Answer the following questions : For each of the following situations, determine:
a) the null and research hypotheses;
b) the hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, and 4, state whether the test is one-tailed or two-tailed;
c) the degrees of freedom
d) the critical value (cutoff score on the comparison distribution);
e) your sample’s test score;
f) your conclusion on whether to accept or reject the null hypothesis (you must show how the comparison of your cutoff score with your sample’s test score leads to your conclusion).
This is the problem:
4. An industrial/organizational psychologist is interested in determining whether adding 15-minute breaks increases worker productivity. She selects a sample of 20 participants and measures their productivity before and after introducing the 15-minute breaks. The test statistic was -3.15.
somebody help
a) the null and research hypotheses;
b) the hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, and 4, state whether the test is one-tailed or two-tailed;
c) the degrees of freedom
d) the critical value (cutoff score on the comparison distribution);
e) your sample’s test score;
f) your conclusion on whether to accept or reject the null hypothesis (you must show how the comparison of your cutoff score with your sample’s test score leads to your conclusion).
This is the problem:
4. An industrial/organizational psychologist is interested in determining whether adding 15-minute breaks increases worker productivity. She selects a sample of 20 participants and measures their productivity before and after introducing the 15-minute breaks. The test statistic was -3.15.
somebody help
