A class of  n = 18 students takes an exam, and the class average is M = 76.5.  The professor grants a re-take to one student in the class, and this student’s grade goes up from X = 52 to a new score of X = 67.  What is the new class mean? Group of answer choices 78.42 78.50 77.33

Q: Kevin scored at the 70th percentile on a test given to 9920 students. How many students scored lower…

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Q: A survey among CLSU students was conducted. It is about their starting position when they sleep…

A: As the data was collected among CLSU students. So the population is the CLSU students. And 500…

Q: According to College Board the scores on the AP History exam are normally distributed with N(72,…

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Q: A professor grades students on 5 tests, a project, and a final examination. Each test counts as 10%…

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Q: Match these values of r with the accompanying scatterplots: 0.738, 1, 1, 0.995, and -0.373. Click…

A: The given correlations are 0.738,1, -1, 0.995,  -0.373

Q: n=9, p=0.35,x=2

A: Let x be the random variable which follows binomial distribution with sample size 9, and probability…

Q: Carl earned grades of 62, 78, and 89 on four math tests. What is the mean of his grades?

A: The grades earned by Carl are : 62, 78 and 89 The number of grades, n=3 To evaluate : The mean of…

Q: Noah scored 25 points in a game. Mai's score was 35 points. The mean score for Noah, Mai, and Clare…

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Q: Find the mean and median of the class’s scores on this quiz. Round to two decimal places when needed

A: Given that  From histogram  X-axis takes X values and Y-axis takes Frequency  X Frequency = f 1…

Q: What is the p value if the mean is 98.6, n=7, t= -2.114?

A: The P-value is the probability that provides strong evidence in favor of the alternative hypothesis.…

Q: (d) What is the nonresponse rate? (e) Suggest some methods that could be used in a future survey to…

A: The purpose of a survey is to examine the opinions, behaviors, or experiences of individuals or…

Q: How does k=.067?

A: Since we want to find the z-score for the 75th percentile (top 25 percent), we need to find the…

Q: Allie has 5 exam scores 98, 94, 84, 95 and 95 in math class. What score does she need on the final…

A: According to questionAllie has 5 exam scores 98, 94,84,95 and 95 in math classWe have to calculate…

Q: Two groups of students are given a problem solving a test and the results are compared. Determine…

A: The hypotheses are given below:

Q: ored 80,91,79,86, and 84 on his previous five tests. What score does he need on his next test so…

A: Given: Ored 80,91,79,86, and 84 on his previous five tests. What score does he need on his next test…

Q: Lionel has just gone grocery shopping. The mean cost for each item in his bag was $3.19. He bought a…

A: Given info: The mean cost for each item in his bag was $3.19.

Q: Find mean when n is 20 and p is 0.78

A: Given: Number of trials (n) = 20 Probability of success (p)=0.78

Q: 7. Suppose you buy a new car for $22,000. You put down $1500 and take out a loan for the rest. You…

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Q: Name Lois Chris Meg Peter Brian Stewie Exam1 57 46 45 18 98 96 Exam2 70 42 58 99 90

A: Given that,the mean of exam 2 is  65.Exam 1 and Exam 2 scores are given:NameExam 1Exam…

Q: Pleas find the p-value: Answers like 0.0198, 0.0199, 0.0200 does not work.

A: Test statistic = 2.33 p-value = 2 x P(Z > 2.33) = 2 x ( 1 - P(Z < 2.33)) = 2 x ( 1 - 0.99097)…

Q: Calculate the test statistics for the following scenario: 中 A local pizza shop thinks 80% of their…

A: Given : Proportion of customers who prefer Pepperoni pizza (p) = 0.80 Sample size of customers (n) =…

Q: 5. IQ's are normally distributed with mean and standard deviation 15. Find the probability that a…

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Q: Mary is participating in a 6-day cress-country biking challenge. She biked for 60, 51, 62, 63, and…

A: According to the question, 60+51+62+63+54+x6=59                    x = 64

Q: Class interval 150, 55[ [55, 601 [60, 65[ [65, 701 170, 75| [75, 801 Frequency 16 3 12 4. 10

A: Solution: Given information Total N= 50 students Class Interval Frequency [ 50,55] 16 [55,…

Q: Each histogram shows a binomial distribution with n = 28. Select the appropriate value for p from…

A: Given that the number of trials n=28  p=probability= 0.7, 0.55, 0.85 We will make a histogram using…

Q: A student receives test scores of 62, 83, and 91. The student's final exam score is 88 and homework…

A: The student’s mean score will be obtained as given below: Here, the total score is 125%.

Q: During the scholarship examination of a certain scholarship grant taken by 10,000 applicants,…

A: Given : Annabelle score (x) =350total number of applicant =10000Number of rank below x =8995

Q: The low temperatures in the Town of Rigby for 5 conservative days were -12, -17,-11,-12,-18 what was…

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Q: Identify the population being studied and the sample chosen. The final exam scores of 44 out of the…

A: Solution: Sample is the subset of population. Population is the entire set of units under study.

Q: The mean score on a test is 75, the median score is 80, and the mode score is 85.  Pat got an 82.…

A: Given: The mean score on a test is 75, the median score is 80, and the mode score is 85.

Q: 40 students took an exam, the passing score is 70. The mean score of students who passed are 75, the…

A: The mean of a dataset is calculated by dividing the sum of observations by the number of…