Question list
O Question 1
K
Assume that you have a sample of nā = 7, with the sample mean Xā = 41, and a sample standard deviation of Sā = 5, and you have an independent sample of nā = 17 from another
population with a sample mean of X2 = 35 and the sample standard deviation S2 = 7. Complete parts (a) through (d) below.
a. What is the value of the pooled-variance tSTAT test statistic for testing Ho: Āµā = Āµā?
O Question 2
STAT=
(Round to two decimal places as needed.)
b. In finding the critical value, how many degrees of freedom are there?
O Question 3
degrees of freedom
(Simplify your answer.)
O Question 4
c. Using a significance level of a = 0.25, what is the critical value for a one-tail test of the hypothesis Ho: Āµā 5 Āµā against the alternative Hā: Āµā > Āµā?
The critical value is
(Round to two decimal places as needed.)
Question 5
d. What is your statistical decision?
OA. Reject Ho because the computed ISTAT test statistic is greater than the upper-tail critical value.
OB. Do not reject Ho because the computed tSTAT test statistic is less than the upper-tail critical value.
OC. Reject Ho because the computed ISTAT test statistic is less than the upper-tail critical value.
OD. Do not reject Ho because the computed tSTAT test statistic is greater than the upper-tail critical value.
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