Calculate the sample mean and sample variance for the following frequency distribution of heights in centimeters for a sample of 8-year-old boys. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Heights in Centimeters Class Frequency 120.1 - 123.8 19 123.9 - 127.6 44 127.7 - 131.4 46 131.5-135.2 29

The following data are the incomes (in thousands of dollars) for a sample of 11 households. 75 84 112 74 104 81 90 94 144 a. Determine the mean, mode, median, range, and interquartile range (IQR). b. Calculate the variance and standard deviation. c. Construct a box-and-whisker plot for these data.

Listed below are heights in inches of fathers and their first sons. Father Son Difference 1. Complete the table and find the differences 2. Use a 5% level of significance to test the claim there is no difference in heights between fathers and first sons. 72 73 66 68 Sample Data 69 68 70 71 70 70 70 70 70 71 75 71 68 70

Identify the mean, median and mode based from the data below.

Find the sample standard deviation for the following Grouped Frequency Data Table (GFDT).  Lower Class Limit Upper Class Limit Frequency 40 44 1 45 49 8 50 54 3 55 59 4 60 64 6 65 69 11 70 74 2 75 79 9 80 84 5

Complete the following frequency chart.A frequency chart of temperatures Temperature Frequency Relative Frequency 70 - 74     75 - 79     80 - 84     85 - 89     90 - 94                       From the frequency chart, calculate the mean. How does the mean from the raw data (question 7) compare to the mean from the grouped data (question 9)? Use the frequency chart to create a histogram of the daily high temperatures at Cox-Dayton International Airport for June and July 2018. Describe the distribution by shape, center, and spread. Also, state whether there are any outliers.

5.) Find the mean, median, range, variance and standard deviation of the data set below. The data represent the fixed monthly costs for Sam's Linen Service. Monthly charges Monthly cost ($) Bank charges 482 Cleaning 2208 Food 1750 Computer expenses 2471 Lease payments 2656 Grounds fees 1475 Postage 2117 Uniforms 2600 Delivery fuel 955

Ms. Lorraine Finch, a fifth grade teacher has a large class of 50 students for the 2018 - 2019 school year. After giving a reading comprehension test, Ms. Finch decided to do a brief statistical analysis. A frequency distribution of the results is presented below. a. Fill in the missing pa rts of Ms. Finch’s frequency distribution. Do any necessary scrap work in the space next to the table. b. Construct a histogram of the frequency distribution.   c Is the distribution of test scores normal? Explain.   Score   Frequency   Relative Frequency 84         2                    0.04 85         5                     0.1 86                                 0.08 87       8                       0.16 88       10                      89        90      5                         0.1 91       4                         0.08 92       3                         0.06