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Question: A loans manager at a large bank believes that the percentage of her customers who default on their loans during each quarter is an approximately normally distributed random variable with mean 12.1% and standard deviation 2.5%. Give a lower bound x with 0.75 probability that the percentage of people defaulting on their loans is at least x. Also give an upper bound x' with 0.75 probability that the percentage of loan defaulters is below x'.
A fire insurance wants to examine the relationship between the amount of fire damage in major residential fires to the distance between the burning house and the nearest fire station. A sample of 15 recent fires in a particular city was taken.
Construct a 95% Confidence Interval of the population mean of minutes exercised per week.
Any pooled two-sample t problem can be run as a one-way ANOVA with I = 2. Explain why it is inappropriate to analyze the data using contrasts or multiplecomparisons procedures in this setting.
Is the speed of solving the problem different for people who get such instructions compared to the speed for people who are given no special instructions?
Reacting to risks. National newspapers such as USA Today and the New York Times carry many more stories about deaths from airplane crashes than about deaths.
a manufacturer of widget will accept a box of widgets is 10 of the widget are randomly selected without replacement
Which of the following is not true about the t-distribution?
Queries presented to a computer database are a Poisson process of rate λ = 6 queries per minute. An experiment consists of monitoring the database for m minutes and recording N(m), the number of queries presented. The answer to each of the followi..
1.a small college has 500 freshmen 400 sophomores 350 juniors and 300 seniors. they wish to conduct a survey of their
The number of new business registrations in the Gauteng region was recorded by the Department of Trade and Industries for the period 2007 to 2011.
a negative relationship between two variables means that as the x variable increases the y variable
if you want to be 95 confident of estimating the population mean to within a sampling error of plus or minus 6 and the
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