A large survey of sexual attitudes and behavior in Britain b

A large survey of sexual attitudes and behavior in Britain between 1999 and 2001 interviewed 11,161 randomly chosen people aged 16-44. The following results were reported on the number of heterosexual partners individuals had had in the previous five-year period.

Sample size

Mean

Standard deviation

Men

4620

3.8

6.7

Women

6228

2.4

4.6

Question 13 (0.5 points)

Which describes better the variation among men in the number of sexual partners?

Question 13 options:

standard error

standard deviation

Question 14 (0.5 points)

Which describes better the uncertainty in the estimated mean number of partners in women?

Question 14 options:

standard error

standard deviation

Information

What are the 95% confidence intervals for the means?

Your numerical answer should have only one decimal place, so should be of the form x.x

Question 15 (0.25 points)

men lower limit of interval

Your Answer:Question 15 options:

Question 16 (0.25 points)

men upper limit of interval

Your Answer:Question 16 options:

Question 17 (0.25 points)

women lower limit of interval

Your Answer:Question 17 options:

Question 18 (0.25 points)

women upper limit of interval

Your Answer:Question 18 options:

	Sample size	Mean	Standard deviation
Men	4620	3.8	6.7
Women	6228	2.4	4.6

A large survey of sexual attitudes and behavior in Britain between 1999 and 2001 interviewed 11,161 randomly chosen people aged 16-44. The following results were reported on the number of heterosexual partners individuals had had in the previous five-year period. Which describes better the variation among men in the number of sexual partners? Which describes better the uncertainty in the estimated mean number of partners in women? What are the 95% confidence intervals for the means? men lower limit of interval men upper limit of interval women lower limit of interval women upper limit of interval

Solution

Question 13. The standard deviation because it measures the variability of individuals.

Question 14. The standard error because it measures the variability of the average.

confidence interval on the mean, you compute the mean of a sample in order to estimate the mean of the population

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Confidence Interval:men