Fimd the Z score associated with the 15th percentile.

Describe the range of values for the correlation coefficient.

what is a z-score of 80%?

sample of 8 students scored the following grades: 20, 40, 35, 30, 57, 57, 46, 42. Find the sample mean, mode and median. OCompute the standard deviation.

A golf pro claims that his mean golf score is 63. A sportswriter wants to test the claim that his mean score is higher 63. Would this be a left-tailed, right-tailed, or two-tailed test?

A personal trainer wanted to know if there was a correlation between the number of trips her clients made to the gym each week and the average amount of time they exercised every visit. Client Number of visits per week Average time spent exercising per visit (hours) 2 1.5 0.30 Based on the above data, estimate the average time spent exercising per visit for 4 visits per week. Select one: a. 10.04 hours b. 0.86 hours c. 1.03 hour d. 2 hours 15 I.

A newspaper collected information on schools in its circulation area in order to compare their quality. Two Which is a true statement regarding Springside? measures the newspaper collected for each school, O Springside does not affect the correlation. mean class size and mean score on a statewide O Springside weakens the correlation shown in the scatterplot. reading exam, are shown in the scatterplot. One school in the report, Springside Elementary, is labeled in the graph. O Springside strengthens the correlation shown in the scatterplot. O Removing Springside would increase the value of the correlation coefficient. Comparing Schools 90 Springside 70 60 50 40 Save and Exit Next Submit Mark this and return ContentViewers/AssessmentViewer/Activity# ch hp Mean State Test Score

What is the standard error of the mean?

Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What can you say is most likely true about GPAs in our class?

For item 4 to 6. Table 3.8 shows the heights of a sample of 12 fathers and their oldest adult sons. Find the coefficient of rank correlation in two decimal places. Height of father(inches) 65 63 67 64 68 62 70 66 68 67 69 71 X Height of 68 66 68 65 69 66 68 65 71 67 68 70 son(inches) Y sample answer. 0.15 -0.65