John wishes to estimate the population mean salary of college graduates who took a statistics course in college. How many college graduates must he survey? Assume that the population standard deviation is known to be $1,633, and he wants to be 98% confident that the sample mean is within $107 of the true population m

Q: Assume that scores on a trivia challenge test were distributed normally, with an average score of 70…

A: Given data, μ=70σ=6

Q: The average travel time to work for a person living and working in Kokomo, Indiana is 17 minutes. I…

A:

Q: An agronomist measured the height of 115 Canola plants. The mean height was 242 cm and the standard…

A: The mean is 242 cm and the standard deviation is 14 cm.

Q: Use the following data to answer A&B.  The test scores for a sample of five randomly chosen…

A:

Q: The average test score in a particular class is m=30. If you scored a 40 and the class (sample)…

A: Introduction: Denote the score of a randomly selected student in a class as X. It is given that the…

Q: Assuming that the heights of college women are normally distributed with mean 64 inches and standard…

A: Given: μ=64 inchesσ=1.8 inches We have to find 1. what percentage of women lies between 62.2 inches…

Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Margin of error: A margin of error is a statistical measurement for the diff. between actual and…

Q: a. A student whose grade is 83 would be at the 19th percentile. b. A student whose grade is 90 would…

A: According to our guidelines, we can answer only three subparts, so please repost the rest parts.

Q: Suppose a population of individuals has a mean weight of 160 pounds, with a population standard…

A: Solution: Let X be the weight of individuals. From the given information, X follows normal…

Q: A test is normally distributed with a mean of 70 and a standard deviation of 8. (a) What score would…

A: a What score would be needed to be in the 58th percentile. Therefore, the score at 85th percentile…

Q: e a sample of 25 hamburgers and weigh them, we find that the mean is 0.57 pounds and the standard…

A: Given that  (a) sample size (n) =25     Sample mean (x¯) = 0.57 pounds     Standard deviation (s)…

Q: The scores on an aptitude test are normally distributed with a mean of 18 and standard deviation of…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: Dougal is filling out college applications that require either a SAT math score or ACT math score.…

A: Given Information: Dougal has an SAT math score of 610 and an ACT math score of 27. Mean SAT math…

Q: Suppose that your class took a test and the mean score was 86% and the standard deviation was 4%.If…

A: It is given that the mean is 86 and standard deviation is 4.

Q: use the following information for the question. The average travel time to work for a person living…

A: Let X denote the distribution of travel time and it follows normal distribution with mean of μ=17…

Q: Which of the following values for the population standard deviation would cause a score located…

A: Higher the standard deviation more will be the spread of the data. And the point will be farther…

Q: The average expenditure on Valentine's Day was expected to be $100.89  (USA Today, February 13,…

A: Given that ,The Average expenditure of 54 male consumers =$133.56The Average expenditure of 34…

Q: A sample of weights (in pounds) for six 12-year-olds is given below:   97 75 91 83 80 96   Find…

A:

Q: A distance is measured as 27.3 inches and 15.6 inches with the standard deviation (error) of 0.16…

A: Given information- We have given the mean and the standard deviation. E(X) = 27.3 inches E(Y) = 15.6…

Q: In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally…

A:

Q: he average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006).…

A: Given that  he average expenditure on Valentine's Day was expected to be $100.89  Male   Female…

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: Given,mean(μ)=50standard deviation(σ)=8

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A: Sample size: Sample is the part of the population that will help us to draw the inference about the…

Q: A sports shop records the sales of items made in India and those made in Australia. Country of…

A: The standard deviation is the measure of variability from individual data values to the mean and…

Q: "The weights of 1,000 children, in average, is 64kg with standard deviation of 18kg. Suppose the…

A: Given that n=1000, mu =64 ,s.d =18 ,p(x<59 ) =?

Q: An accountant is studying the attendance levels at the concerts of a touring rock band. She finds…

A: Let x¯ be the mean number of attendees at a performance in her study for 62 performances which…

Q: A pharmacologist measured the concentration of dopamine in the brains of several rats.The mean…

A: Mean = 1269 Standard deviation = 145

Q: If the weights of newborn babies are normally distributed with a mean of 2950 grams and a standard…

A: Given, X~Nμ,σ  where μ=2950 grams    and σ=340 gramsfind P(x<2610)=?

Q: Calculate both the sample and the population standard deviations using the data below. x | 20 25 |…

A:

Q: Suppose​ 30% of the people in your town talk on their cell phones and drive at the same time. If you…

A: we have to find standard deviation.

Q: 4. Compute the average deviation on the data below Test scores X-Х bar Xi 57 60 65 70 78 s0 82 85…

A: 4. Formula for Average deviation is, Average deviation=∑x'n Where x'=x-x¯ x¯=∑xin  , n=10…

Q: Past experience indicates that the standard deviation in the time it takes for a “fast lube”…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: We have given that mean = μ = 50standard deviation = σ = 8 z = 0.25

Q: For a sample of n = 25 scores, what is the value of the population standard deviation necessary to…

A: Given that, Sample size n=25

Q: On a measure of artistic ability, the men for college students in new zealand is 150 and tthe…

A: Given mean = 150Standard deviation = 25The Z score is calculated using the below mentioned formula…

Q: If a data value has a z-score of 3.00 and the mean of the distribution is 100 with a standard…

A: 1) Given data, z=3 μ=100 σ=15 X=?

Q: Given that X is normally distributed with a mean of 50 and a standard deviation of 4, determine P(45…

A:

Q: b. There were 218 players in the National Lacrosse League in 2013. Assuming the mean and standard…

A: Assume, X be the random variable representing the weight of players (in lbs). It can be assumed that…

Q: John wishes to estimate the population standard deviation of salary of college graduates who took a…

A: Standard deviation is the positive square root of the mean of the squared deviations of given…

Q: The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13,…

A:

Q: The deviation of the largest observation in the sample from the sample mean is,

A: Here given  A random sample of patients visiting a hospital emergency room was obtained and the…

Q: The mean IQ of 200,000 current and past University of Manitoba students has been found to be 81.9.…

A: Given: Population mean μ=81.9 Population standard deviation σ=13.1 Number of people in 2016 = 29987…

Q: (d) What height is at the 20th percentile? (e) What height is at the 80th percentile? (f) What…

A: mean = 70 s = 4

Q: Use the range rule of thumb to approximate the standard deviation. 22, 29, 21, 24, 27, 28, 25, 36 O…

A: The given data is listed below. 22, 29, 21, 24, 27, 28, 25, 36. The objective is to find the…

Q: A survey collected the data below. x 26 4 16 12 20 The mean is 15.6. Calculate the deviation of…

A: Given data,  X : 26, 4, 16, 12, 20 Given mean is 15.6 To find the deviation of x = 16

Q: Given this data determine a) the mean customer rating and b) the standard deviation for the customer…

A: We have to calculate the mean and SD for the given frequency distribution of customer ratings.

Q: A real estate agency says that the mean home sales price in City A is the same as in City B. The…

A: Solution-: We identify the claim and state the H0 and Ha

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: GivenMean(μ)=50standard deviation(σ)=8z=2.50

Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size…

A: The standard error of mean is, SE = σ/√n, where σ is the standard deviation and n is the sample…

Q: The three data sets have the same mean and range, but is the variation the same? Prove your answer…

A: For all the parts, it is given that, x=5+7+9+11+13+15+177=777=11

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.