Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

1. Researcher is interested in if students who attend private high schools have higher average SAT Scores than students in the general population or not. Random sample of 90 students at a private high school is tested and mean SAT score of 1030 is obtained. Average score for public high school student is 1000 (σ= 200).

a. Is it one- or two tailed test?

b. Determine H0 and Ha for this study?

c. Evaluate Z obt

d. Determine Z critical value (Z cv ) using a 0.05 alpha level?

e. Should H0 be rejected? What should the researcher conclude?

f. Find the 95 % confidence interval for the population mean, based on the sample mean.

2. A researcher hypothesized that pulse rates of long-distance athletes vary from those of other athletes. He believed that runners’ pulses will be slower. He got a random sample of 10 long-distance runners. He measured their resting pulses. Their pulses were 45, 45, 64, 50, 58, 49, 47, 55, 50, 52 beats per minute. Average resting pulse of athletes in the general population is normally distributed with a pulse rate of 60 beats per minute. 

a. What statistical test should be used to analyze the data?

b. Is this a one- or two- tailed test?

c. What are H0 and Ha for this study?

d. Determine tcv from appendix A in Jackson’s text.

e. find out t obt

f. Should H0 be rejected? What must the researcher conclude?

3. A researcher hypothesizes that people who listen to music via headphones have greater hearing loss and would thus score lower on a hearing test than those in the general population. On standard hearing test, the overall mean for the general population is 22.5. Researcher gives this similar test to a random sample of 12 individuals who regularly use headphones. Their scores on the test are 15, 14, 20, 20, 25, 22, 21, 19, 16, 17, 21, 22.

a. Which statistical test should be used to analyze the data?

b. Is this a one- or two- tailed test?

c. Find H0 and Ha for this study?

d. find out t obt

e. Should H0 be rejected? What must the researcher conclude?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91563

Have any Question? 


Related Questions in Statistics and Probability

A caterer is competing for a companys business the caterer

A caterer is competing for a company's business. The caterer randomly selects a past client and submits a tasting menu consisting of all the dishes prepared for the past client. What type of sample is this? A college fac ...

A researcher evaluates a gun training program in a large

A researcher evaluates a gun training program in a large American city found that rapes dropped by 90% in the year following the training. Researchers looking at the same data but expanding the time frame to include 5 ye ...

I love juliet and i know that juliet loves me but i do not

I love Juliet, and I know that Juliet loves me, but I do not know if Juliet knows that I love her. Provide an Aumann model of incomplete information that describes this situation, and specify a state of the world in that ...

Describe the technologies that contributed to the

Describe the technologies that contributed to the development and advancement of the newspaper from small, infrequent circulations of a few brief pages to the mass production of daily, extensive pages of news.

In a study of smokers who tried to quit smoking with

In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment. We want to use a .05 significance level to ...

1 what does the reliability coefficient of a measure

1. What does the reliability coefficient of a measure indicate if it is .60? .OO? 1.00? 2. What does a correlation coefficient tell us? Why are correlation coefficients useful when assessing reliability? 3. What are the ...

Anbsppsychologist would like to examine the effects of a

A psychologist would like to examine the effects of a new drug on the activity level of animals. Three samples of rats are selected with n = 5 in each sample. The rats in the first sample serve as a control and do not ge ...

Electronic mail game let lgtmgt 0 be two positive real

Electronic Mail game Let L>M> 0 be two positive real numbers. Two players play a game in which the payoff function is one of the following two, depending on the value of the state of nature s, which may be 1 or 2: The pr ...

A using the table of critical values of t in appendix a-2

a. Using the table of critical values of t in Appendix A-2, find the critical value of t for an experiment in which there are 28 participants, using an alpha level of .05 for a one-tailed test b. Find the critical value ...

1 prove that every complete irreflexive and transitive

1. Prove that every complete, irreflexive, and transitive relation is asymmetric: if x ≠ y, then x > y if and only if y x. 2. Prove that the Gale-Shapley algorithm for finding a stable matching satisfies the following pr ...

  • 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