Category: Uncategorized

Perform the indicated one-way ANOVA test. Decide to reject o…

Perform the indicated one-way ANOVA test. Decide to reject or to fail to reject the null hypothesis that the means are equal. Explain why you decided to reject or fail to reject. Assume that the populations are normally distributed with the same variance. A researcher wishes to determine whether there is a difference in the average age of elementary school, high school, and community college teachers. Teachers are randomly selected from each group. Their ages are recorded below. Test the claim that at least one mean is different from the others. Use ∝ = 0.01. The test statistic is (Round to two decimal places.) The p-value is (Round to two decimal places.) What can you conclude about the claim that at least one mean is different from the others?

Using the following costs of ice cream bars, complete the st…

Using the following costs of ice cream bars, complete the steps below.  1.29      1.37      1.30      0.80      0.67       1.33      1.37      1.37      1.53      0.55  1.27      0.93      0.63      0.80      0.27       1.38      0.77      1.14      0.80      0.70  0.36      0.65      0.47      0.68       0.50 a) Find and label the statistics of the 5-number summary. (Do not round.) Label Number b) Construct the boxplot using the number line below.  You must show your boxplot on your exam work pages to receive credit.

The dot plot below shows the GPA for 20 students (each dot r…

The dot plot below shows the GPA for 20 students (each dot represents one student) at a community college. Use the data to calculate the mean and the standard deviation of the grade point averages.  The mean is and the standard deviation is (Round to two decimal places for each)