If you wish to estimate a population mean with a sampling distribution error SE= 0.28 using a 95% confidence interval and you know from prior sampling that o2 is approximately equal to 5.2, how many observations would have to be included in your sample? The number of observations that would have to be included in your sample is. (Round up to the nearest observation.)

A statistics practitioner took a random sample of 57 observations from a population whose standard deviation is 25 and computed the sample mean to be 103. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.   A. Estimate the population mean with 95% confidence. Confidence Interval =  B. Estimate the population mean with 95% confidence, changing the population standard deviation to 58; Confidence Interval =  C. Estimate the population mean with 95% confidence, changing the population standard deviation to 7; Confidence Interval =

In the population of senior students at Shermer High School, the proportion who plan to attend college is 0.64. In a random sample of 100 students from this population, the proportion who plan to attend college is 0.75.  We would call the value 0.64 a   P-value. z-score. parameter statistic significance level.

We provide a sample mean, sample size, sample standard deviation, and confidence level. a. use the one-mean t-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn. b. obtain the margin of error by taking half the length of the confidence interval. c. obtain the margin of error by using the formula tα/2•s/n. x = 55, n = 16, s = 5, confidence level = 99%