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Q1) Class takes the exam where average time to finish the exam is normally distributed with a 40 minutes and standard deviation of 9 minutes. If class lasts 1 hour, what percent of students will have turned in exam after 60 minutes?
Q2) Following values represent population of home mortgage interest rates (in percents) being charged by banks in particular city:
6.9
7.5
6.5
7
7.3
6.8
7.2
7.8
6
Given this information, what would sampling error be if sample including seven values in top row were used to calculate sample mean?
a) Approximately 6.93
b) Out 0.56
c) Approximately -0.07
d) About 0.07
Make up a scatter diagram with 10 dots for each of the following situations:
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb.
Find out the best predicted household size given that the household discards 5.00 lb of plastic.
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30.
Explain why random samples are preferred to nonrandom samples.
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
The mean of a normal probability distribution is 60; the standard deviation is 5.
Solve different inventory control problems using an appropriate OR method.
If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
Calculate descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Calculate the value of beta for each stock.
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