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Q1) Median can be a more suitable measure of central tendency than mean if distribution of the data is extremely skewed.
a) False
b) True
c) It does not matter, when data are skewed mean and median are the same
d) It does not matter, when data are skewed the mean, median, and mode are the same
Q2) According to Chebyshev's theorem, proportion of values from data set which is further than two standard deviations from the mean is at most:
a) 0.50
b) 0.13
c) 1.00
d) 0.25
Q3) In study of elephants researcher desires to find out average weight of certain subspecies of elephants. From earlier studies, standard deviation of weights of elephants in this subspecies is known to be= 1500 pounds. How many elephants does researcher require to weigh so that he can be 80% confident that average weight of elephants in his sample is within 350 pounds of true average weight for this subspecies?
a) 31
b) 39
c) 50
d) 166
The formula for a 95% confidence interval yields the interval 640 ± 5.88. Find out whether each of the given statements is true or false.
This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
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The first step in this assignment is to provide SPSS with the Value Labels for the values in LOCALE97.
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