Scores had a Mean of 83 and a Standard Deviation of 6 1. What percent of the scores fell between 71 and 95? 2. What percent of scores that were above 77? What percent of scores were below 71? 3. What percent of the scores fell between 65 and 77?

Q: 18. If the mean of a test score is 30 and the standard deviation is 3.7, which score could be…

A:

Q: Molly's score was 68 on a test with a mean of 80 and a standard deviation of 9.  What is her…

A:

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

A:

Q: A standardized memory test has a mean of µ = 100 and a standard deviation of σ = 10. Answer the…

A:

Q: The mean is 65 The Standard Deviation is 10 30 Students What score would be necessary to obtain…

A: From the given information, The Score of the student are normally distributed. Mean =μ=85 Standard…

Q: A set of data is normally distributed with a mean of 327327 and a standard deviation of 27.27. What…

A:

Q: 1. A psychology exam has 300 questions with each question worth 1 point. Assume that the…

A: Given information: Let X be the grades in a psychology exam. Then X is a random variable from Normal…

Q: What percent of the data is below 31?  What percent of the data is above 35?  What percent of the…

A: Let X be the random variable whose mean and standard deviation are given. According to the question-…

Q: What is the point estimate of the difference between the population mean expenditure for males and…

A: Provided data is, the average expenditure on Valentine's Day was expected to be $100.89. The average…

Q: Mrs. Sain

A: To find:  The raw score Given: μ=75 , σ=8 and Z=2.3 Let X be the raw score.

Q: The average salary at a certain company is $80,000 with a standard deviation of $12,000. Charles…

A: It is given that the mean and standard deviation are $80,000 and $12,000, respectively.

Q: Jim  figures that it takes an average of 17 minutes with a standard deviation of 3 minutes to drive…

A:

Q: If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value…

A: If a set of data has a mean of 50 and the standard deviation of 4.5. We have to find the z-score for…

Q: 6. Jared has a mean of 74 on his quizzes, with a standard deviation of 7. On his most recent quiz,…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 2. On a scale from 1 to 10, the mean approval of homosexual relations in the U.S. is 7.8. The mean…

A:

Q: Jesse scored a +12 while golfing and, 18 points while playing basketball. The statistics for his…

A: Here it is given that , Jesse scored a +12 while golfing and, 18 points while playing basketball.…

Q: Given that a data set has a mean of  40 and a standard deviation of 4, find the percent of data…

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted....…

Q: A Population has a Mean of 90 and a standard deviation of 25.  A sample of 20 college students is…

A:

Q: Given that a data set has a mean of  40 and a standard deviation of 4, find the percent of data…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: How many minutes did it take him to finish the face?

A: It is given that the distribution of finishing time for men was approximately normal with mean 242…

Q: A national achievement test is administered annually to 3rd graders. The test has a mean score of…

A: The formula of Z score is ,  z = x - μσ

Q: Renee scores an average of 153 points in a game of bowling, and her points in a game of bowling are…

A:

Q: Assume scores on an exam are normally distributed with a mean of 80 and a standard deviation of 5.…

A: It is given the mean and standard deviation are 80 and 5, respectively.

Q: The mean grade on a final examination was 72 and the standard deviation was 9. The top 10% of the…

A: Mean(µ) = 72Standard deviations (σ) = 9

Q: A successful basketball player has a height of 6 feet 5 inch . Based on statistics from a data​ set,…

A: Given: z score = 2.58 The height of players in cm is 195.58 ≈196cm The formula to compute the…

Q: A standardized measure of achievement motivation is normally distributed, with a mean of 35 and a…

A: Given data, μ=35σ=14P(X>x)=2.5%=0.025x=?

Q: Assume that Math test scores are normally distributed with a mean of 200 and a standard deviation of…

A: The provided information is  The mean and standard deviation is  µ=200 σ=40 P(X<120)=?…

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: The mean for the entire population of depressed people is 33.13 with a standard deviation of 5. If…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: 6. You got 91 in this statistics subject. How well did you do relative to all of the students who…

A: I solved exactly first question because of bartleby policy if you want more please upload…

Q: Please answer B and C:

A: Solution: b. Let X1 be the expenditure of the male customers and X2 be the expenditure of the female…

Q: 4. The mean for the entire population of depressed people is 33.13 with a standard deviation of 5.…

A: We have given that the distribution of all depressed people is normally distributed with mean 33.13…

Q: A person completes a timed task and is told that their z-score for the task is 1.36. The mean for…

A: Given: Population mean (µ) = 10.75 Population standard deviation (σ) = 2.40 z-score = 1.36

Q: The scores on an exam were normally distributed with a mean of 75 and a standard deviation of 8.…

A: Introduction :-  Let ,  X = Exam scores of students. Given that, X ~ N ( 75 , 64 )  Here we have to…

Q: The scores on a psychology exam were normally distributed with a mean of 71 and a standard deviation…

A: Given,μ=71σ=8

Q: The scores on a psychology exam were normally distributed with a mean of 56 and a standard deviation…

A:

Q: 18. If the mean of a test score is 30 and the standard deviation is 3.7, which score could be…

A: In this case, the question is incomplete for the first one. so we are answering the second question.…

Q: A professor told her class that the midterm scores were normally distributed. The average score in…

A:

Q: The weight of 100 female students aged from 15 to 20 years have a mean of 120 pounds and a standard…

A: Given information- Population mean, μ = 120 pounds Population standard deviation, σ = 6 pounds The…

Q: The scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation…

A: The scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation…

Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

Q: A professor told her class that the midterm scores were normally distributed. the average score in…

A: Solution: Let X be the midterm score. From the given information, X follows normal distribution with…

Q: The mean price of a certain brand of shoes is 100 NIS, with standard deviation of 15 NIS. The…

A: Given,mean(μ)=100standard deviation(σ)=15and the company had a promotion of a 20% discount on any…

Q: The mean SAT score for 13 male highschool students is 500 and the standard deviation is 100. the…

A: Let us denote the group of males as 1st sample and group of females as 2nd sample. Hypotheses for…

Q: The cerebral blood flow (CBF) in the brains of healthy people is normally distributed with mean of…

A:

Q: A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. c.…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 8 Let X be a random variable…

Q: 10. On a history exam, Roberto had a score of 72, which was exactly 3 standard deviations below the…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The weights for newborn babies is approx normally distributed with a mean of 6.1 pounds and a…

A: Given data, Mean=6.1 sd=1.8

Q: what is the z score for a person who received an SAT mathematics score of 685?

A: Here Given, The mean mathematics score for seniors who took the SAT in 2018 was 531. If the standard…

Q: The average score on a test of 40 students has a mean score of 53 and a standard deviation of 6. At…

A: Answer - The average score on a test of n = 40 Student has a mean score μ = 53  and σ = 6…