Depression is one of the most commonly diagnosed conditions, Ask an Expert

Statistics

Depression is one of the most commonly diagnosed conditions among hospitalized patients in mental institutions. The primary measure of depression is the CES-D scale developed by the Center for Epidemiologic Studies, in which each person is scored on a scale of 0 to 60. The following results were found for a group of randomly selected women: n = 200, x = 10:4, and s = 10:3.

A study is now considered to investigate the effect of a new drug aimed at lowering anxiety among hospitalized patients in similar mental institutions. Subjects would be randomized to receive either the new drug or placebo, then averages of CES-D scores will be compared using the two-sided two-sample t test at the 5% level. How large should the total sample size be if it is important to detect a CES-D score reduction of 3.0 with a power of 90%?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91624258

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Next time you see an elderly man check out his nose and

Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger throughout our lifetime. In o ...

Five percent of the eyeglasses sold at an optical retailer

Five percent of the eyeglasses sold at an optical retailer have tinted lenses. Forty pairs of glasses are sold on a particular day and six have tinted lenses. Identify n, p, and x.

Calculate the rate of return available to shareholders for

Calculate the rate of return available to shareholders for a company financing $1 million of assets with the following three arrangements: i. all equity ii. 50 percent equity and 50 percent debt at an interest rate of 12 ...

A using an hp 12c calculator what are the correct steps to

a) Using an hp 12c calculator, what are the correct steps to calculate IRR entered as monthly payments and if summed up for a year? b) Using an hp 12c calculator, what is the best way to calculate effective interest rate ...

Can anyone tell me how the margin of error and the level of

Can anyone tell me how the margin of error and the level of confidence are related to one another in statistics?

A bottle of water is supposed to have 20 ounces the

A bottle of water is supposed to have 20 ounces. The bottling company has determined that 98% of bottles have the correct amount. Which of the following describes a binomial experiment that would determine the probabilit ...

In 2015 caterpillar inc had about 653 million shares

In 2015, Caterpillar Inc. had about 653 million shares outstanding. Their book value was $32.3 per share, and the market price was $74.00 per share. The company's balance sheet shows that the company had $20.20 billion o ...

What are the ways that it can help comply with legal

What are the ways that IT can help comply with legal requirements and social responsibilities surrounding the sales of alcohol?

A coin is biased so that the probability of obtaining heads

A coin is biased so that the probability of obtaining heads is ¾, What is the probability of obtaining at least three heads in four tosses of the coin?

If the lengths of male skis and female skis are used to

If the lengths of male skis and female skis are used to construct a? 95% confidence interval for the difference between the two population? means, the result is 14.32cm

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

Recent Questions

Ask Statistics and Probability Expert