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Q1) Assume duration of human pregnancies follow mound-shaped distribution with mean of 266 days and the standard deviation of 16 days.
i) Approximately what percentage of human pregnancies last between 250 and 282 days?
ii) Between what two values will durations of 95% of all human pregnancy fall? Change these values to months (with decimals), suppose typical month has 30 day.
iii) Assume also that durations of horse pregnancies follow mound-shaped distribution with a mean of 336 days and standard deviation of 3 days. Is horse or a human more likely to have pregnancy that lasts within +- 6 days of its mean? Describe briefly."
Determine the sample size needed in order to be 99% confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.
Determine the probability that gas tank's capacity is above 15.25 gallons?
The researcher found that Lincoln's educational score did not correlate with the expected variables.
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
Write a one-page report to Ms. Gupta presenting your conclusions regarding the market performance of Brand 1.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
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.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
What is the probability that all three students pick exactly the same card?
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
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