesis if the sample z score was 2.16. (Answer)
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QUESTION 1 Suppose the cutoff z score on the nuli distribution is Zcrit = +1.35. You...
For each give (a) the Z-Score cutoff (or cutoffs) on the comparison distribution at which the...
For each give (a) the Z-Score cutoff (or cutoffs) on the comparison distribution at which the Null Hypothesis should be rejected, (b) the Z-score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all Populations are normally distributed. Study-M-SD-Sample Score-P-Tails of Test A-100.0-10.0-80-.05-1(low prediction) B-100.0-20.0-80-.01-2 C-74.3-11.8-80-.01-2 D-76.9-1.2-80-.05-1(low prediction) E-88.1-12.7-80-.05-2
If the cutoff for a one-tailed z test is -1.65, choose which of the following z...
If the cutoff for a one-tailed z test is -1.65, choose which of the following z scores would cause you to reject the null hypothesis: a)-1.2 b)-3.5 c)-2.3 d)2.5 e)-1.96 f)1.5 g) 0
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value...
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
Hello! Please help me answer this question, thank you!! Student Before 2. Five sophomores were given...
Hello! Please help me answer this question, thank you!!
Student Before 2. Five sophomores were given an English achievement test before and after receiving instruction in basic grammar. Their scores are shown below. Using the .05 level, does the experimental memory improvement therapy make a difference? 88888 la. Identify the populations 1b. Restate the question as a research hypothesis and null hypothesis about the populations. 2. Determine the characteristics of the comparison distribution. 3. Determine the cutoff sample score on...
Let Liz-1 eforthe conditional distribution f PrivenX)--Pr(z-2 I. Solve for the conditional distribution of Z given X-x....
Let Liz-1 eforthe conditional distribution f PrivenX)--Pr(z-2 I. Solve for the conditional distribution of Z given X-x. ll. If X -4 what is your best guess for the value of Z? Why? III. If our Null Hypothesis is that X~N(2,4), construct a test statistic for testing this hypothesis vs. the Alternative Hypothesis that X N(4,8). IV. How would you calculate the p-value if X--4? Would you reject the Null Hypothesis? Why?
Let Liz-1 eforthe conditional distribution f PrivenX)--Pr(z-2 I. Solve...
1.You are performing a left-tailed z-test If α=.005α=.005, and your test statistic is z=−2.59, do you:...
1.You are performing a left-tailed z-test If α=.005α=.005, and your test statistic is z=−2.59, do you: Reject Null Hypothesis Fail to Reject Null Hypothesis You are performing a left-tailed z-test If α=.10, and your test statistic isz=-2.01, do you: Reject Null Hypothesis Fail to Reject Null Hypothesis You are performing a right-tailed t-test with a sample size of 15 If α=.01, and your test statistic is t=3.02t=3.02, do you: Reject Null Hypothesis Fail to Reject Null Hypothesis You are performing...
What minimum Z score does a student need to get to be ranked in the top 1% of her/his class? (Use the Z table) O ar...
What minimum Z score does a student need to get to be ranked in the top 1% of her/his class? (Use the Z table) O around 0.25 O around 2.33 O between 3.5 and 4.0 O around 1 Question 15 1 pts A sample was collected to test a hypothesis. What does it mean when the null hypothesis was rejected at alpha level of.01? O The probability was less than .01 that a sample like this could have been obained...
Question 17 Suppose the age distribution of the Canadian population and the age distribution of a...
Question 17 Suppose the age distribution of the Canadian population and the age distribution of a random sample of 450 residents in the Indian community of Red Lake are shown below Observed Number Percent of Canadian Age lyears) Under 5 7.4% 510 14 10.8% 151064 700% 65 and older in Red Lake Village 58 301 11 .8% 58 Use alpha-0.1 to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents...
In a hypothesis test, an extreme z-score value, like z=+3 or z=+4, then a. is probably...
In a hypothesis test, an extreme z-score value, like z=+3 or z=+4, then a. is probably in the critical region b. means that you should probably reject the null hypothesis
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
Hello! Please help me answer this question, thank you!!
Student Before 2. Five sophomores were given an English achievement test before and after receiving instruction in basic grammar. Their scores are shown below. Using the .05 level, does the experimental memory improvement therapy make a difference? 88888 la. Identify the populations 1b. Restate the question as a research hypothesis and null hypothesis about the populations. 2. Determine the characteristics of the comparison distribution. 3. Determine the cutoff sample score on...
Let Liz-1 eforthe conditional distribution f PrivenX)--Pr(z-2 I. Solve for the conditional distribution of Z given X-x. ll. If X -4 what is your best guess for the value of Z? Why? III. If our Null Hypothesis is that X~N(2,4), construct a test statistic for testing this hypothesis vs. the Alternative Hypothesis that X N(4,8). IV. How would you calculate the p-value if X--4? Would you reject the Null Hypothesis? Why?
Let Liz-1 eforthe conditional distribution f PrivenX)--Pr(z-2 I. Solve...
What minimum Z score does a student need to get to be ranked in the top 1% of her/his class? (Use the Z table) O around 0.25 O around 2.33 O between 3.5 and 4.0 O around 1 Question 15 1 pts A sample was collected to test a hypothesis. What does it mean when the null hypothesis was rejected at alpha level of.01? O The probability was less than .01 that a sample like this could have been obained...
Question 17 Suppose the age distribution of the Canadian population and the age distribution of a random sample of 450 residents in the Indian community of Red Lake are shown below Observed Number Percent of Canadian Age lyears) Under 5 7.4% 510 14 10.8% 151064 700% 65 and older in Red Lake Village 58 301 11 .8% 58 Use alpha-0.1 to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents...
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