Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Test the significant difference between the two population proportions.

Does lovastatin  (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of lovastatin group had suffered a heart attack, compared with 97 for the inactive pill.

a) State appropriate hypotheses.
b) Obtain a test statistic and p-value. Interpret the results at   = .01.
c) Is normality assured?
d) Is the difference large sufficient to be important?
e) What else would medical researchers require to know before prescribing this drug widely?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921823

Have any Question? 


Related Questions in Statistics and Probability

A study discovered that americans consumed an average of

A study discovered that Americans consumed an average of 10.3 pounds of chocolate per year. Assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.4 pounds. Complete p ...

Describe the mayan aztec and incan empires why did the

Describe the Mayan, Aztec and Incan Empires. Why did the Spanish have such rapid success against the Aztec and Inca empires?

Let x be the number of heads observed in five tosses of a

Let X be the number of heads observed in five tosses of a fair coin. Then, X fair dice are thrown. Let Y be the sum of the numbers showing on the dice. Determine the mean and variance of Y.

Can the sample standard deviations s1 and s2 be used in

Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2? 1. "Testing the Difference between Two Means." (Note: Please respond to only one of the following two bullete ...

For an alphabet consisting of 26 characters find the

For an alphabet consisting of 26 characters, find the following: (a) The number of possible 4-letter sequences (words) where the same letter can appear in the word more than once. (b) The number of possible 4-letter sequ ...

Statistics for premasters fall 2015 assignment - basic

Statistics for Premasters, fall 2015 Assignment - Basic terms and exploring data Q1. For each of the following statements, indicate whether they are true or false, why, and explain with an example. a) An interval-scale i ...

Nbspan experiment consists of rolling a pair of six-sided

An experiment consists of rolling a pair of (six-sided) dice and observing the sum. This experiment is repeated until the sum of 7 is observed at which point the experiment stops. Let be the random variable which represe ...

Suppose the iq scores have a bell-shaped distribution with

Suppose the IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation of 18. Using the empirical rule, what percentage of IQ scores are between 86 and 122?

Construct a 95 confidence interval for mu1-mu2 with the

Construct a 95 % confidence interval for μ1-μ2 with the sample statistics for mean calorie content of twobakeries' specialty pies and confidence interval construction formula below. Assume the populations are approximate ...

Suppose x is a vector of iid random variables where each

Suppose X is a vector of IID random variables where each element has some PDF,    Find an example PDF such that the median is a better estimate of the mean than the sample mean.

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate