EBK STATISTICS FOR THE BEHAVIORAL SCIEN
EBK STATISTICS FOR THE BEHAVIORAL SCIEN
3rd Edition
ISBN: 9781506386249
Author: PRIVITERA
Publisher: VST
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Chapter 10.3, Problem 3.2LC

1.

To determine

Find whether the null hypothesis is retained or rejected for a test statistic of +2.100, degrees of freedom 10 using 0.05, level of significance for two-tailed test.

2.

To determine

Find whether the null hypothesis is retained or rejectedfor a test statistic of +2.100, degrees of freedom 30 using 0.05, level of significancefor one-tailed test.

3.

To determine

Find whether the null hypothesis is retained or rejectedfor a test statistic of +2.100, degrees of freedom 20 using 0.05, level of significance for two tailed test.

4.

To determine

Find whether the null hypothesis is retained or rejectedfor a test statistic of +2.100, degrees of freedom 40 using 0.05, level of significance.

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A statistical test of hypothesis produces the P-value P = 0.112.  Will the null hypothesis be rejected at the  0.10 level of significance?  Explain
A result is significant at the 0.01 level. Explain why it must also be significant at the 0.05 level. Why is it important to report the P-value or the test statistic when presenting the results of a hypothesis test?
You are a research assistant at a zoo.  The question of your study is "Has the proportion of baby zebras born in zoos decreased from 10%?".  Your supervisor asks that you run a hypothesis test using a significance level of 0.05.  From the study, you obtain a z-score of 0.788.  What type of z test is appropriate?  What is the ?      Right, one-tailed test.   = +1.645     Right, one-tailed test.   = -1.645      Left, one-tailed test.   = +1.645     Left, one-tailed test.   = -1.645      Two-tailed test.   = +1.645 and -1.645
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