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

The time spentin days waiting for a kidney transplant for

The time spent(in days) waiting for a kidney transplant for people ages 35-49 can be approximated by the normal distribution, as shown in the figure to the right. (a) What waiting time represents the 99th percentile? (b) ...

Consider the following system of preferences recall that

Consider the following system of preferences (recall that the preferences of the women appear in the lower right side of each cell (read vertically) and the preferences of the men appear on the upper left side (read hori ...

1 why do researchers want the error variance in their data

1. Why do researchers want the error variance in their data to be small? 2. Why do researchers use meta-analysis?

Develop a research question that addresses one of the

Develop a research question that addresses one of the unknowns in the question: Positive interactions between the CEO and board members lead to enhanced and better performance of the Corporation . Address the following 1 ...

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?

Reading journal assignment stage iifor this portion of the

Reading Journal Assignment Stage II For this portion of the journal, you will create five journal entries, each addressing the prompts given below. Each entry will be one page in length, double spaced, with 12 point font ...

Statistics paperthe final paper provides you with an

STATISTICS Paper The Final Paper provides you with an opportunity to integrate and reflect on what you have learned during the class. The question to address is: "What have you learned about statistics?" In developing yo ...

Grear tire company has produced a new tire with an

Grear Tire Company has produced a new tire with an estimated mean lifetime mileage of 36,500 miles. Management also believes that the standard deviation is 5000 miles and that tire mileage is normally distributed. To pro ...

Answer questions a through e using the following

Answer questions (a) through (e) using the following information and output for multiple regression The production of car tires in any given year is related to the number of cars produced that year and in prior years. Su ...

Bob like peggy wants to know if his cookies are special but

Bob, like Peggy, wants to know if his cookies are special, but all he knows are the class average of 21.65 chips per cookie, and his own data for his 10 cookies: 12,14,15,12,12,13,17,15,15,22. Conduct all six steps of hy ...

  • 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