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 15,495 27,251 1357 7741 18,280 15,583 13,978...




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


15,495


27,251


1357


7741


18,280


15,583


13,978


25,901




Female


24,768


13,676


17,908


17,382


12,596


17,411


16,693


19,336








a. Use a
0.01
significance level to test the claim that among​ couples, males speak fewer words in a day than females.


In this​ example,
μd
is the mean value of the differences d for the population of all pairs of​ data, where each individual difference d is defined as the words spoken by the male minus words spoken by the female. What are the null and alternative hypotheses for the hypothesis​ test?




Identify the test statistic.



t=

​(Round to two decimal places as​ needed.)

Identify the​ P-value.



​P-value=

​(Round to three decimal places as​ needed.)

What is the conclusion based on the hypothesis​ test?


Since the​ P-value is
greater than


the significance​ level,

fails 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

​word(s)______<><>​word(s).


​(Round to the nearest integer as​ needed.)



Jun 09, 2022
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