The number of pizzas consumed per month by university students isnormally distributed with a mean of 6 and a standard deviation of 5.A. What proportion of students consume more than 9 pizzas permonth?Probability =B. What is the probability that in a random sample of size 12, a totalof more than 48 pizzas are consumed?Probability =

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Cholesterol levels for women ages 20-34 are approximately normally distributed with a mean of 185 mg/dL and a standard deviation of 39. Cholesterol levels between 200 mg/dL and 240 mg/dL are considered borderline high. What is the probability that a woman between the ages of 20 and 34 has a borderline high cholesterol level (her cholesterol is between 200 mg/dL and 240 mg/dL)? a. 0.78435 b. 0.7273 c. 0.6480 d. 1.5687 e. 0.2727 f. 0.5454 g. 0.9207
The weight of 2,000 students are normally distributed with the mean of 46kg and standard deviation of 2.5kg.a. How many students are less than 45 kg?b. How many students are heavier than 51.85kg?c. If a student from this group is randomly selected, what is the probability that he/she/they weight between 44kg to 49kg?
The number of pizzas consumed per month by university students is normally distributed with a mean of 14 and a standard deviation of 5. A. What proportion of students consume more than 16 pizzas per month? Probability= B. What is the probability that in a random sample of size 10, a total of more than 160 pizzas are consumed? Probability =
CNNBC recently reported that the mean annual cost of auto insurance is 1050 dollars. Assume the standard deviation is 219 dollars, and the cost is normally distributed. You take a simple random sample of 8 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N 1050 b. What is the distribution of a? - N 1050 c. What is the probability that one randomly selected auto insurance is less than $996? 0.4013 d. a simple random sample of 8 auto insurance policies, find the probability that the average cost is less than $996. e. For part d), is the assumption of normal necessary? Yes No > Next Question 219 77.42
The number of pizzas consumed per month by university students is normally distributed with a mean of 6 and a standard deviation of 2. A. What proportion of students consume more than 9 pizzas per month? Probability = B. What is the probability that in a random sample of size 12, a total of more than 60 pizzas are consumed? Probability =
The annual per capita consumption of bottled water was 30.5 gallons. Assume that the per capita consumption of bottled water is approximately normally distributed with a mean of 30.5 and a standard deviation of 13 gallons. a. What is the probability that someone consumed more than 36 gallons of bottled water? b. What is the probability that someone consumed between 30 and 40 gallons of bottled water? c. What is the probability that someone consumed less than 30 gallons of bottled water? d. 99.5% of people consumed less than how many gallons of bottled water? Instructor tip - X a. The probability that someone consumed more than 36 gallons of bottled water is 0.3361 (Round to four decimal places as needed.) b. The probability that someone consumed between 30 and 40 gallons of bottled water is 0.2829 (Round to four decimal places as needed.) Use Excel functions or the normal probability applet: https://davidmlane.com/hyperstat/z_table.html c. The probability that someone consumed less…
The number of pizzas consumed per month by university students is normally distributed with a mean of 11 and a standard deviation of 2. A. What proportion of students consume more than 14 pizzas per month? Probability = B. What is the probability that in a random sample of size 8, a total of more than 80 pizzas are consumed? Probability =
The number of pizzas consumed per month by university students is normally distributed with a mean of 10 and a standard deviation of 4. A. What proportion of students consume more than 13 pizzas per month? Probability = B. What is the probability that in a random sample of size 9, a total of more than 99 pizzas are consumed? Probability = %3D
Heights of 10-year-old, regardless of sex, closely follow a normal distribution with mean 55 inches and standard deviation 6 inches. A. What is the probability that a randomly chosen 10-year-old is shorter than 48 inches? B. What is the probability that a randomly chosen 10-year-old is between 60 and 65 inches?
The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting307days or longer. b. If the length of pregnancy is in the lowest33%,then the baby is premature. Find the length that separates premature babies from those who are not premature
The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 days longer. b. If the length of pregnancy is in the lowest 2%then the baby is premature. Find the length that separates premature babies from those who are not Premature
The annual per capita consumption of bottled water was 30.8 gallons. Assume that the per capita consumption of bottled water is approximately normally distributed with a mean of 30.8 and a standard deviation of 13 gallons. a. What is the probability that someone consumed more than 41 gallons of bottled water? b. What is the probability that someone consumed between 25 and 35 gallons of bottled water? c. What is the probability that someone consumed less than 25 gallons of bottled water? d. 99.5% of people consumed less than how many gallons of bottled water? a. The probability that someone consumed more than 41 gallons of bottled water is (Round to four decimal places as needed.) b. The probability that someone consumed between 25 and 35 gallons of bottled water is (Round to four decimal places as needed.) c. The probability that someone consumed less than 25 gallons of bottled water is (Round to four decimal places as needed.) d. 99.5% of people consumed less than (Round to two…

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