In an efiort co counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the 336 students in the class, so that each version was given to 84 students. After the exam, the professor computed the following information about the scores (the exam was worth 200 points): Sample Sample Sample size Group mean variance Version A 84 156.8 472.4 Version B 84 151.7 288.1 Version C 84 152.1 488.9 Version D 84 155.3 397.3 Send data to calculator Send data to Excel The professor is willing to assume that the populations of scores from which the above samples were drawn are approximately normally distributed and that each has the same mean and the same variance. Answer the following, carrying your intermediate computations to at least three decimal places and rounding your responses to at least one decimal place. (a) Give an estimate of this common population variance by pooling the sample variances given. (b) Give an estimate of this common population variance based on the variance of the sample means given.

In an efiort co counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the 336 students in the class, so that each version was given to 84 students. After the exam, the professor computed the following information about the scores (the exam was worth 200 points): Sample Sample Sample size Group mean variance Version A 84 156.8 472.4 Version B 84 151.7 288.1 Version C 84 152.1 488.9 Version D 84 155.3 397.3 Send data to calculator Send data to Excel The professor is willing to assume that the populations of scores from which the above samples were drawn are approximately normally distributed and that each has the same mean and the same variance. Answer the following, carrying your intermediate computations to at least three decimal places and rounding your responses to at least one decimal place. (a) Give an estimate of this common population variance by pooling the sample variances given. (b) Give an estimate of this common population variance based on the variance of the sample means given.

Name: In an efiort co counteract student cheating, the professor of a large
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: In an efiort co counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the 336students in the class, so that each version was given to 84 students. After the exam, th

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Fund the mean and variance for the following sample data 12, 16, 11, 23, 9, 17, 12, 25
Consider the following two sample data sets. Set 1: 7 5 3 8 9 Set 2: 8 13 14 2 5 a. Calculate the coefficient of variation for each data set. b. Which data set has less consistency (or more variability)?
Consider the following data: 5,−5,5,−5,−5,14,55,−5,5,−5,−5,14,5 Copy Data Step 1 of 3 : Calculate the value of the sample variance. Round your answer to one decimal place.
fill blanks underlines.
A district health officer wishes to determine if the six villages in his district are independent of residents contracting malaria, schistosomiasis, cholera or tuberculosis. Identity an appropriate statistical test and the tail of the test for the problem. Assume all samples used for study come from a normal population.
At a recent home football game, the Falcons surveyed fans to name their favorite Falcons player. What type of data was collected? Bivariate and Quantitative Bivariate and Categorical Univariate and Quantitative Univariate and Categorical