You wish to test the claim that the mean GPA of night students
is than 2.5 at the 0.05 significance level.
Based on a sample of 45 people, the sample mean GPA was 2.47 with a
standard deviation of 0.05.
When finding the critical value and test statistic, which
distribution would we be using?
Solution :
Here sample standard deviation is given this is the left tailed t test .
When finding the critical value and test statistic, distribution would we use
T distribution (invT for critical value)
You wish to test the claim that the mean GPA of night students is than 2.5...
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Test the claim that the mean GPA of night students is smaller than the mean GPA of day students at the 0.05 significance level, The null and alternative hypothesis would he: HPxPD Ho: Un = yd H: PN PD HH:My CMD HUN MD Hai Py = PD HIPN Po H.Mn + My H.Py > Po H. x > Hp H.: 4n <H H.:Py + P The test is: right-tailed left-tailed two-tailed The sample consisted of 18 night students, with a...
Test the claim that the mean GPA of night students is smaller than 2.3 at the 0.025 significance level. Test the claim that the mean GPA of night students is smaller than 2.3 at the 0.025 significance level The null and alternative hypothesis would be: Ho:2 2.3 Ho:H 2.3 Ho: 2.3 Ho:p 2 0.575 Ho:p 0.575 Ho:p0.575 H1: μ < 2.3 H1: μメ2.3 H1ιμ > 2.3 Hi : p < 0.575 H1: pチ0.575 Hi :p > 0.575 The test is:...
Test the claim that the mean GPA of night students is significantly different than the mean GPA of day students at the 0.02 significance level. The null and alternative hypothesis would be: Ho: PN PD Ho: un up Ho:un = up Ho:PN = pd Ho: PN PD Ho: un μD H:PN + PD H: Un <Hp H: Un > Hp H:PN <PD H:PN > PD Hunt up O O The test is: right-tailed two-tailed left-tailed The sample consisted of 70...
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Test the claim that the mean GPA of night students is significantly different than 3.5 at the 0.05 significance level. The null and alternative hypothesis would be: H 0 : p = 0.875 H 1 : p ≠ 0.875 H 0 : p = 0.875 H 1 : p < 0.875 H 0 : p = 0.875 H 1 : p > 0.875 H 0 : μ = 3.5 H 1 : μ < 3.5 H 0 : μ =...
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You are testing the claim that the mean GPA of night students is different than the mean GPA of day students. You sample 40 night students, and the sample mean GPA is 2.96 with a standard deviation of 0.77 You sample 30 day students, and the sample mean GPA is 2.5 with a standard deviation of 0.62 Calculate the test statistic, rounded to 2 decimal places
You are testing the claim that the mean GPA of night students is less than the mean GPA of day students. You sample 60 night students, and the sample mean GPA is 2.12 with a standard deviation of 0.68 You sample 30 day students, and the sample mean GPA is 2.01 with a standard deviation of 0.39 Use the t-distribution to calculate the test statistic, rounded to 2 decimal places: