25 questions

For the following conjecture, determine what would the null and alternative hypotheses be.Conjecture: The average age of community college students is 24.6 years. a) µ=24.6b) µ?24.6c) 24.6″>µ>24.6d) µ=24.6e) µ<24.6f) µ=24.6The null hypothesis is [ Select ] ["a", "b", "c", "d", "e", "f"] The alternative hypothesis is [ Select ] ["b", "a", "c", "d", "e", "f"] Flag this QuestionQuestion 21 ptsFor the following conjecture, determine what would the null and alternative hypotheses be.Conjecture: The majority of college students have credit cards.a) p=0.5b) p?0.5c) 0.5">p>0.5d) p=0.5e) p<0.5f) p=0.5The null hypothesis is [ Select ] ["a", "b", "c", "d", "e", "f"] The alternative hypothesis is [ Select ] ["c", "a", "b", "d", "e", "f"] Flag this QuestionQuestion 31 ptsFor the following conjecture, determine what would the null and alternative hypotheses be.Conjecture: The average pulse of male marathon runners is less than 70 beats per minute.a) µ=70b) µ?70c) 70">µ>70d) µ=70e) µ<70f) µ=70The null hypothesis is [ Select ] ["a", "b", "c", "d", "e", "f"] The alternative hypothesis is [ Select ] ["e", "a", "b", "c", "d", "f"] Flag this QuestionQuestion 41 ptsFor the following conjecture, determine what would the null and alternative hypotheses be.Conjecture: The proportion of homes with extinguishers is 0.80.a) p=0.80b) p?0.80c) 0.80">p>0.80d) p=0.80e) p<0.80f) p=0.80The null hypothesis is [ Select ] ["a", "b", "c", "d", "e", "f"] The alternative hypothesis is [ Select ] ["b", "a", "c", "d", "e", "f"] Flag this QuestionQuestion 51 pts Find the critical value(s), assuming that the normal distribution applies.Two-tailed test, alpha = 0.01a) z=±2.57b) z=+2.57c) z=-2.57d) z=±2.05e) z=+2.05f) z=-2.57The critical value(s) is [ Select ] ["a", "b", "c", "d", "e", "f"] Flag this QuestionQuestion 61 ptsFind the critical value, assuming that the normal distribution applies.Right-tailed test, alpha = 0.02a) z=±2.57b) z=+2.57c) z=-2.57d) z=±2.05e) z=+2.05f) z=-2.57The critical value(s) is [ Select ] ["e", "a", "b", "c", "d", "f"] Flag this QuestionQuestion 71 ptsFind the critical value, assuming that the normal distribution applies.Alpha = 0.005 H1p<0.78a) z=±2.57b) z=+2.57c) z=-2.57d) z=±2.05e) z=+2.05f) z=-2.57The critical value(s) is [ Select ] ["c", "a", "b", "d", "e", "f", ""] Flag this QuestionQuestion 81 ptsThe critical region is defined by the critical values ±1.75. The value of the statistic is 1.8. Would you reject or fail to reject the hypothesis? [ Select ] ["Reject", "Fail to reject"] Flag this QuestionQuestion 91 ptsThe critical region is defined by the critical value -2.33. The test statistic value is -1.7. Would you reject or fail to reject the hypothesis? [ Select ] ["Reject", "Fail to reject"] Flag this QuestionQuestion 101 ptsIf H0p=0.2, H1p?0.2then the test we use for hypothesis testing is [ Select ] ["two-tailed test", "right-tailed test", "left-tailed test"] Flag this QuestionQuestion 111 ptsIf H0p=0.2, 0.2">H1p>0.2then the test we use for hypothesis testing is [ Select ] [“right-tailed test”, “left-tailed test”, “two-tailed test”] Flag this QuestionQuestion 121 ptsUse the given information to find the p-value: the test statistic is a left-tailed test and z=-1.25 (normal distribution).Round your answer to nearest thousandths.Flag this QuestionQuestion 131 ptsUse the given information to find the p-value: the test statistic is a two-tailed test and z=-2.75 (normal distribution).Round your answer to nearest thousandths.Flag this QuestionQuestion 141 ptsUse the given information to find the p-value: the test statistic is z=2.30 (normal distribution) and0.7″>H1p>0.7Round your answer to nearest thousandths.Flag this QuestionQuestion 151 ptsIf p-value is 0.001 and a=0.01 would you [decision]reject the null hypothesisfail to reject the null hypothesisFlag this QuestionQuestion 161 ptsIf p-value is 0.07 and a=0.01 would you [decision]fail to reject the null hypothesisreject the null hypothesisFlag this QuestionQuestion 171 ptsThe dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:40000″>H0µ=40000H1µ>40000Suppose that the true mean is $40000 and the dean rejects the null hypothesis. Is thisa) correct decisionb) Type I errorc) Type II errorbacFlag this QuestionQuestion 181 ptsThe dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:40000″>H0µ=40000H1µ>40000Suppose that the true mean is $50000 and the dean rejects the null hypothesis. Is thisa) correct decisionb) Type I errorc) Type II errorabcFlag this QuestionQuestion 191 ptsThe dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:40000″>H0µ=40000H1µ>40000Suppose that the true mean is $50000 and the dean does not reject the null hypothesis. Is thisa) correct decisionb) Type I errorc) Type II errorcabFlag this QuestionQuestion 201 ptsA test of hypotheses H0µ=15 versus H1µ?15 was performed. The p-value was 0.027. Fill in the blank: If µ=15, then the probability of observing a test statistic as extreme as or more extreme than actually observed is Flag this QuestionQuestion 211 ptsA hypothesis test result in a p-value of 0.007. Which is the best conclusion?null hypothesis might be true but it is very unlikelynull hypothesis might be false but it is very unlikelynull hypothesis is plausibleNo answer text provided.No answer text provided.null hypothesis is definitely falsenull hypothesis is definitely trueFlag this QuestionQuestion 221 ptsWe never conclude that null hypothesis is true.TrueFalseFlag this QuestionQuestion 231 ptsWhen we reject a null hypothesis, we are certain that the alternative hypothesis is true.TrueFalseFlag this QuestionQuestion 241 ptsIf a null hypothesis is rejected with a significance level of 0.05, it is also rejected with a significance level of 0.01?TrueFalseit might be eitherFlag this QuestionQuestion 251 ptsIf a null hypothesis is rejected with a significance level of 0.01, it is also rejected with a significance level of 0.05?TrueFalseit might be either

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