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A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours. Show all work. Just the answer, without supporting work, will receive no credit.
(a) Find the 80th percentile for the distribution of exercise time per week. (round the answer to 2 decimal places)
(b) What is the probability that a randomly selected adult has more than 7 hours of exercise per week? (round the answer to 4 decimal places)
Six people have declared their intentions to run for a county commission seat in the next general election. A political poll is conducted three-quarters of the way into the campaign to determine if there are any clear preferences on the part of th..
X(t)is a wide sense stationary process with µX = 0 and Y(t) = X(αt) where α is a nonzero constant. Find RY(τ ) in terms of RX (τ ). Is Y(t) wide sense stationary? If so, find the power spectral density SY ( f ).
Give an example of some data that you could analyze with a Chi Square. Discuss the level of measurement that you would need to use this test.
A student receives test scores of 62, 83, and 91. The student's final exam score is 88 and homework score is 76. Each test is worth 20% of the final grade, the final exam is 25% of the final grade, and the homework grade is 15% of the final grade...
The following numbers are observations on tensile strength of synthetic fabric specimens selected from a production process at equally spaced time intervals.
Many people believe that abnormal behavior is more likely to occur during a full moon. As a test for empirical evidence to support this belief, a study was conducted based on admission of new clients over a one year period by lunar phases:
A sample of 100 mortgages approved during the current year showed that 31 were issued to a single-earner family or individual. The historical average is 25 percent.
Do the confidence interval limits contain 98.6F? What does the sample suggest about the use of 98.6F as the mean body temp.
Determine probability of waiting less than 12 minutes between successive speeders. By using cumulative distribution function of X.
Problem: Find the probability and interpret the results. If convenient, use technology to find the probability. During a certain week the mean price of gasoline was $2.707 per gallon. A random sample of 38 gas stations is drawn from this populatio..
A sample of farms is $1200, with a standard deviation of $350. Assume the data set has a bell-shaped distribution. Between what two values do about 95% of the data lie?
If you were to accept the null hypothesis, even though the null hypothesis was false, what type of error would you have commited?
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