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The distribution of the number of hours slept on school nights for students at a local high school has a mean of 6.3 hours and a standard deviation of 0.81 hours. Suppose we select a random sample of 75 students at the high school. Let - the sample mean number of hours slept for students in your sample. What is the standard deviation of the sampling distribution of a?
Using your result obtained in g, derive for each sample in your population of samples (cf., result obtained in d) a 90% confidence interval.
Assuming a 5.15% annual rate of return, compounded quarterly, how much interest would a person earn in a savings plan that has an initial deposit.
Four friends, Janice, Barbara, Kathy and Roberta, decided to carpool together to get to school. Each day the driver would be chosen by randomly selecting.
You find a zero coupon bond with a par value of $10,000 and 23 years to maturity. The yield to maturity on this bond is 4.5 percent.
Calculate IRRs for A and B. (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)
A survey of 51 randomly selected students finds that on average students study 138 minutes per night with a standard deviation of 32 minutes. What conclusion can be made from this data?
a. Perhaps ALS is related to heavy physical exercise, and therefore not related particularly to soccer.
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
What is the UPPER bound for the confidence interval?
Find the probability of at least 4 girls in 8 births. Assume that male and female births are equally likely and that the births are independent events.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
What types processes or procedures support project management, continuous improvement and innovative initiatives?
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