The average test score on a statistics test was  84.2.   Assume the class had a normal distribution and the standard deviation for the class was  1.8.  A). What is the probability that a randomly selected student had a score greater than 86? B).  If the class had  30 students in it, what is the probability that the sample mean is greater than  83?

Q: Given a normal population whose mean is 665 and whose standard deviation is 24, find each of the…

A: The following information has been given: The population mean is μ=665. The population standard…

Q: Given a normal population whose mean is 325 and whose standard deviation is 73, find each of the…

A: GivenMean(μ)=325standard deviation(σ)=73

Q: he average annual salary for government employees in Manila is Php 125,000. Assume that the…

A: Comments: As per our guidelines we are supposed to answer only three subparts. Kindly repost other…

Q: a. How many standard deviations away from the mean is a beetle with mandible length of .44 mm? b.…

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: 3. The heights of 18-year old men are normally distributed with mean 68 inches and standard…

A: "Since you have posted a question with multiple subparts we will provide solutions only to the first…

Q: A radar unit used to measure the speed of cars on a highway follows a normally distribution with a…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Mean = 243 feet SD = 54 feet Find the value of z to get answers.

Q: rofessor wants to know if her Psychology statistics class has a good grasp of th. Six students are…

A: Given that  Sample size n=6 Population mean =70

Q: 2. Assume that, among residents of a large (over 6,000) Florida subdivision, the population mean age…

A: From the given information, The mean age is 65 and standard deviation is 2 years.

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: The Acme Company manufactures widgets. The distribution of widget eights is bell-shaped. The widget…

A: According to the given information in this question We need to answer two parts

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Consider X be a random variable which follows normal distribution indicates the distance of fly…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Let, X=the distance of fly balls hit to the outfield (in baseball) Given that X is normally…

Q: Given a normal population whose mean is 350 and whose standard deviation is 47, find each of the…

A: Let us denote the variable by X.  Given that X follows a normal distribution with mean= 350 and…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: .In university’s football team average weight of players is around (72) kg, and the standard…

A: Given Information: Heights of football team players are normally distributed. Mean μ=72  Standard…

Q: school conducted an IQ test to 32 randomly selected students. The standard deviation in the same…

A:

Q: iven the number of trials and the probability of success, find the mean, standard deviation, and the…

A: We know that  n= number of trials  p= success of probability  q=1 - p X~binomial ( n,p)

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: The lengths of lumber a machine cuts are normally distributed with a mean of 88 inches and a…

A: Given,Mean μ = 88Standard deviation σ = 0.6

Q: Given a normal population whose mean is 690 and whose standard deviation is 61, find each of the…

A: Answer The mean = 690The standard deviation = 61

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: 4. The systolic blood pressure reading for a person varies throughout the day. Assume that for a…

A: The normal distribution is used in statistics to calculate probabilities.

Q: Given a normal population whose mean is 435 and whose standard deviation is 37, find each of the…

A: Let X be the random variable from normal distribution with mean (μ) = 435, standard deviation (σ) =…

Q: 2. The average IQ of college students is 126 and the standard deviation is 15. 1. Determine the…

A: Given,Mean μ = 126Standard deviation σ = 15

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: GivenMean =253Standard deviation =45 a)Let X be distribution of distance of fly balls hit to…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Given a normal population whose mean is 320 and whose standard deviation is 58, find each of the…

A: Given, Mean, μ = 320Standard deviation, σ = 58Let X be a random variable which represents the normal…

Q: a. The standard deviation of 25 scores is 10, the mean is 29, the median is 24 and the mode is 23.…

A: Our aim is to find the coefficient of skewness. The formula for Coefficient of skewness is ,…

Q: d help with A,B,and C

A: Given: μ=500, σ=65  The corresponding z-value needed to be computed is: The probability that this…

Q: Suppose the average amount of money that people spend on their pets per month is 47 dollars, with a…

A: From the Standard Normal table, the bottom of 30% is -0.5244. The average amount of money spent on…

Q: c. If a random sample of thirty 18-year old men is randomly selected, what is the probability that…

A: X~μ=67,σ=3

Q: Given a normal population whose mean is 580 and whose standard deviation is 37, find each of the…

A: Given that  mean = 580 standard deviation = 37

Q: Find the probability that the mean weight of a sample of 25 bookbags will exceed 7 pounds.

A: Here use central limit theorem and standard normal distribution table for probability from z score

Q: e patient recovery time from a particular surgical procedure is normally distributed with a mean of…

A: GIVEN DATA, normal distribution μ=5.3σ=1.1we have to find out the given probabilties

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.