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!
A researcher is exploring effectiveness of new study-skills training program for elementary school children. Sample of n= 25 third grade children and each child is given standardized achievement test at end of year. For regular population of third grade children, scores on test form normal distribution with mean of µ = 150 and standard deviation of σ = 25. Mean for the sample is M = 158.
a. Recognize independent and dependent variables for this study.
b. Suppose two-tailed test, state hypotheses (Ho and H1 ) for two-tailed test.
c. Using symbols, define hypotheses (Ho and H1) for two-tailed test.
d. Draw the suitable distribution, and locate critical regions for α = .05.
e. Compute test statistics (z score) for the sample.
f. What decision must be made about effect of program?
A survey was conducted to measure height off men. In survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.2 inches and a standard deviation of 2.0 inches.
Based on these results, does te diet appear to be effective? Does the diet appear to have practical significance?
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
Someone gives you 10 to 1 odds that you cannot roll a double number with the roll of a pair of dice. You win $10 if you succeed and you lose $1 if you fail. What is the expected value of the game for you? What can be expected if you play 100 times..
The sample mean, the sample proportion and the sample standard deviation are all unbiased estimators of the corresponding population parameters. True or false (please provide a solution or explanation).
The Financial Advisor exam has a mean of 500 and a standard deviation of 20. If the bank chooses to hire either Steve or Mark based solely on their exam performance, who is the bank more likely to hire? Show evidence for your answer.
Suppose that the two lists are combined to produce a new list of 18 values. What is the average (mean) of this new list?
An automobile manufacturer has a new model that they claim gets 27 miles per gallon. A consumer testing agency chooses 50 of these cars and finds that the sample mean is 25 miles per gallon and the sample standard deviation (s) is 3 miles per gall..
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
What is the p-value associated with the above sample result?
Identify the null hypothesis, alternative hypothesis, test statistic, P-value and conclusion about the null hypothesis. Use the P-value method.
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