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A study has shown that the probability distribution of x, the numbers of customers in line(including the one being served, if any) at a checkout line counter in a dept store, is given by P(X=0)=0.25, P(X=1)=.25, P(X=2)=.20, P(X=3)=.20, and P(X≥4)=.10. Consider a newly arriving customer to the checkout line.
a) What is the probablility that this customer will not have to wait behind anyone?b) What is the probability that this customer will have to whit behind at least one customer?c) On average, behind how many other customers will the newly arriving customer have to wait?
At the 0.10 significance level, can we conclude that the annual rates of return are higher on the big board?
What is the mean of the sample means? e. What is the shape of the population distribution? f. What is the shape of the distribution of the sample mean? How do I pay the $20.
Market researchers would like to know if customers prefer a well-known brand over a generic brand of soft drink. They give a large sample of people the two drinks to taste in a random order and ask them which one tastes better.
For the past 20 years, the high temperature on April 15th has averaged (j = 62 degrees with a standard deviation of a = 8. Last year, the high temperature was 66 degrees.
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
The sum of two numbers is less then 27. The second number is 7 less then the first. What are the possible values for the first and second number
Of 1338 people who came into a blood bank to give blood, 253 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.
About 5.5 percentage points in either direction from what would have been obtained by seeking out all Ohio State University female students." Do your results agree with this statement?
Finding probability for the given values of the uniform density curve
Find a 99% confidence interval for the population mean number of weekly miles.
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
Standard deviation of 30 lb. Find the percentage of such weights between 190 lbs and 225 lbs. among 400 men aged 18 to 74, how many are expected to weigh between 190 lbs and 225 lb.
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