Reference no: EM132404052
1.) Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and? 95% confidence interval.Sample size equals 100?, sample mean equals 65?, sample standard deviation equals 7
The margin of error is:______
?(Round to the nearest tenth as? needed.)
2.) Suppose you know that the distribution of sample proportions of nonresidents in samples of 200 students is normal with a mean of
0.46 and a standard deviation of 0.06. Suppose you select a random sample of 200 students and find that the proportion of nonresident students in the sample is
0.42.
a. How many standard deviations is the sample proportion from the mean of the distribution of sample? proportions?_______
3.) Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and? 95% confidence interval. Sample size equals 1062?, sample mean equals $46,257?, sample standard
deviation equals ?$28,000 The margin of error is_______.
?(Round to the nearest dollar as? needed.)