Independent simple random samples are selected to test the difference between the means of two populations whose standard deviations are not known. We are unwilling to assume that the population variances are equal. The sample sizes are n, = 25 and n2 = 35. The correct distribution to use is the t distribution with degrees of freedom. O a. 35 O b. 58

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Independent simple random samples are selected to test the difference between the means of two populations whose standard deviations are not known. We
are unwilling to assume that the population variances are equal. The sample sizes are n, = 25 and n2 = 35. The correct distribution to use is the t distribution
with
degrees of freedom.
O a. 35
Ob.58
O c. The correct degrees of freedom cannot be calculated without being given the sample standard deviations.
O d. 25
O= Icon Key
W
DEC
etv
8.
O o o
Transcribed Image Text:1 Question 8 of 15 » cions Independent simple random samples are selected to test the difference between the means of two populations whose standard deviations are not known. We are unwilling to assume that the population variances are equal. The sample sizes are n, = 25 and n2 = 35. The correct distribution to use is the t distribution with degrees of freedom. O a. 35 Ob.58 O c. The correct degrees of freedom cannot be calculated without being given the sample standard deviations. O d. 25 O= Icon Key W DEC etv 8. O o o
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