# Listed below are the numbers of words spoken in a day

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Listed below are the numbers of words spoken in a day by each member of eight different randomly selected couples. Complete parts (a) and (b) below. Male 15,951 26,115 1416 7841 19,165 15,745 14,117 25,103 Female 24,202 13,844 18,752 17,432 13,063 17,180 16,849 18,508 a. Use a 0.01 significance level to test the claim that among couples, males speak fewer words in a day than females. H0: ud = 0 word(s), H1: ud < 0 word(s), t = -0.52 , P-value = 0.310 , Since the P-value is greater than the significance level, fail to reject the null hypothesis. There is not sufficient evidence to support the claim that males speak fewer words in a day than females. b. Construct the confidence interval that could be used for the hypothesis test described in part (a). What feature of the confidence interval leads to the same conclusion reached in part (a)? The confidence interval is -12,210 word(s) < ud < 8616 word(s). Since the confidence interval contains zero fail to reject the null hypothesis. X 10 8 13 9 11 14 6 4 12 7 5 Y 7.46 7.76 12.74 7.11 7.81 8.84 6.09 5.39 8.16 6.43 5.73 a. Construct a scatterplot. Choose the correct graph below.
0.258x. Find the best predicted value of y^ (attractiveness rating by female of male) for a date in which the attractiveness rating by the male of the female is x =7. Use a .10 significance level. The best predicted value of y^ when x = 7 is 6.1. The data show the chest size and weight of several bears. Find the regression equation, letting chest size be the independent (x) variable. Then find the best predicted weight of a bear with a chest size of 41 inches. Is the result close to the actual weight of 173 pounds? Use a significance level of 0.05.
STAT 211 Module 9 HW Quiz Final
Use the given degree of confidence and sample data to construct a confidence interval for the population mean u. Assume that the population has a normal distribution. A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with s = 17.6 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.
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