A professor has recorded exam grades for 10 students in his class, but one of the grades is no longer readable. If the mean score on the exam was 80 and the mean of the 9 readable scores is 85, what is the value of the unreadable score? ..... The value of the unreadable score is

Q: After entering the test scores from her Statistics class of 25 students, the instructor calculated…

A: IQR is obtained as the difference between the third and first quartiles.

Q: The mean monthly salary of 32 men is P28,500 while that of 38 women is P24,400. Find the mean salary…

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Q: A professor has recorded exam grades for 10 students in his class, but one of the grades is no…

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Q: Alice was told that her reading test score was 3 standard deviations below the mean. If test scores…

A: Z-score is the measure of how far the standard deviation is away from the mean (above/below). Above…

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Introduction: Suppose there are k groups, such that the jth group [j = 1, 2, …, k] has nj…

Q: The manager of Carrefour selected samples of 64 customers and computed the sample average amounts…

A: Given: Sample size, n = 64          If the average amount spent is normally distributed then we are…

Q: he sample mean for a recent introductory psychology test was 78, and the standard deviation was 3.…

A: Given Information: Mean = 78 Standard deviation = 3 Student received a score of 82 i.e., X = 82…

Q: A stats instructor was horrified to see that the distribution of N = 53 homework scores had a mean…

A: Solution: From the given information, N=53 home work scores and µ=73.

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

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Q: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ)= 79,…

Q: If a z-score is 0, it is on the mean. True or False

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Q: imagine you’re hired by a beef company called “American Beef Makers” as a Data Analyst and you’re…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: Suppose that in a large class, the instructor announces that the average grade on an exam is 75.…

A: According to the definition of estimation, a sample mean is equal to the population mean.

Q: The mean age of a group of teachers representing a school at a conference is 40 years old. If the…

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Q: A professor has recorded exam grades for 40 students in his​ class, but one of the grades is no…

A: From the provided information, Number of students = 40 The score on the exam was 82. The mean of the…

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: We want to find mean score for all ninth graders in the city

Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

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Q: The National Center for Health Statistics reports that the average systolic blood pressure for males…

A: Note:- As per our policy, we can answer only three subparts of a question. Please make a new request…

Q: Out of a class of 25 students, 24 took an exam in class and got a mean of 74 points and a standard…

A: Given: Total number of students, n = 25            Number of students who gave the test, n' = 24…

Q: A distribution of scores has a mean of 51.5, a median of 51.2, and a mode of 51. Based on this…

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Q: Bill scored 35 on a college algebra exam, where the mean was 25 and the Standard Deviation was 5.…

A: Given that the score for algebra exam is 35, mean is 25 and standard deviation is 5. z score for…

Q: 1 point to a​ D, and 0 points to an F. What is the GPA of a student who gets an A in a 3​-credit…

A: The data of the score of the student will be: credit score   grade(point)   number of course 3…

Q: One sample of n = 4 scores has a mean of M = 12, and a second smaple with n = 6 scores has a mean of…

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Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: We have given that the mean score of test of all the ninth graders from the three school's of the…

Q: in a gallup poll of randomly selected adults, 66% said that they worry about identity theft.  For a…

A: Given,         sample size(n) =1013    The probability of an adults said that     They worry about…

Q: After the analyses, Rosalind found a significant difference in test scores between taking the test…

A: The results are different because it is likely that the test statistic value obtained by Rosalind is…

Q: A distribution has a mean of 75 and a median of 70. This distribution is probably positively skewed

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Q: a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 85, what…

A: Given data,Mean μ=60sd    σ=7 If Roberto scored 85z-score=?

Q: Under what circumstances is a score that is 15 points above the mean an extreme score relatively far…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: The state Government gives grants to low-income undergraduate students. According to the National…

A: The given hypotheses are as follows: H0: µ = 2,600. Ha: µ ≠ 2,600. The sample size is 50 students,…

Q: A professor has recorded exam grades for10 students in his​ class, but one of the grades is no…

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Q: A professor has recorded exam grades for 20 students in his class, but one of the grades is no…

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Q: A population of N=5 scores has a mean of μ=8. After one score is removed, the mean is found to be…

A: We have to find given missing score.

Q: The mean of 15 items was found to be 45. On rechecking, it was found that two items were wrongly…

A: Given: Wrong mean = 45 Number of observations = 15 Incorrect values = 12, 18 Correct values = 32, 28

Q: Suppose that an anxiety measure has a mean of 106 and SD of 20. The researcher only wants to work…

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Q: A consumer agency wants to determine which of two laundry detergents, A or B, cleans clothes better.…

A: Given information: The given randomization dot-plot is based on 200 simulated samples.

Q: Dr. Xyz claims that the average salary of workers in Jones is P35,000. A random sample of 100…

A: Given: Mean to be tested, μ=35000Sample size, n=100Sample mean, x¯=40000

Q: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

A: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

Q: Florida State University, the mean IQ is 116 with a standard deviation of 14. Given this…

A: In the School of Medicine at Florida State University, the mean IQ is 116 with a standard deviation…

Q: If 10 men in a company have an average annual salary of GH¢360,000 and 23 women have an average…

A: The mean is the sum of a collection of numbers divided by the count of numbers in the collection. 10…

Q: n which test did she perform better?

A: Here use standard normal variable Z for comparison  Here mean and standard deviation is from 200…

Q: on a nationwide math test,the mean was 63 and the standard deviation was 7. if roberto scored…

A: According to the given information, we have Mean = 63 Standard deviation = 7

Q: 2. On a standardized test, Sara had a score of 81, which was exactly 2 standard deviations below the…

A: Given : Test score = X = 81 Standard deviation = σ = 3

Q: two fifth grade classes have nearly identical mean scores on an aptitude test, but one class has a…

A: It is given that two fifth grade classes have nearly identical mean scores on an aptitude test, and…

Q: For fast-food restaurants, the drive-through window is an important revenue source. The fast-food…

A: Given that For fast-food restaurants, the drive-through window is an important revenue source. The…

Q: A sample of n = 5 scores has a mean of M = 8. if one new score with a value of X = 2 is added to the…

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Q: The mean grade of  Adrian in the final examination in mathematics was 85 and the standard deviation…

A: Mean for mathematics = 85 Standard Deviation for mathematics = 7 Mean for science = 89 Standard…

Q: For a frequency distribution of marks in Statistics for 100 students, the arithmetic average was…

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