Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Last fall, a sample of n = 30 freshman was selected to participate in a new 4-hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshman class. All freshman must take the same English Language Skills course, and the mean population score on the final exam for the entire freshman class was µ = 74 (assume ? is unknown). The sample of students (n = 30) in the new program had a mean score of M = 84 with a standard deviation of s = 18. Using a one-sample t-test, evaluate the hypothesis that the new training program had an influence on performance in the English Language Skills course.
a. Using symbols, state the hypotheses (H0 and H1) for a two-tailed test.
b. Find the critical value/region for an ? = .01 for a two-tailed test.
c. Calculate the test statistic (t-statistic) for the sample.
d. Make a decision and write a conclusion statement for your result.
If the gas mileages are normally distributed with a standard deviation of 2.1, find the probability that a car has a gas mileage of between 29.2 and 30.3 miles per gallon.
determine the point estimate of the population the margin of error for the following confidence interval and the number
A confidence interval estimate for the population mean is given to be (35.55, 44.12). If the standard deviation is 15.797 and the sample size is 37, answer each of the following: (A) Determine the maximum error of the estimate, E.
in 2005 congress passed the bankruptcy abuse prevention and consumer protection act.nbsp this act made significant
The ACT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are normally distributed. In a recent year, the mean test score was 21.1 and the standard deviation was 5.0.
question cellulon a manufacturer of a new type of home insulation wants to develop guidelines for builders and
based on a survey of 1000 adults by greenfield online and reported in a may 2009 usa today snapshot adults 24 years of
1 the cincinnati enquirer reported that in the united states 66 of adults and 87 of youths ages 12 to 17 use the
the random variable x has the following discrete probability
What is the decision regarding H0? " "Imagine you are conducting a left tailed test of proportions; level of significance is 0.05; calculated z-value is -2.00;
A population of data from a paper supply company is known to have a mean weight of 55 ounces per ream and a population standard deviation of 5 ounces. The population is known to be bell shaped and symmetrical. Which of the following statements is ..
Which gives an expected value of: (0.10)($100) + (0.90)($10) = $19.00. Compute the expected value for the "Reject Christ" decision and pick the "best" choice to make.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd