The heights of 20-year old men are approximately normally distributed, with mean 68 inches and standard deviation 3 inches (based on information from Statistical Abstract of the United States, 112 edition) a) What is the probability that 20 year old men selected at random is between 67 and 69 inches tall? b) If a random sample of nine 20 year old men is selected, what is the probability that the mean height X is between 67 and 69 inches? c) Compare your answers for parts (a) and (b). Was the probability in part (b) much higher? Why would you expect this?

Q: The total energy needed during pregnancy is normally distributed, with a mean of 2600 kcal/day and a…

A: 1) A data is said to be quantitative data if it can be measured on numeric or quantitative scale.…

Q: Bomb

A: Given:μ = mean = 31 litersσ = standard deviation = 8.1 liters (a) The probability that daily…

Q: The amount of time working CHS students work per week is approximately normally distributed with a…

A: Suppose x : amount of time working CHS students work per week. a) Probability that a student works…

Q: The weights of ice cream cartons are normally distruted with a mean weight of 11 ounces and a…

A: Given the weights of ice cream cartons (X) are normally distruted with a mean weight, μ = 11 ounces…

Q: In the population, IQ scores are normally distributed with a mean of 100 and standard deviation of…

A: Given information: Population meanμ=100 Population standard deviationσ=15. Sample size(n)=21. Let X…

Q: A random variable follows the normal probability distribution with a mean of 115 and a standard…

A: Mean()=115standard deviation()=24

Q: 3. An election survey report result with state that the standard error of the mean ( standard…

A: Given that s.d =500 , standard error of mean =20

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: Mean(µ) = 55.5 Standard deviations (σ) = 3.1 X ~ N (µ, σ )= N ( 55.5, 3.1)

Q: Combined test scores were normally distributed with mean 1495 and standard deviation 348. Find the…

A: GivenMean(μ)=1495standard deviation(σ)=348

Q: Combined test scores were normally distributed with mean 1496 and standard deviation 341. Find the…

A: Given Data: Mean =1496 Standard deviation=341 To Find: The combines scores that, (a) 35th percentile…

Q: Exam grades: Scores on a stats final in a large class were normally distributed with a mean of 75…

A: Let X be the score on the Stat exam. X follows normal distribution with mean μ = 75 and the standard…

Q: Great Insurance company has collected the data regarding the duration (how long it takes) to settle…

A: Let us assume X=the duration (how long it takes) to settle insurance claims. Given that X follows a…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 264 days…

A: The mean is 264 and the standard deviation is 15.

Q: Two brands of car batteries, both carrying 6-year warranties, were sampled and tested under…

A: According to the Bartleby guidelines expert solve only one question and maximum three subpart of the…

Q: The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean…

A: Given information: Let the amount of calories that a customer consumes be denoted by X. Then X is a…

Q: Pregunta 2 Given a normal distribution with u = 100 and o = 10 what is the probability that (A) X >…

A: Here, µ = 100 and σ = 10.

Q: The lengths of lumber a machine cuts are normally distributed with a mean of 105 inches and a…

A:

Q: 1. Calgary monthly precipitation is nearly a normal distribution with mean of 59 mm and standard…

A:

Q: Combined test scores were normally distributed with mean 1492 and standard deviation 345. Find the…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A: given datanormal distributionμ= 105σ = 15P(x<120) = ?

Q: University dining services wants to know how satisfied students are with the robotic service. It…

A:

Q: The amount of time to complete a physical activity in a PE class is normally distributed with a mean…

A: c) Given  μ=37.3σ=5.5 P(33.7≤X≤40)=P33.7-μσ≤X-μσ≤40-μσ…

Q: Recently, the bowling scores of a certain bowler were normally distributed with mean 201 and…

A: As per our guidelines we are supposed to answer only subpart of any questions so i am solving first…

Q: Suppose the average IQ score is 101 with a standard deviation of 25. Assume this is a normal…

A: (a) Obtain the probability that their IQ is less than 80. The probability that their IQ is less than…

Q: The weights of cans of Ocean brand tuna are supposed to have a net weight of 6 ounces. The…

A: Given Mean=5.95 Standard deviation=0.24 N=45

Q: erage weekly earnings of the plumbers in a city are $932 with a population standard deviation of…

A: As the population standard deviation is known, it can be said that the distribution follows a normal…

Q: A random variable follows the normal probability distribution with a mean of 126 and a standard…

A: Here, mean is 126 and standard deviation is 21.

Q: Researchers have observed that regular smokers have an average life span of 68 years that is…

A: Let X be the random variable from normal distribution with mean (μ) = 68 and standard deviation (σ)…

Q: An index that is a standardized measure used in observing infants over time is approximately normal…

A: Note: Thank you for the question. Since multiple sub parts are posted, according to our policy, we…

Q: Earthquake tremors in a region occur 3.55 times every 30 days on the average. in the next 90 days,…

A: a) In every 30 days, the average is 3.55 In every 1 day, the average is 3.55/30  In every 90 days,…

Q: Jamaica Auto Service is a popular place for car service. It is also known that the mean time taken…

A: From the provided information, Mean (µ) = 15 Standard deviation (σ) = 2.5

Q: what is the empirical rule The distribution of heights of young men is approximately normal with…

A: About 68% of values fall within one standard deviation of the mean. About 95% of the values fall…

Q: -Assuming that age at death is a normal distribution; mean age at death is 74.1 with a std deviation…

A:

Q: Typed plz and asap thanks Wrong answer not accepted and AI answer not accepted

A: The objective of this question is to find the probability of a randomly chosen child having a height…

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: Solution

Q: a) What is the mean of the binomial distribution, rounded to two decimal places? b) What is the…

A: Let X be the random variable the no. of adults in the US.p be the population proportion of adults in…

Q: The bar graph below summarizes information aNew York City Survey of Elementary School Children(NYC…

A: If X is the number of children among 400 Hispanic NYC school children that are obese,then…

Q: Happy Cruise lines provides vacations for customers to various Caribbean destinations .The mean…

A:

Q: Combined test scores were normally distributed with mean 1494 and standard deviation 347. Find the…

A: From the provided information, Mean (µ) = 1494 Standard deviation (σ) = 347 X~N (1494, 347)

Q: Business  weekly conduct a survey of graduates from 30 top MBA programs on the basis of the survey…

A:

Q: The weights of adult individuals in a certain country are normally distributed with a population…

A: 1) Suppose the random variable x defines the weight of adult individuals in a certain country.