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If one person is selected at random from these young ones, find the probability that this person is employed given that the person is male.
The mean and standard deviation for the quality point averages of a random sample of 36 college seniors are calculated to be 2.6 and 0.3
In studying the behavior of air support roofs, the random variables X, the inside barometric pressure (in inches of mercury) and Y, the outside barometric pressure are considered. Assume that the join
The applicants require to take the university examination for admission in engineering collage. Scores on the university are roughly normally distributed with a mean of 530 and a standard deviation of
Detailed description of -the mean deviation about for the numbers 4/11, 6/11, 8/11, 9/11, 12/11. 8/11 is and 2nd question is the mean and SD for a,b and 2 are 3 and 2/sqrt3 respectively. The valu
To examine the effectiveness of its four annual advertising promotions, a mail order company has sent a questionnaire to each of its customers, asking how many of the previous year's promotions prompt
The advertising firm of McMann and Tate has put out bids for two separate contracts. Based on past experience, they believe that they have a 0.7
Suppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 570 and a standard deviation of 170.
A 12 ounce bottle of beer has 355 ml. The Random Brewing Company sets its machinery so that the contents of a bottle is normally distributed with a mean of 355.5 ml and a standard deviation of 1 ml. (
If the mean is 24 inches and the SD is 4.5 inches, What is the height of a plant with a z score of 0? My question is what is the formula used to solve this?
The probability that husband and wife will b alive after 20 years from now is 0.8 and 0.9 respectively.find the probability that in 20 years time 1. both will b alive 2. neither of them will b alive 3
Three vehicles with a carrying capacity of 12 passengers each are used to ferry 30 international tourists and 5 local tourists from or tambo airport to vilakazi street,soweto. if the logistics manager
In a BMT class test the scores of 8 students are: 11; 10; 6; 3; 11; 10; 9; 11. Assume the sores are a simple random sample from a normally distributed population. What is the point estimate of the sta
The mean serum cholesterol level of 25 men ages 65-74 is 231, with a sample standard deviation of 50. For 25 women of the same age, the mean serum cholesterol level is 255 with a standard deviation of
The heights of 20- to 29-year-old females are known to have a population standard deviation 1) = 2.7 inches. A simple random sample of n = 15 females 20 to 29 years old results in the follow
Test whether there is any change in IQ after the training program. (The absolute value of t for 4 degrees of freedom at 1% level for one-tailed and two tailed tests are 3.747 and 4.604 respectively.
The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds. find the probabality that a random collection of 16 songs will
Assume that a random sample is used to est. a population proportion p. find margin of error E that corresponds to the given statistics and confidence level. 98% confidence sample size 1166 of whic are
The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds.
Find the z-scores that bound the middle 15% of the standard normal distribution. (Give your answers correct to two decimal places.
Some national statistics indicate the self-reported number of minutes per week of exercise is μ = 96.8 among college students. At the University of Wisconsin
If you choose 12 vehicles at random, what is the probability that more than half(that is, 7 or more) carry just one person?)create a probability distribution table and a cumulative distribution.
A manufacturer of small appliances purchases coffeepot handles from an outside vendor. If a handle is cracked, it is considered defective and can't be used
A researchers wish to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows the 40% of those interviewed had a computer at home.
You are conducting a study on what socio-demographic factors could be behind the behavioral problems of students. You are looking at how many times a student was sent to detention. You have informatio