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A study indicated that 41% of children ages 2 to 5 years had a good diet-an increase over previous years. How large a sample is needed to estimate the true proportion of children with good diets within 3% with 95% confidence?
Statistics and Probability, Statistics
Dave and Ellen are newly married and living in their first house. The yearly premium on their homeowner's insurance policy is $400 for the coverage they need. Their insurance company offers a discount of 8 percent if the ...
In a population of Ph.D students 50% have paid assistant ships. A random sample of n=200 students are chosen. What is the expected number of students who have paid assistant ships in this sample?
(NOTE: You will be limited to no more than 3 attempts for credit on this problem.) Rework problem 23 from section 4.1 of your text involving a basketball player's three point shooting. Assume that his shots are Bernoulli ...
Determine the sample size needed to construct a 90?% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.5. Assume the standard deviation of the GPA f ...
Assume the random variable x is normally distributed with a mean u=80 and a standard deviation o=4. Find the indicated probability. P(69 P(69 Round to four decimals places as needed.
Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 4%7%-2%40%0%10%-1% Stock Y 2%-5%7%4%6%11%-4% Consider a portfolio of 10% stock X and 90% stock Y. What is the (population) standard deviation of po ...
1) If there are 150 values in a data set, how many classes should be created for a frequency histogram? A. 5 B. 6 C. 7 D. 8 E. 9 2) . If x is a binomial random variable where n = 100 and p = 0.2, find the probability th ...
If the probability of either outcome A or outcome B arising during a single random process is 0.4 and we also know that the probability of outcome A is 0.2 while the probability of outcome B is 0.3, how are these two out ...
There is a new treatment for smokers to stop smoking. In an experiment, 85% of 300 smokers quit after 10 days of the treatment. What is the reasonable range for the success rate p of our new treatment? Which is the 95% c ...
A puck company wants to sponsor the players with the 20% quickest goals in hockey games. The times of first goals are normally distributed with a mean of 8.54 minutes and a standard deviation of 4.91 minutes. How fast wo ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As