Find the margin of error for each data from certain populations. 3. 45, 56, 61, 88, 91, 64, 38, 79, 80, 57 at 90% confidence interval.

Construct a 90​% confidence interval of the population proportion using the given information.   x=240, n=300

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…

If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion.

Use the confidence interval to find the margin of error and the sample mean.   (.364,0.500)

Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and​ 95% confidence interval.   n=49​, x=55.1 ​seconds, s=4.8 seconds       The margin of error is nothing seconds.

Use the confidence interval to find the margin of error and the sample mean. (1.77, 2.01) The margin of error is

Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds.  Find the t and calculate a 95% (α = .05) confidence interval.

Solve for B which reads assume prior studies have shown that about 45% of full-time students are in bachelors degree and four years or less. n=

Use the confidence interval to find the margin of error and the sample mean. (0.636, 0.760)