Exam 10: Introduction to Statistics

Find the standard deviation of the data summarized in the given frequency table. -The heights of a group of professional basketball players are summarized in the frequency table below. Find the standard deviation. Round your answer to one decimal place.

Find the median. - $47,20,7,5,27,13,21,42,37,31$

Find the mean for the frequency distribution. Round to the nearest tenth. -

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Greater than 13.4 seconds

Solve the problem. -The stem and leaf plot depicts the debt-to-income ratios of loan applicants at a nearby bank. Do more applicants have debt-to-income ratios in the 20's or 50's?

Find a $z$ score satisfying the given condition. - $25.1 \%$ of the total area is to the right of $z$ .

Find the area under the normal curve. -Find the percent of the area under a normal curve between the mean and 0.35 deviations from the mean.

Find the area under the normal curve. -Find the percent of the area under a normal curve between the mean and 2.41 deviations from the mean.

In a certain distribution, the mean is 50 with a standard deviation of 6 . Use Chebyshev's theorem to tell the probabilitythat a number lies in the following interval. Round your results to the nearest whole percent. -Between 20 and 80

Find the mean for the frequency distribution. Round to the nearest tenth. -

Construct a boxplot. -The weights (in ounces) of 27 tomatoes are listed below. Construct a boxplot for the data. 1.7 2.0 2.2 2.2 2.4 2.5 2.5 2.5 2.6 2.6 2.6 2.6 2.6 2.7 2.8 2.8 2.8 2.9 2.9 2.9 3.0 3.0 3.1 3.1 3.3 3.6 4.2

Find the mean for the frequency distribution. Round to the nearest tenth. -

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Between 15.2 and 16.1 seconds

Solve the problem. -Find the percent of the area under the standard normal curve between $\mathrm{z}=-2.49$ and $\mathrm{z}=1.19$ .

Solve the problem. -The stem and leaf plot depicts the scores earned on individual driver tests in the month of July. How many people scored fewer than 50 points?

Describe the shape of the given histogram. -

Find the median. -The weights (in ounces) of 21 cookies are shown. Find the median weight. Round to the nearest hundredth. 0.81 1.48 0.86 1.62 0.73 0.89 1.00 1.48 1.53 0.92 0.81 1.13 1.42 0.69 0.47 1.13 0.89 1.42 1.72 0.73 0.56

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Between 16.1 and 17 seconds

Find the range for the set of data numbers. - $55,147,17,109,195$

Construct a frequency polygon. -