Compute and interpret the margin of error

Reference no: EM13215994

A 2007 study reported in science magazine stated that fifth-grade teachers scored a mean of 3.4 (out of 7) points for "providing evaluative feedback to students on their work." Assume that the sample size was 36 and the sample standard deviation was 1.5.
a. Find t (subscript alpha/2) for a confidence interval with 90% confidence.
b. Compute and interpret the margin of error "E" for a confidence interval with 90% confidence.
c. Construct and interpret a 90% confidence interval for the population mean points scored by fith-grade teachers for providing evaluative feedback.

Reference no: EM13215994

Questions Cloud

Explain challenges managers face with managing uncertainty : Compare and contrast the difference between innovation and entrepreneurship. Describe the challenges managers face with managing uncertainty and risk.

What is expected time in minutes until the next touchdown : Suppose it has been observed that touchdowns scored in a game by your favorite football team are Poisson random variables. The rate is = 4 per game. We know from the lecture that the time until the next touchdown follows an exponential distribut..

What would be the estimated population variance : Suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. Given that he tested 10 people, what would be the estimated population variance?

Confidence interval for the population of all americans : If appropriate, find a 90% confidence interval for the population of all Americans who consider that the amount of federal income tax they pay as too high.

Compute and interpret the margin of error : Find t (subscript alpha/2) for a confidence interval with 90% confidence and compute and interpret the margin of error "E" for a confidence interval with 90% confidence.

Find the point estimate of the population mean : Find the point estimate of the population mean, calculate Standard deviation/√n and calculate Z (subscript-alphasymbol/2) interval for the 95% confidence level.

Explain cultural differences between the team members : Thinking about the cultural differences between the team members (e.g. language, decision making processes), prepare a short list of recommendations that address the following:

Contrast the investing activities section of the cash flow : Assess whether the direct or indirect cash flow statement is higher quality financial reporting, consider whether direct cash flow information (1) is useful for predictive purposes, or (2) is valued in the direct cash flow reporting format, relati..

Normally distributed in the population : Assume that the data are normally distributed in the population. Now go back and examine the $1,250 figure published by Runzheimer International. Does it fall into the confidence interval computed from the sample data? What does it tell you?

User Account

All Pages