Reference no: EM13852216

Question 1:

The following scores were obtained by a university professor on an English exam

48	52	77	46	60	57	92	75
57	52	72	78	72	62	46	70
74	90	67	51	55	46	79	66
57	76	53	68	55	73	83	85
47	78	61	70	82	78	69	50
68	69	76	81	84	79	64	72
48	56	82	71	93	72	56	78
76	73	49	78	63	54	72	76

a. "Construct a frequency distribution table of the scores having approximately 10 class intervals. The table must include the following:

Class intervals, Real Limits, Tally, frequency, Relative Frequency, Cumulative frequency, and Cumulative frequency percentage"

b. Using the frequency distribution created in part a, construct a histogram

c. Using the frequency distribution created in part a, construct a cumulative percentage curve. Use your curve to determine the percentage of scores that fall below a value of 55.

d. Describe the data

Question 2:

A social psychologist interested in the dating habits of college undergraduates, samples 16 students and determines the number of dates they have had in the last six months. See scores below

1	8	9	3	0	7	4	5
0	10	5	4	0	2	3	8

Compute the following:

a. Arithmetic mean
b. Median
c. Mode
d. Range
e. Standard deviation (s)
f. Variance (s2)
g. Which measure of central tendency best describe the dating scores? Explain your choice.

Question 3:

From the following distributions, state whether you would use the mean, mode, or the median to present the central tendency of the distribution. Explain Why?

i) 6, 3, 4, 32, 2, 7, 9

ii) 23, 21, 14, 10, 12, 18

iii) 0.5, 2.1, 0.9, 1.7, 1.2, 1.8, 2.4

iv) 1, 2, 1, 7, 2, 3, 1, 3, 2, 5, -1, 1, 1, 4