Find the mean for the given sample data. Bill kept track of the number of hours he spent exercising each week. The results for four months are shown below. Find the mean number of hours Bill spent exercising per week. Round your answer to two decimal places. 6.90 6.60 6.70 6.90 7.20 6.90 7.40 6.70 8.10 6.90 6.90 6.70 8.80 6.60 6.60 7.70 7.20 7.40

Find the median for the given sample data. A store manager kept track of the number of newspapers sold each week over a seven-week period. The results are shown below. 78, 43, 228, 194, 259, 236, 235 Find the median number of newspapers sold.

Find the mode(s) for the given sample data. 20, 21, 46, 21, 49, 21, 49

Find the mean of the data summarized in the given frequency distribution. The highway speeds of 100 cars are summarized in the frequency distribution below. Find the mean speed. speed(mph) Cars 30-39 3 40-49 17 50-59 51 60-69 16 70-79 13

Find the standard deviation of the data summarized in the given frequency distribution. The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation. Score students 50-59 8 60-69 6 70-79 10 80-89 5 90-99 11

Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if its z-score is less than -2.00 or greater than 2.00. Round the z-score to the nearest tenth if necessary. A body temperature of 96.8° F given that human body temperatures have a mean of 98.20° F and a standard deviation of 0.62°.

Determine which score corresponds to the higher relative position. Which is better: a score of 82 on a test with a mean of 70 and a standard deviation of 8, or a score of 82 on a test with a mean of 75 and a standard deviation of 4?

Find the percentile for the data point Data set: 124 136 128 122 130 132 122 120 127 124 128 138 120 124 126 121; data point 130

Find the indicated measure. The weights (in pounds) of 30 newborn babies are listed below. Find Q1. 5.5 5.7 5.8 6.0 6.1 6.1 6.3 6.4 6.5 6.6 6.7 6.7 6.7 6.9 7.0 7.0 7.0 7.1 7.2 7.2 7.4 7.5 7.7 7.7 7.8 8.0 8.1 8.1 8.3 8.7