Determine (a) the x2 test statistic, (b) the degrees of freedom, (c) the critical value using a = 0.05, and (d) test the hypothesis at the a = 0.05 level of significance. Outcome A B C D Observed 42 39 38 41 Expected 40 40 40 40
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Determine (a) the x2 test statistic, (b) the degrees of freedom, (c) the critical value using a = 0.05, and (d) test the hypothesis at the a = 0.05 level of significance.
|
Outcome
|
A
|
B
|
C
|
D
|
|
|---|---|---|---|---|---|
|
Observed
|
42
|
39
|
38
|
41
|
|
|
Expected
|
40
|
40
|
40
|
40
|
|
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- Test the given claim using the α=0.05 significance level and assuming that the populations are normally distributed. Claim: The treatment population and the placebo population have the same mean. Treatment group: n=7, x⎯⎯⎯=111, s=6.1. Placebo group: n=12, x⎯⎯⎯=104, s=5. (a) The test statistic is . (b) What are the degrees of freedom? df = (c) The negative critical value is . (d) The positive critical value isUsing the z table, find the critical value (or values) for alpha = 0.12 right-tailed test.Using the z table, find the critical value (or values) for an α = .09 two-tailed test.
- A random sample of 15 families representing three social classes has been observed for the frequency with which the parents administer physical punishment to the children over a period of a week. Are the differences significant? Use α = .05 and the five-step model to conduct your hypothesis test. Write a sentence or two interpreting your results. Working Class: 10,9,4,2,1 Middle Class: 11,10,5,2,0 Upper Class: 7,5,2,0,0Using the z table, find the critical value (or values) for an α = .024 left-tailed test.Use the t-distribution table to find the critical value(s) for the indicated alternative hypotheses, level of significance , and sample sizes n, and n,. Assume that the samples are independent, normal, and random. Answer parts (a) and (b). Ha: H1 # H2, a = 0.01, n, = 12, n2 = 10 (a) Find the critical value(s) assuming that the population variances are equal. 2.845, - 2.845 (Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as needed.) (b) Find the critical value(s) assuming that the population variances are not equal. (Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as needed.)
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- Test whether u, <µ2 at the a =0.05 level of significance for the sample data shown in the accompanying table. Assume that the populations are normally distributed. Click the icon to view the data table. Determine the null and alternative hypothesis for this test. O A. Ho:H1 = H2 Sample Data O B. Ho:H1Use hypothesis testing process. A random sample of n = 40 individuals is obtained from a population with a mean of μ = 724. A treatment is administered to each individual in the sample and, after treatment, is measured. The average score for the treated sample is M = 732 with SS = 872. Use a 2-tailed test with a critical value at .05.Find the critical value.Determine the critical values for a two-tailed test of a population mean at the α = 0.05 level of significance based on a sample size of n = 12.SEE MORE QUESTIONS