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The sample to be 99% sure the sample mean is with 1 semester hour of the population mean for all students at this college? There should be more included in the sample to meet the requirement.
A DMS source X = { xi }; i = 1, 2, 3 produces its alphabet with unequal probabilities: P(x1) = 0.45; P(x2) = 0.35; and P(x3) = 0.2. If the symbols are taken in blocks of 2 symbols in one block. Answ
Suppose that the distribution of calories is approximately normal with o = 10. Find the probability that a randomly selected chocolate bar will have a) Between 200 and 220 caloies.
Assume the probability that a person has the desease is 0.03 for all people, independently of each other. Compute the total expected number of tests necessary.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Assume the arrival of these emails is approximated
Suppose we have a set of blood pressures with a mean of 110 Systolic, and a sample standard deviation of 20 points. If we assume a normal distribution of Systolic blood pressures, then between what
A sample of 64 past customers is taken and the average delivery time is 16.2 days with a standard deviation of 5.6 days. Test the company's advertised claim using alpha=0.01.
Determine whether or not the average age of the population of evening students is significantly different from 21. Use Alpha= 0.05
Organize the data into a frequency distribution and include the relative frequency distribution.
Find the 95% Confidence Interval for the proportion of the home mortgages that had inflated home appraisals. State the Null and the Alternative hypothesis conduct the test and state your conclusion in
Big Rapids local police department must write, on average, 6 tickets a day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distributio
assuming that disease A afflicts 50 births per year at a given hospital, find the probability that more than 40 babies are born with disease A this year.
What is the probability that the mean diameter of an SRS of 9 axles differs from the target value by 0.01 mm or more (in either direction)?
The local police department must write, on average, 5 tickets a day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with
What is the probability that (a) the birthdays of twelve people will fall in twelve di?erent calendar months (assume equal probabilities for the twelve months).
The unemployment rate in a city is %. Find the probability that fewer than out of people from this city sampled at random are unemployed. Round your answer to four decimal places.
A student scored 84 points on a test where the mean score was 79 and the standard deviation was 4. what the student's z score was ?
The staff at a small company includes: 4 secretaries, 20 technicians, 4 engineers, 2 executives, and 50 factory workers. If a person is selected at random, what is the probability that he or she is
Why is statistical significance not necessarily of practical important difference to a business decision? Provide an example and explain. Why do statisticians play only a limited role in deciding wh
A management trainee is selected at random. What is the probability that the person selected is a female who did attend college?
A business has seven locations to choose from and wishes to rank only the top three locations. How many different ways can this be done?
An uniform distribution over an interval from 0 to 90 minutes what is the probability that the line interval between two consecutive defective lights will be less than 10 minutes.
If 25 tickets are sold and 2 prizes are to be awarded, find the probability that one person will win both prizes if that person buys exactly 2 tickets.
1. Construct a 95% confidence interval estimate of the difference between the percentage of men and the percentage of women who fear flying. Do the confidence interval limits contain 0, and what is
The average hourly wage of workers at a fast food restaurant is $6.50/hr with a standard deviation of $0.45. Assume that the distribution is normally distributed. If a worker at this fast food resta