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Carry out a simulation experiment using a statistical computer package or other software to study the sampling distribution of x‾ when the population distribution is lognormal with E[ln(X)] = 3 and V[ln(X)] =
a. Consider the four sample sizes n = 10, 20, 30, and 50, and in each case use 500 replications.
For which of these sample sizes does the x‾ sampling distribution appear to be approximately normal?
1. Do this exercise by hand. A famous brand-name manufacturer wants to know whether people prefer Nibbles or Wribbles. They sample each type of cracker and indicate their like or dislike on a scale from 1 to 10. Which do they like the most?
The Medical College Admission Test
Use critical values to test the hypotheses you set up by setting a equal to .10, .05, .01, and .001. (3) Do we estimate that m is less than 4 or greater than 4?
A clinical trial is conducted comparing a new pain medication for arthritis. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes.
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less. To test this, he displayed the signs every ..
What can we say about the shape of the distribution of the sample mean?
State a research question for which a single-group post-test only design can yield relatively unambiguous findings.
Let "x" be a random variable from the standard normal distribution. Find the value of "K" for the following problems. (a) P(x=0)=K (b) P(x ≤ K)= 0.9
the pdf for 3 parameter frechet distribution is ltbrgtfxa?a x-?-a-1 exp-x-?-a ltbrgtthen how we can prove the cdf for
What is the difference between an experimental and a quasi-experimental design - How might break-even analysis help decision makers to deal with risk and uncertainty in utility analysis?
Thirty out of 167 students have been involved in a violent conflict in the past year. A) if 90 students reported a violent conflict, what is the standard error of the proportion?
The distribution of systolic blood pressure measurements for women over seventy-five.
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