Exam 8: Hypothesis Testing Using the One-Sample T-Test

Using the following data, conduct a two-tailed t-test.Use a known population mean of 49 and α = .05. 55 48 59 50 48 52 50 48 57 54 50 52 54 43 44 53 40 46 50 51 ==50.2 ===21.958 ==4.69 ==1.05 ==+1.14 =\pm2.093

Which of the following is not one of the steps in a one-sample t-test?

Using the following data, calculate the sample standard deviation. 55 48 59 50 48 52 50 48 57 54 50 52 54 43 44 53 40 46 50 51

What is the name of the procedure we can use in the unlikely event that our t-obtained value falls between two t- critical values in the t-table?

Suppose we have a 95% confidence interval of 12.23 and 16.75.What does this mean?

Using the following data, conduct a one-tailed t-test in the upper tail.Use a known population mean of 49 and α = .05. 51 48 52 50 48 52 50 48 52 54 50 52 54 47 49 53 47 46 50 51 ==50.2 ===5.537 ==2.35 ==0.525 ==+2.29 =+1.729

Suppose you conduct an experiment with 20 subjects and the $t_{o b t}$ turns out to be 0.69, which is not statistically significant.What is the correct way to report your results?

When is a t-test used instead of a z-test?

Using the data given below, perform a two-tailed t-test to compare the sample mean to μ = 35.5.Use α = .05

Suppose you conduct a one-tailed t-test and your results are significant at both the .05 and .01 levels.What should you report and why?

Identify the major difference between the z- and t-obtained formulas.

Using the following data, conduct a one-tailed t-test in the upper tail.Use a known population mean of 49 and α = .05. 55 48 59 50 48 52 50 48 57 54 50 52 54 43 44 53 40 46 50 51 ==50.2 ===21.958 ==4.69 ==1.05 ==+1.14 =+1.729

Conduct a two-tailed t-test for $\bar{X}=50, s_{X}^{2}=20, N=41$ and μ = 48.Use α = .05.Calculate the $t_{o b t}$ .

Interval estimation suggests a ________ where we expect the ________ to fall.

Suppose you're computing a one-sample t-test and you just finished computing your t-obtained.What is the next step for you to take?

Suppose we have a sample mean of 12, estimate standard error of the mean of 2.5, and a t-critical value of 2.306.What would be the lower and upper limits of our confidence interval?

To achieve statistical significance for a one-sample t-test,

Using the following data, calculate the sample mean. 55 48 59 50 48 52 50 48 57 54 50 52 54 43 44 53 40 46 50 51

For a two-tailed test with α = 0.05, the $t_{\mathrm{crit}}$ value is

What happens to the absolute value of $t_{\mathrm{crit}}$ as df increases? It