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3. Circle your answer to each question. 1. A) Find PC Z b) (.68 c) The...
D. Cost of Personal Computers: The average price of a personal computer (PC) is S949. If...
D. Cost of Personal Computers: The average price of a personal computer (PC) is S949. If the computer prices are approximately normally distributed and σ-S100, what is the probability that a randomly selected PC costs more than $1200? The least expensive 10% of personal computers cost less than what amount? 41 Page
1) We know that z has a standard normal distribution with a mean of 0 and...
1) We know that z has a standard normal distribution with a mean of 0 and standard deviation of 1. The probability that z is less than 1.15 is . Use your z-table and report your answer to four decimal places. 2)A sample of 15 grades from a recent Stats exam has a mean of 69.3 points (out of a possible 100 points) and a standard deviation of 16.5 points. Calculate the z-score for the student who scored 74.1 points on...
1. According to Consumer Response Annual Report, millennials spent an average of $103 on monthly dining...
1. According to Consumer Response Annual Report, millennials spent an average of $103 on monthly dining in 2016. Let the amount spent on a monthly dining be normally distributed with unknown standard deviation. Assume that the probability of a randomly-selected millennial that spends more than $133 is 10%, and the probability that a randomly-selected millennial that spends less than $97 pounds is 40%. What is the probability that a randomly-selected millennial will spend between $73 and $109 on a monthly...
Answer all questions please!!! The mean gas mileage for a hybrid car is 56 miles per gallon. Supp...
answer all questions please!!! The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.2 miles per gallon. (a) What proportion of hybrids gets over 62 miles per gallon? (b) What proportion of hybrids gets 52 miles per gallon or less? left parenthesis c right parenthesis What(c) What proportion of hybrids gets between 58 and 62 miles per gallon? (d) What is the...
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with...
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than -0.864°C. P(Z<−0.864)= 2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find...
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with...
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than 1.089°C. P(Z<1.089)=P(Z<1.089)= (Round answer to four decimal places.) 2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is...
I. Assume that z is normally distributed with a specified mean and standard deviation. Find the...
I. Assume that z is normally distributed with a specified mean and standard deviation. Find the indicated probabilities: c, p(x 120); μ 100 ; ơ--15 2. Find z such that 28% of the standard normal curve lies to the right of z. 3. A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter of blood. After a 12- hour fast, the random variable x will have a...
The mean height of women in a country (ages 20-29) is 63.5 inches. A random sample...
The mean height of women in a country (ages 20-29) is 63.5 inches. A random sample of 50 women in this age group is selected. What is the probability that the mean height for the sample is greater than 64 inches? Assume o = 2.85. The probability that the mean height for the sample is greater than 64 inches is (Round to four decimal places as needed.) The height of women ages 20-29 is normally distributed, with a mean of...
15) Assume that z scores are normally distributed with a mean of 0 and a standard...
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
NO HANDWRITTEN ANSWERS PLEASE For the standard normal curve, find the z-score that corresponds to the...
NO HANDWRITTEN ANSWERS PLEASE For the standard normal curve, find the z-score that corresponds to the 30th percentile. Find the z-score for which 99% of the distribution’s area lies between –z and z. Assume that the heights of men are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches. If 64 men are randomly selected, find the probability that they have a mean height between 68 and 70 inches. An airline reports that it...
D. Cost of Personal Computers: The average price of a personal computer (PC) is S949. If the computer prices are approximately normally distributed and σ-S100, what is the probability that a randomly selected PC costs more than $1200? The least expensive 10% of personal computers cost less than what amount? 41 Page
I. Assume that z is normally distributed with a specified mean and standard deviation. Find the indicated probabilities: c, p(x 120); μ 100 ; ơ--15 2. Find z such that 28% of the standard normal curve lies to the right of z. 3. A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter of blood. After a 12- hour fast, the random variable x will have a...
The mean height of women in a country (ages 20-29) is 63.5 inches. A random sample of 50 women in this age group is selected. What is the probability that the mean height for the sample is greater than 64 inches? Assume o = 2.85. The probability that the mean height for the sample is greater than 64 inches is (Round to four decimal places as needed.) The height of women ages 20-29 is normally distributed, with a mean of...
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
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