6) What effect does sample size have on the width of the confidence interval?

a) Increasing the sample size will decrease the width of the confidence interval.

b) Increasing the sample size will increase the width of the confidence interval.

c)Decreasing the sample size will decrease the width of the confidence interval.

d)Changing the sample size has no effect on the width of the confidence interval.

7) Ina recent health survey there were 333 adult respondents who reported a history of diabetes out of of 3573 respondents.Does the sampling distribution of the proportion of respondents who reported a history of diabetes have an approximate normal distribution?Assume that n < 0.05N.

Yes, because np(1-p)=3573

Yes, because np(1-p) is approximately 28

No, because np(1-p)>10

Yes, because np(1-p) is approximately 302