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The Internal Revenue Service estimates that 7% of all taxpayers filling out forms make mistakes.
An IRS employee randomly selects and checks 10 forms for mistakes. What is the probability that exactly one has an error?
Round answer to 4 decimal places
The same IRS employee announces at lunch one day that she is going to check 25 randomly selected forms after lunch. Calculate the mean number of mistakes she should expect to find, and show all of your work leading up to your answer.
What is the probability that there are zero mistakes in 25 randomly selected forms?
If a worker finds 0 mistakes, does this provide convincing evidence to cause her supervisor to believe that she is missing mistakes? Explain.
The weight of a one cubic yard bag of landscape mulch is normally distributed with a mean of 40 pounds and a standard deviation of 2 pounds. What is the probability that a bag will weigh less than 40 pounds?
a. Determine the? person's health care expenses for the year with the insurance policy.
1 you are sending out 60 invitations to a party.each person can bring a guest if they wish. suppose its equal probable
Assume a random sample of 16 gasoline stations is selected and their mean cost for regular gasoline is computed. What is the standard error of the mean in this experiment?
Evaluate the hypothesis that this new steroid hormone decreases blood glucose levels. Use an a-level of 0.05 for this analysis.
a die is continuously rolled until the total sum of all rolls exceeds 250. what is the probability that at least 70
Using probability: How can you use probability to improve your chances of winning at a casino. Provide specific examples using concepts learned in this module
Figure 20.3 shows CCW's average daily call volume for each quarter of the past three years, and column F of Fig. 20.4 gives the seasonally adjusted call volumes.
What is the equivalent annual cost of investing in the cheap system?
Consider a set of n independenttrials in which there are r possible outcomes s1,...,sr for each trial. In each trial, P[si] = pi. Let Ni equal the number of times that outcome si occurs over n trials. What is the joint PMF of N1,..., Nr?
Do hotel managers on average vary significantly in femininity score from men in general?
What is a chi-squared test used for? What is the typical null and alternate hypothesis when doing a chi-squared test?
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