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A very large study of college freshman study habits found that the time (in hours) that freshman study each week is approximately normal with a mean 24 hours and standard deviation 8 hours. consider random samples of size 16 from the population of freshman. on the axes below, sketch curves representing the distribution of the original population and the sampling distribution of x for a sample of size n+16.
We know that the population variance is 16. Estimate the mean number of admissions per 24-hour period with a 95% confidence interval.
Findout the consumption level separating the bottom 45% to the top 55%. The September energy consumption levels for single family homes are found to the normally distributed with a mean
With mean 120 mmHg and standard deviation 20 mmHg. The mean systolic blood pressure for the sample was 126 mmHg. How likely is it that the results of this sample occurred?
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
What is the probability that all tree students pick a different card?
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
What is the expected value (expected profit) of producing an all weather tire? Of producing a high performance tire?
The relationship d = 5000 - 25p describes what happens to demand (d) as price (p) varies. The price can vary between $10 and $50. What is the mathematical expression for total revenue (TRV).
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
Identify the variable being measured and describe the sample as it relates to the population.
Create the 95% confidence interval for portion of respondents who feel president is doing a good job. Based on the intervalin part(a), It is sensible to conclude that majority.
Inspection of student data generated during pre/post treatment surveys shows that among 10 subjects, 7 had higher scores after an experimental treatment
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