# Statistics frequency and standard deviation

Having trouble comprehending the attached questions. Need to complete these tasks for a study guide to final exam.

1 of 9

A medical research team studied the ages of patients who had strokes caused by stress. The ages of 34 patients who suffered stress strokes were as follows. Use 8 intervals starting with 25-29.

29 30 36 41 45 50 57 61 28 50 36 58

60 38 36 47 40 32 58 46 61 40 55 32

61 56 45 46 62 36 38 40 50 27

2 of 9

Prepare a frequency distribution for the given data with columns for intervals and frequencies.

The following is the number of hours students worked per week at after-school jobs. Use five intervals, starting with 0 - 4.

1 6 14 18 20 21 15 11 7 2 6 13 15 22 16 13 4 10 14 19

3 of 9

Construct a stem-and-leaf display for the given data table.

4 of 9

Choose the one alternative that best completes the statement or answers the question.

Construct a stem-and-leaf display for the given data table.

5 of 9

Find the standard deviation of the data summarized in the given frequency table.

The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency table below summarizes the results. Find the standard deviation. Round your answer to one decimal place.

5.5

5.3

5.0

5.4

6 of 9

Choose the correctly constructed frequency polygon.

7 of 9

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

Between 35 and 65

At least 89%

At least 80%

At least 84%

At least 86%

8 of 9

Using the information in the table on home sale prices in the city of Summerhill for the month of June, find the mean for the grouped data.

172.95

168.52

157.50

188.45

9 of 9

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

Less than 20 or more than 80

At most 4%

At most 2%

At most 6%

At most 1%

#### Solution Summary

This includes nine problems regarding various aspects of statistics include mean, standard deviation, frequency, Cheybshev's theorem, and working with data