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A multiple choice test has three questions with 5 possible answers (and oly one right answer each). You decide to randomly guess the right answer.
A. What is the probability of getting the first question right?
B. what is the probability of getting the first two questions right?
C. What is the probability of getting all three questions right?
D. what is the probability of getting none of the questions right?
E. What is the probability of getting at least one of the questions right?
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
What sample size would be required to obtain the error of ±10 square millimeters with 99 percent confidence?
The simple coefficient of determination is the proportion of total variation explained by the regression line.
Suppose that nine additional firms will be added to the bankruptcy rolls during the next quarter. How many of those failures are likely to be attribute to fraud?
If wages were increased by $1.00, what is the expected effect on the number of complaints received per employee? How can you tell?
Probability based on binomial distribution - evaluate the probability of x successes in the n independent trials of the experiment.
An article in Parenting magazine reported that 60% of Americans needed a vacation after visiting their families for the holidays. Suppose this is the true proportion of Americans who feel this way. A random sample of 100 Americans is taken.
The useful life of an electrical component is exponentially distributed with a mean of 2500 hours. a. What is the probability the circuit will last more than 3,000 hours.
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
ABC Corp. is a firm with all-equity financing. Its equity beta is .80. The Treasury bill rate is 4 per cent and, and the market risk premium is expected to be 10 per cent. What is ABC's asset(equity) beta?
Find a 99% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.)
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