alternative hypotheses? A. Ho: The distribution of fatal injuries for riders not wearing a helmet foll H₁: The distribution of fatal injuries for riders not wearing a helmet do B. Ho: The distribution of fatal injuries for riders not wearing a helmet do H₁: The distribution of fatal injuries for riders not wearing a helmet do OC. None of these. Compute the expected counts for each fatal injury.

NEED HELP WITH: E, F, G

fill in blank, there are only 3 options, decreases, increases or remain the same.

1. State the test statistic: t = 2. State the p-value: 3. Decision: Fail to reject the null hypothesis Reject the null hypothesis

K Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown below. 43 51 11 90 77 36 64 37 42 72 54 62 36 75 51 72 37 28 38 61 47 63 36 41 22 37 51 46 85 13 To find the 10% trimmed mean of a data set, order the data, delete the lowest 10% of the entries and the highest 10% of the entries, and find the mean of the remaining entries. Complete parts (a) through (c). (a) Find the 10% trimmed mean for the data. The 10% trimmed mean is (Round to the nearest tenth as needed.)

Normal probability plots for three data sets are shown below. Which plot indicates that the data are approximately normally distributed? C. A. O O O O Plot B Plot A Plot C Plots A and B B. Q ME

The degrees of freedom determine the _____ the t distribution? a.   mean of b.   variance of c.    shape of  d.    range of

76) A study was conducted to investigate how effective a new diet was in lowering cholesterol. Results for the randomly selected subjects are shown in the table. The differences have a normal distribution. Are the subjects' cholesterol levels lower on average after the diet? Test at the 5% level. Subject A B D E F H I Before 213 211 209 202 220 | 221 242 244 226 After 203 222 193 213 221 206 215 227 205

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Can someone please help? Thank you.