Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Does lovastatin (a cholesterol-lowering drug) minimize the risk of heart attack? In the Texas study, researchers gave lovastatin to 2,325 people and the inactive substitute to 2,081 people (average age 58). After five years, 57 of lovastatin group had suffered heart attack, compared with 97 for the inactive pill.

(a) State appropriate hypotheses.    

(b) Obtain test statistic and p-value. Interpret results at α = .01.

(c) Is normality assured?

(d) Is the difference large enough to be significant?  

(e) What else would medical researchers require to know before prescribing this drug widely?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921338

Have any Question? 


Related Questions in Statistics and Probability

A population of lawnmowers life expectancy is described

A population of lawnmowers' life expectancy is described with a Weibull distribution, where α=1 and β=15. Determine 1× (once) and 2× (twice) the expected mean lifes for the population, as well as their corresponding cumu ...

Consider a normal population with mu 47 and sigma 6

Consider a normal population with μ = 47 and σ = 6. Calculate the z-score for an x of 46.3 from a sample of size 26. (Give your answer correct to two decimal places.

Use the given degree of confidence and sample data to

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. Round to three decimal places. n=74, x=12; 95% confidence.

Assignment1 assume the speed of vehicles along a stretch

Assignment 1. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph. The current speed limit is 65 mph. a. What proportion o ...

A study found that consumers spend an average of 24 per

A study found that consumers spend an average of $24 per week in cash without being aware of where it goes. Assume that the amount of cash spent without being aware of where it goes is normally distributed and that the s ...

In a health insurance experiment performed in a super

In a health Insurance experiment performed in a Super Specialty Hospital 4 types of insurance categories patients are expected to occur in the proportion of 9: 3: 3: 1. The observed frequencies are 891 Insured and Surgic ...

Researchers use hierarchical regression cross-lagged panel

Researchers use hierarchical regression, cross-lagged panel designs, and structural equations modeling to partly resolve the problems associated with inferring causality from correlation. a. Describe how each of these an ...

1 if the calculated value of t is less than the critical

1. If the calculated value of t is less than the critical value, do you reject or fail to reject the null hypothesis? Explain. 2. If you reject the null hypothesis (and conclude that the independent variable has an effec ...

If 2 of the calls received by schools switchboard are wrong

If 2% of the calls received by schools switchboard are wrong numbers. Find the probability that among 210 calls received by schools switchboard, 4 will be wrong numbers. a). Determine in this case whether the conditions ...

1 why can it be argued that the formula for calculating r

1. Why can it be argued that the formula for calculating r should be named the Edgeworth, rather than the Pearson, correlation coefficient? 2. Why may we not interpret or discuss a correlation coefficient that is not sta ...

  • 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