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A telephone company claims that 90 percent of the time when customers call for directory assistance, the customer is given the correct number. If 10 customers call directory assistance for help with telephone number, what is the probability that NONE of them will be given the wrong number?
Run the simulation model for Hammondsport Savings Bank's single ATM machine with the following assumptions: 1. Interarrival time between two customers is a uniform probability distribution
The heights of adults in one town have a mean of 66.3 inches and a standard deviation of 3.3 inches. What can you conclude from Chebychev's theorem about the percentage of adults in the town whose heights are between 59.7 and 72.9 inches..
If the population mean for how much alumni spend is $115.50 per week eating out socially, what is the mean and standard deviation for the sampling distribution of x?
Identify a business research topic and define the research questions for the identified problem or opportunity
Suppose an unrelated 77-year old man, 76 - year old woman, and 82- year old woman are selected from a community. What is the probability that all three of these individuals have Alzheimer's disease?
One school found that 28.6% of all students are liberal. You wonder whether this percentage is different at your school, but don't know whether it's higher or lower. What hypotheses will you test to see if your school significantly differs from th..
Which statement about re-expressing data is not true? I. Unimodal distributions that are skewed to the right will be made more symmetric by taking the square root of the variable.
Compute a 99% confidence interval for the true average number of months taken by bankruptcy petitioners to acquire debts listed on their petitions.
With a standard deviation of 0.5. At a .05 significance level, can we conclude college students watch fewer videos per month than high school students?"
A coin is flipped e times and heads (h) or tails (t) are recorded:
if you pick a card at random from a well-shuffled deck what is the probability that you get a spade or a
Compute test statistic for sample data that you would use to test whether sample mean varies from population mean of 10 pounds at a 5 percent level of significance in two-tailed test.
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