In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equal-size towels were used, with four sections of towels tested per brand. The absorbency rating data follow. At a 0.05 level of significance, does there appear to be a difference in the ability of the brands to absorb water? Brand Y 91 99 83 100 96 88 88 94 89 89 99 76

Pn.n.m.

Data for gas mileage (in mpg) for different vehicles was entered into a software package and part of the ANOVA table is shown below: Source   DF     SS     MS   Vehicle   5     420     210.00   Error   66     321     4.86   Total   71     741       If a LSRL was fit to this data, what would the value of the coefficient of determination be?

To examine the effect of relaxing music on math test performance, a researcher wants to compare the average math test scores of participants who completed the test with relaxing music to performance of participants who completed the same math test without music. The partially computed data collected in the study are shown below: Math Test with Music:         Math Test without Music: n1 = 16                                     n2 = 12 M1 = 82                                    M2 = 78 SS1 = 150                                 SS2 = 140 Based on these results, is there a significant effect of relaxing music on math test performance? Use a t-test for independent samples with p < .01, 2-tails to answer this research question. Follow the steps of hypothesis testing and insert your answers below. In your calculations, round all numbers to two decimal places to avoid rounding errors. ANSWER H0: H1: Computed pooled variance sp2: Estimated standard SM1 - M2: Computed t: Critical t-value for…