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The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Statistics and Probability, Statistics
A social psychologist recently developed a childhood memories test that is intended to measure how people recall pleasant and unpleasant memories from childhood. Scores on this test range from 1 (very unpleasant) to 100 ...
A school district is trying to estimate the proportion of students at the high school who would eat a school breakfast if the cafeteria were opened to students at 6 am. A new employer opened up within the district and th ...
In a poker hand consisting of 5 cards find the probabilty of holding 2 aces and 3 jacks In how many ways can you pick 5 different questions from a test bank contsisting of 15 questions? 3 dice are thrown find the probabi ...
The probability of a California teenager owning a surfboard is 0.43, of owning a skateboard is 0.38, and of owning both is 0.28. If a California teenager is selected at random, find the probability that he or she owns a ...
A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 35, how many individuals were in the sample?
Bob is interested in studying whether the average household income in city A is lower than the national benchmark, μ 0 = $51,500. He collects income information from a random sample of 100 households, conducts a one-sam ...
You roll a pair of dice ONE time. Let Event A be the dice show an odd sum. Let Event B be exactly one of the dice (not both of them) shows a one. b. What is the symbol for the complement of B? ______ c. Describe the comp ...
A political researcher wants to determine if there is an association between gender (male, female) and political party affiliation (Democrat, Republican, Independent). What type of statistical test should be used?
6 year, 8% coupon bond with semi annual payments, Par Value = $1000. 1) Find out price of the bond if YTM = 10%. 2) What happens to the bond price if YTM decreases 1 basis point? 3) Is the effect of 1 basis point decreas ...
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 ...
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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