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You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Because there is relatively little known about the drug, you plan to use a nondirectional alternative hypothesis. Since your resources are limited, you can test only 15 subjects. The subjects will be run in a repeated measures design and the data will be analyzed with the sign test, using a = 0.05 2 tail.
Refer to Exhibit 11-1. If the drug has a moderate effect on learning such thatPreal= 0.70, what is the probability you will detect the effect when doing your experiment.
80% of those who take a certification exam pass it. Assume binomial distribution applies. 15 people have registered to take the exam in June. What is the probability that exactly 12 of them will pass the test?
Explain the difference between standard deviation and standard error of measurement. Is one more effective than the other? Why? Give an example of the appropriate use of each
One measure of the risk or volatility of an individual stock is the standard deviation of the total return (capital appreciation plus dividends) over several periods of time. Al though the standard deviation is easy to compute, it does not tak..
If the results on a nationally administered introductory statistics exam is normally distributed with a mean of 100 points and a standard deviation of eight points determine the following: a. describe the graph of the distribution b. find at the Z sc..
What is the best predicted value for diastolic pressure given that a woman has a systolic level of 100 and use the Excel Analysis ToolPak to find the linear correlation coefficient for the systolic and diastolic measurements.
Wilco is a manufacturer in a mature cyclical industry. During the most recent industry cycle, its net income averaged $30 million per year with a standard deviation of $10 million (n=6 observations). Management claims that Wilco's performance during ..
A fair die is thrown 10 times. What is the probability of getting 6 in 4 throws?
1. The power of the t test increases with ____.2. Having just made what you feel is to be a Type II error, using an independent groups design and a t test analysis, which of the following might you do in the next experiment to reduce the probability ..
Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, NY, gets an average of 35.4" of rain each year with a standard deviation of 4.2". Assume the data is normally distributed.
What is the conditional probability that a student likes gospel music if we know that he or she likes country music?
Ten percent of the population is left-handed. A class of 1800 students is selected. Convert the binomial probability P(x ≥ 15) to a normal probability by using the correction for continuity. P(x ≤ 15.5) P(x ≥ 14.5) P(x ≥ 15.5) P(x
Use Analyze, Descriptive statistics, Frequencies to summarize nonmetric variables, and create a pie-chart for Year in college and create a histogram for IQ and include the normal distribution.
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