Question

A research group conducted an extensive survey of 2853 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1528 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1.8% of the population percentage? (Hint: Use p ≈ 0.54 as a preliminary estimate. Round your answer up to the nearest whole number.)

Consider the following.

(a) What measures of variation indicate spread about the mean? (Select all that apply.)

variance

standard deviation

coefficient of variation

mean

(b) Which graphic display shows the median and data spread about the median?

5-number summary

histogram    

box-and-whisker plot

frequency chart

Answer 1

Q 1) Sample Size is

a) Answer:

variance

standard deviation

coefficient of variation

b) Answer:

5-number summary

box-and-whisker plot