Assume the following grade distribution follows a normal distribution. If the class has 80 students, fill in the remaining frequencies for the frequency distribution. Grade Frequency A 5 20 C F Grade Frequency A. 20 80 20 Grade Frequency A. 20 C 30 20 Grade Frequency 20 60 D 20 F 5. B. C.

Construct a frequency distribution and a frequency histogram for the data set using the indicated number of classes. Describe any patterns. Construct a frequency distribution of the data. Use the minimum data entry as the lower limit of the first class. Number of classes: 8 Class Frequency Data set: Finishing times (in seconds) of 20 male participants in a 5K race 1. D0 2. D- 3. 1717 1631 1575 1472 2300 4. O0 5. OO 6.- 1443 1250 1803 1597 1776 1957 1520 1826 1617 1304 1819 2018 2080 1578 1478 7. 8. Construct a frequency histogram of the data. OA. O B. OOOOO OOO

Use the following digits to construct a frequency distribution and then a histogram. Use classes of 0, 1, 2, 3 , 4 , 5 , 6, 7 , 8, 9 (note that each class only contains one value) 000000112333455555555555566888899

Construct a frequency distribution for the data using five classes. Describe the shape of the distribution. The ages of dishwashers (in years) in 20 randomly selected households are shown below. 9 13 5 15 12 6 4 9 11 1 7 898 7 6 8 8 21 OA. bell shaped OB. skewed to the left OC. skewed to the right O D. uniform

Answer all questions

is a graph showing the number of observations in each class of a frequency distribution. O a histogram O b. polygon O c. frequency distribution O d. relative frequency distribution

The numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Make a frequency distribution for the data. X 1 3 f Number of professors 25- 20- 15- 10- 4 20 23 15 1 2 3 4 Number of courses taught per semester