A random sample of n = 25 individuals is selected from a population with µ = 20, and a treatment is administered to each individual in the sample. After the treatment, the sample mean is found to be M = 22.2, with SS =384. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05. Write the hypothesis test out on a homework worksheet so that you can check your work. Then answer the question below: What is the critical value?

A random sample of n = 25 individuals is selected from a population with µ = 20, and a treatment is administered to each individual in the sample. After the treatment, the sample mean is found to be M = 22.2, with SS =384. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05. Write the hypothesis test out on a homework worksheet so that you can check your work. Then answer the question below: What is the critical value?

Name: A random sample of n = 25 individuals is selected from a population wi
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: A random sample of n = 25 individuals is selected from a population with µ = 20, and a treatment is administered to each individual in the sample. After the treatment, the sample mean is found to be M = 22.2, with SS =384.Based on the sample data, do

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

See similar textbooks

Similar questions

The NAEP considers that a national average of 283 is an acceptable performance. Using α = .05, run a two-tail t-test for one sample to test Ho: µ=283 for the 2019 scores. Report the t-obt, df, and p-values. Would you reject the null hypothesis that the 2019 scores come from a population with average 283? If this is the case, does it come from a population from larger or smaller average?
A researcher administers a treatment to a sample from a population with a mean of m=50. If the treatment is expected to increase scores and a one-tailed test is used to evaluate the treatment effect, the the null hypothesis states that m=40. True or false?
To evaluate the effect of a treatment, one sample of n=8 is obtained from a population with population mean: u=40 and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M=35. 1. If the sample variance is s^2=32, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with alpha=.05? (show work please, and state both experimental and statistical hypotheses, and state your decision regarding the H0. (all 4 steps of hypothesis test) 2a. If the sample variance is s^2=72, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with alpha=.05? (please show your work and state your decision regarding the H0.) 2b. Calculate Effect size by using r^2 (percentage of variance explained) and state the meaning of effect size.
Are sexually active teenagers any better informed about AIDS and other potential health problems related to sex than teenagers who are sexually inactive? A 15 – item test of general knowledge about sex and health was administered to random samples of teens who are sexually inactive, teens who are sexually active but with only a single partner, and teens who are sexually active with more than one partner. Is there any significant difference in the test scores? Test the hypothesis at α = 0.05. Inactive Active (One Partner) Active (More than One Partner) 10 11 12 12 11 12 8 6 10 10 5 4 8 15 3 5 10 15
A nationwide study of undergraduate students reported that the mean number of drinks consumed per week during the spring semester is 7.96. The mean number of drinks consumed per week at USC is 7.64 (s.d.=2.55, N=412 Health services is concerned that USC students are consuming significantly more alcohol per week than the national average. Using an alpha level of .05, Is there sufficient evidence to be concerned? Be sure to select the correct critical value for the alternative hypothesis, and then use this evidence to make your conclusion
A researcher did a one-tailed one-sample t-test to test the hypothesis that babies prefer the color blue over the color red. He collected a sample of 26 babies and presented them with a red plastic star and a blue plastic start for 12 seconds. The researcher measured the amount of time each baby spent watching the blue star out of the 12 seconds. What is µ based on the null hypothesis?