Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Hypothesis testing for mean and variance.

Utilize the following to answer 1 through 3
A psychological researchers has a theory that predicts women will tend to carry more cash than men. A random sample of Ersatz University students revealed that 16 females had a mean of $22.30 in their wallets with a standard deviation of $3.20, even as 6 males had a mean of $17.30 with a standard deviation of $9.60.

1. The researcher's hypothesis would lead us to perform a
A. right-tailed test
B. left-tailed test
C. two-tailed test
D. None of the above

2. The test statistic for the researcher's main hypothesis is
A. 4.000
B. 1.250
C. 2.500
D. 1.884

3. At α = 0.05, the degrees of freedom for the researcher's main hypothesis would be
A. 20
B. 5
C. 5 to 15
D. 15

4. A corporate analyst is testing whether inventory turnover has increased. Inventory turnover in six randomly-chosen product distribution centers (PDCs) is shown.
The critical value at α = 0.05 is
A. 1.65
B. 1.47
C. 2.58
D. 2.01

5. Analysis of variance is a technique used to test
A. difference between two variances
B. difference between more than two variances
C. difference between a population mean and a given value
D. difference between two or more means

6. Three bottles of wine are tasted by three experts. Each rater assigns a rating (scale is from 1 = terrible to 10 = superb).

Which test would you use for the most noticeable hypothesis?
A. t-test for independent means
B. one-factor ANOVA
C. two-factor ANOVA without replication
D. two-factor ANOVA with replication

7. In a analysis of variance test, the ratio of the mean square between groups to the mean square within groups follows a
A. normal distribution
B. F distribution
C. Chi-square distribution
D. Student's t distribution

8. Sound levels are measured at random moments under typical driving conditions for various full-size truck models. The ANOVA results are shown below.
The test statistic to compare the means is
A. 2.96
B. 15.8
C. 5.56
D. 4.45

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M919802

Have any Question? 


Related Questions in Statistics and Probability

Repeat given exercise using the following aumann model of

Repeat given Exercise, using the following Aumann model of incomplete information with beliefs: N = {I, II}, Y = {1, 2, 3, 4, 5}, F I = {{1, 2}, {3, 4}, {5}}, F II = {{1, 3, 5}, {2}, {4}} P(ω) = 1/5, ∀ ω ∈ Y. for A = {1, ...

An individual wanted to determine the relation that might

An individual wanted to determine the relation that might exist between speed and miles per gallon of an automobile. Let X be the average speed of a car on the highway measured in miles per hour and let Y represent the m ...

Generally researchers are more concerned about making a

Generally, researchers are more concerned about making a Type I error than a Type II error. Can you think of any instances in which you might be more concerned about making a Type II error?

How could the federal government at the time of the gilded

How could the federal government at the time of the Gilded Age have reduced the economy's exposure to panics and recessions?

Corrections for phase 4in confidence interval calculations

CORRECTIONS FOR PHASE 4 In confidence interval calculations, sqrt(364) goes in the bottom for E; this has thrown off your intervals - too narrow; t should be negative in the hypothesis test, but your conclusion is correc ...

Please show the work to make it understandablea large

Please show the work to make it understandable A large company is interested in knowing whether there is any relationship between a person's age and that person's opinion about a new wage incentive plan. A random sample ...

Why is a z score a standard score why can standard scores

Why is a z score a standard score? Why can standard scores be used to compare scores from different distributions?

Exam - probability and stochastic modelspart a -q1 twelve

Exam - Probability and Stochastic models Part A - Q1. Twelve recruits were subjected to a selection test to ascertain their suitability for a certain course of training. At the end of training there were given a proficie ...

Consider the following belief space where the set of

Consider the following belief space, where the set of players is N = {I, II}, and the set of states of nature is S = {s 1 , s 2 }: Write out the belief hierarchies of orders 1, 2, and 3 of Player I, at each state of the ...

The department of education would like to determine if

The Department of Education would like to determine if there are gender differences in the performance of twins on the state mandated mathematics examination. As a result, they have collected data on twelve sets of twins ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen