Peter analyzed a set of data with explanatory and response variables x and y . He concluded the mean and standard deviation for x as 7.8 and 3.70, respectively . He also concluded the mean and standard deviation for y as 12.2 and 4.15, respectively . The correlation was found to be 0.964

Q: A brother and sister took two different standardized tests.  He scored 114 on a test that had a mean…

A: Given that, A brother and sister took two different standardized tests.  He scored 114 on a test…

Q: Suppose a convenience store near a college campus sells two complementary products, energy drinks…

A: Let, X denotes the number of energy drinks and Y denotes the number of snacks sold per students.…

Q: Suppose that the weights of candy bars vary according to a normal distribution, with mean of 62…

A: The question is about normal dist. Given : The mean weights of candy bars ( μ ) = 62 g The std.…

Q: minimum shoulder girth is 87 cm and the maximum shoulder girth is 134 cm. The mean shoulder girth is…

A: Solution: Given information:  Let x = Shoulder girth and y= height  x = 108.87sx=10.12y= 173.86 sy=…

Q: 1. What’s the equation of the line you’d use to predict scores on the final based on scores on the…

A: 1. Let x denote the mid-term scores, and y denote the final scores. The slope for the equation is,…

Q: Private high schools often have entrance exams to assess the educational background of perspective…

A: Given Information: Brayden scored 174 on the Xavier high school admissions exam. Brayden scored 290…

Q: In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what…

A:

Q: McDonald’s advertises that its ice cream cones have a mean weight of 3.2 ounces.  A human server…

A:

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: if a student scored 88 points on a test when the mean score was 80.2 and the standard deviation was…

A: From the provided information, Mean (µ) = 80.2 Standard deviation (σ) = 5.7

Q: Doug has 1,000 bottle caps in his collection compared to Melissa's 2000 bottle caps. If the average…

A: Given,mean(μ)=1250standard deviation(σ)=500Doug bottle cap collection(X)=1000Melissa's bottle cap…

Q: he cost of laptops is normally distributed with a mean of $750 and a standard deviation of $60. What…

A: GivenMean(μ)=750standard deviation(σ)=60

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Q: The mean rate for cable t.v.from a sample of 80 households was $29 per month with a standard…

A:

Q: A statistics test has a mean of 60 and a standard deviation of 10 while an accounting test has a…

A: Given information Statistics test Mean µ = 60 Standard deviation σ = 10

Q: The average McDonald's restaurant generates $3.4 million in sales each year with a standard…

A:

Q: The average age of the marketing executives in an ad agency is 26, with a standard deviation of 6;…

A: Introduction :-  We have to compare the relative variability of age and income. We will compare the…

Q: A gym class is taking a fitness test. The gym teacher is recording how many sit-ups the participants…

A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Suppose that the random variable x defines the scores in psychology research.

Q: A set of scores has a mean of 5.8 and a standard deviation of 2.3. Calculate the z scores for the…

A: Given Data: Meanμ=5.8 Standard deviationσ=2.3   To Find: z-score for a) 2.1 b) 5.7 c) 7.3 d) 12.4

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: If the mean of the number of sales of houses is fifty-six, and the standard deviation is thirty-six,…

A: We have given, The mean number of sales of houses is x¯=56. And the standard deviation is σ=36.

Q: The SAT and ACT are standardized tests for college admission in the United States. Both tests…

A: Percentile of Sam's score is given by the cumulative probability of observing a score of at least…

Q: Suppose that the mean of a set of data is 50.2 and the standard deviation is 4.2.  Assume that the…

A: Given  μ=50.2, σ=4.2, h=5.1  We want to find the new mean and standard deviation.

Q: It has been reported that the standard deviation of the speeds of drivers on interstate -35 near…

A: It has been reported that the standard deviation of the speeds of drivers is 6.8 miles per hour for…

Q: Which of these statements is best?       The variable to be predicted is the independent variable.…

A: Which of these statements is best?       The variable to be predicted is the…

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: Suppose that grades on a midterm and a final exam have a correlation coefficient of 0.5, and both…

A: The least square equation for the predicting grades of final exam on the basis of the grades of the…

Q: The monthly income of trainees at a local mill is normaly distributed with a mean of $3300 and…

A:

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: GivenHighest speed measured (x)=78.4Mean(x)=18.37standard deviation(s)36.54

Q: ... Since the z score for the tallest man is z = and the z score for the shortest man is z = | , the…

A: The tallest living man at one time had a height of 238 cm. The shortest living man at that time had…

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: The provided information is:

Q: A statistics instructor gives two different tests to measure students' aptitude for statistics.…

A: We have given that, Mean1 = 22 and standard deviation1 = 5. Mean2 = 71 and standard deviation2 =…

Q: Sally had a z score of +0.25 on a test with a mean of 62 and a standard deviation of 5. What was her…

A: From the provided information,Z score = +0.25

Q: what is the value of the standard deviation of the weekly earnings of the bus drivers?

A: Let X be the random variable for the weekly earnings of bus drivers.Given that,Population mean

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

Q: Solar earned a score of 940 on a national achievement test. The mean test score was 850 wth a…

A: Given that  Solar earned a score of 940. The test scores are normally distributed. Mean test score…

Q: Suppose that the amount of caffeine (in milligrams) in an 16 fluid ounce energy drink can be modeled…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: What is the z-score for this raw score?

A:

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.