Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Multiple choice problems based on the test of single population mean.

1. Assume that in a hypothesis test with null hypothesis 0 μ H : = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of
i. The 95% confidence interval for the mean does not contain the value 13.0
ii. The 95% confidence interval for the mean contains the value 11.0
iii. There is insufficient information to conclude whether the 95% confidence interval for the mean contains or does not contain the value 13.0
iv. The 95% confidence interval for the mean contains the value 13.0

2. Nationwide, the average waiting time until electric utility customer service representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average, they answered in 240 seconds per call with the standard deviation of 50. Can the company claim that they are faster than the average utility?
a. No, because -0.20 falls in the critical region
b. Yes, because -7.10 falls in the critical region
c. No, because -1.20 falls in the critical region
d. Yes, because -0.20 falls in the critical region

3. If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to
a.-1.00
b.0.25
c.-0.25
d.1.00

4. Using the z table in Table E of Appendix C, what are the critical values for a two-tailed test while a = 0.03.
a.± 2.17
b.± 2.05
c.± 2.33
d. ± 1.88

5. The average speed of greyhound dogs is about 18.8 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 45 of her dogs, they ran, on the average, 19.2 meters per second with a standard deviation of 1.4. Is her claim accurate if she is willing to accept an error rate of 2.5 out of 100?
a. Yes, because 1.92 falls in the noncritical region
b. No, because 0.04 falls in the noncritical region
c. Yes, because 0.04 falls in the noncritical region
d. No, because 1.92 falls in the noncritical region

6. What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?
i.0.695
ii.2.179
iii.2.831
iv.2.201

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921979

Have any Question? 


Related Questions in Statistics and Probability

1 does the average iq for residents of a state vary with

1. Does the average IQ for residents of a state vary with the amount that the state spends on education? Seven of the 50 U.S. states were randomly selected. The amount that each spent per student (in thousands of dollars ...

1e model for a simple linear regression

1. Recall the model for a simple linear regression:  where  is Normally distributed with mean 0 and variance , where Cov( ) = 0 for all i, j and Cov(  = 0 for all i,j.A day trader wishes to develop a prediction model for ...

Determine the linear regression model to predict the cost

Determine the linear regression model to predict the cost of a house. Given that the 145 is the estimated mean value of Y when X is zero and 7.4 is the estimated mean value of Y for every one unit change in X.

Regression analysiscalculate then explaininterpret the

Regression analysis Calculate then explain/interpret the following 14 tasks/tests using the dependent variable (labeled Y)(Sales) and the independent variables (labeled X1 (Calls), X2 (Time), and X3(Years)). Attached is ...

What would the null and alternate hypothesis be for the

What would the null and alternate hypothesis be for, " The airlines claim that complaints average less than 15 per month per airport. To investigate the problem an independent watchdog agency contacted a random sample of ...

During a certain week the mean price of gas was 2709 per

During a certain week the mean price of gas was $2.709 per gallon. A random sample of 35 gas stations is drawn from this population. What is the probability that the mean price for the sample was $2.697 and $2.716 that w ...

Microsoft word - stat Microsoft Word - STAT Assignment 1.

Microsoft Word - STAT Assignment 1. Anationalrepresentativesurveyofstudentsingrades7-12askedaboutthe experience of these students with respect to sexual harassment. The students were asked whether or not they were harass ...

1 why are psychologists sometimes interested in

1. Why are psychologists sometimes interested in epidemiology? 2. Why do researchers use probability rather than nonprobability samples when doing descriptive research?

Let s sube rn be a closed and convex set and let x isin

Let S ⊆ Rn be a closed and convex set, and let x ∈ S. Find a hyperplane H(α, β) strictly separating x from S; i.e., x is in the interior of H +(α, β), and S is in the interior H -(α, β).

At a local college 316 of the male students are smokers and

At a local college, 316 of the male students are smokers and 474 are non-smokers. Of the female students, 70 are smokers and 630 are non-smokers. A male student and a female student from the college are randomly selected ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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