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Compute a 90% confidence interval of the mean for a Weschler intellegence test with mean of 100.00 and standard deviation of 15.00 for a sample of 100 people. Use two decimal places.
He argues that regression effect says people who do very poorly in their previous job tend to perform well in their next job. Is this what the regression effects? Describe in detail.
A recent national study showed that approximately 30% of college students binge-drink. Let x equal the number of students in a random sample size of n=12 who binge drink. Find the probability that
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
Let the following linear programming problem: Determine the optimal solution to this problem. Convert this problem standard LP form.
Consider the experiment of tossing a fair coin three times and observing the number of heads that result (X = number of heads).
Suppose that distribution of grades has average of 78 with standard deviation of 11. Find the appropriate cutoff points for the grades A and F.
Letting μ be the mean composite satisfaction rating for the gaming console, we find that the test should be H o : μ ≤ 42 versus H a : μ > 42
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholesterol levels, and then times each one while they wal..
I am writing a thesis and need a paired difference statistical analysis with a confidence level at 95% with t-value for alpha of 0.25
A survey found that at most 40% of those surveyed planned to get more sleep. A sample of 300 people found that 140 of them plan to get more sleep. For alpha = 0.01, what is the critical value?
When the purpose of sampling is to detect when a process becomes too variable the chart of choice will be a c-chart?
What are some critical decisions involved in selecting an appropriate measurment scale? How might these decisions influence the research design?
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