Question

Assignment-2.pdf (page 1 of 2) Q Search SYC 2317 Mork W. Tengler, MS Assignment #2 An instructor obtained the following set of sores from a 10-point quiz for a class of 26 students: 2.1 8, 5, 4, 5, 5, 7, 6, 4, 3, 4, 5, 6, 6, 4, 5, 5, 10, 6, 9, 5, 7, 8, 2, 6, 7, 4 Place the scores in a frequency distribution table. b. Sketch a histogram showing the distribution. Using your graph, answer the folowing questions: I. What is the shape of the distribution? 2. A a whole, how did the class do on the quiz? Were most scores high or low? Was the quiz easy or hard? c. 2.2 For each of the following situations, identify the measure of central tendency (mean, median, or mode) that would provide the best description of the "average" or most representative score. Please explain your choice: A researcher asks each individual in a sample of 50 adults to name his/her favorite season (summer, fall winter, spring) An insurance company would like to determine how long people remain hospitalized after a routine appendectomy. The data from a large sample indicate that most people are released after 2 or 3 days but a few develop infections and stay in the hospital for weeks A teacher measures scores on a standardized reading test for a sample of children from a middle-class, suburban elementary school

Answer 1

Solution:-

2.1)

a)

Class interval	Frequency
1 to 3	1
3 to 5	6
5 to 7	12
7 to 9	5
9 to 11	2
Sum	26

b)

Histogram 14. 12 10 4 2 0 1 to 3 3 to 5 5 to 7 7 to 9 9 to 11

c) 1) The shape of the distribution is Approximately symmetrical or normal.

2) Most of the class has scored between 5 to 7. Most of the scores are average. Quiz seems to be not easy nor hard.