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The Journal of the American Medical Association reported on an experiment intended to see if the drug Prozac® could be used as a treatment for the eating disorder anorexia nervosa. The subjects, women being treated for anorexia, were randomly divided into two groups. Of the 49 who received Prozac, 35 were deemed healthy a year later, compared to 32 of the 44 who got the placebo.
a) Are the conditions for inference satisfied?
b) Find a 95% confidence interval for the difference in outcomes.
c) Use your confidence interval to explain whether you think Prozac is effective.
find the t-value with n 30 having area 0.05 to its
If a randomly chosen US household earns over 250, 000 per year, what is the probability it is from California?
a) Compute a 95% Confidence Interval for the true population proportion of successes. b) Based on this analysis can you conclude that the new system meets the requirement? Explain your conclusion.
The National Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses. Assume that a sample of 450 college students was used in the study.
Two discrete random variables have a joint PMF - Find the marginal PDFs, PM(m) and PN(n). - Find Pr(N= 1|M= 2). - Find Pr(M=N). - Find Pr(M> N).
rate data often follow a lognormal distribution. average power usage db per hour for a particular company is studied
State the direction of the alternative hypothesis used to test that the demand function is downward sloping. Type gt (greater than), ge (greater than or equal to), lt (less than), le (less than or equal to) or ne (not equal to) as appropriate in the ..
Find the value of q-hat from proportion and degrees of freedom used to find the t-score.
1. kane discusses the concentricity of an engine oil seal groove. historically the standard deviation for the
Assume that you have a binomial experiment with p = 0.5 and a sample size of 100. The expected value of this distribution is.
He must choose four of the six courses available in his major discipline and three of the four courses offered in related subjects - In how many ways can Prashad list his course choices? Explain the reasoning for your answer.
A large bank has 4500 accounts holders in a particular branch. The rupees amount of these accounts are known to be normally distributed with a mean of Rs. 60,000 and a standard deviation of Rs. 1000.
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