In a particular examination, the mean score is 82 and the standard deviation is 3.7. Wha is the Z- score of a particular student whos score is 91?

Q: People with z-scores above 2.5 on an IQ test are sometimes classified as geniuses. If IQ scores have…

A: Given,   People with z-scores above 2.5 on an IQ test are sometimes classified as geniuses. If IQ…

Q: On a standardized test, scores are normally distributed with a mean of 400 and a standard deviation…

A: Given data,μ=400σ=80P(X<x)=80%=0.80x=?

Q: On a statistics exam, the mean score was 80 and there was a standard deviation of 7. If a student's…

A: Given data, μ=80σ=7If x=92z=?

Q: College Professors have incomes with a standard deviation that is more than $21,000. A recent study…

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Q: In your school with 400 Grade 11 students, the final examination in General Mathematics has a mean…

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Q: if heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard…

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Q: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…

A: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…

Q: A set of test papers is normally distributed with a standard deviation of 5. If Riley scored an 83…

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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 the height of 1000 students in a University Campus closely follows a normal distribution with a…

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Q: Suppose the scores of students on an exam are normally distributed with a mean of 458 and a standard…

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: From the given Information, Let X represent the length of pregnancies in a small rural village and…

Q: Do men take less time than women to get out of bed in the morning? The 42 men observed averaged 7.6…

A: Given , n1=42 , n2 =52  x¯1=7.6 , x¯2 =9 s1=2.2 , s2 =2.1 The hypothesis will be stated as below  H0…

Q: Students at Arrowhead High School took a Math test with a mean of 120 and a standard deviation of…

A: Let X be the random variable of normal distribution with mean 120 and standard deviation 25 Let Z be…

Q: 2. The mean height for men is 70 inches with a standard deviation of 5 inches. Find the z- score of…

A: For the first question there is no data of 12 adult males in an office. So, iam answering for the…

Q: 1. On a final examination in Mathematics, the mean was 76 and the standard deviation was 5.…

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

Q: 1.A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard deviation…

A: Note: Please repost 2nd question as i can answer only 1 question as per my policy. 1) Given…

Q: What is the corresponding Z score ? Mean is 70, standard deviation is 10 and X= 89

A: We have to find z score.

Q: A standardized test of intelligence is scaled so that the mean IQ is 100, and the standard deviation…

A: Given that information  Mean = mu= 100  Standard deviation = s =15  Zscore = (x - mu)/s

Q: A college entrance exam scores are approximately normally distributed with a mean value of 145 and a…

A: Solution: Let X be the college entrance exam score. From the given information, X follows normal…

Q: A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from…

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Q: If a sample has a mean of 48 and a standard deviation of 3.2, what is the value in the set that…

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Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are thez-scores for the…

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

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A: Given information Mean (µ) = 24 Standard Deviation(σ) = 2 X = 27

Q: For a social club, the members had a mean age of 68 and a standard deviation of 10 years.  What is…

A: The mean is 68 and the standard deviation is 10.

Q: The scores of students on an exam are normally distributed with a mean of 241 and a standard…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 241 and…

Q: If you score 76 on a commercial pilot exam that has a mean score of 70 and a standard deviation of…

A: We have to find given percentile ....

Q: In 1970, adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148 mm Hg.,…

A: Given that in 1970 adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148…

Q: A department store has daily mean sales of $ 28,372.72. The standard deviation of sales is $2000. On…

A: Given information- Mean sales, μ = $ 28,372.72 Population standard deviation, σ = $2000 Tuesday’s…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

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Q: In an intelligence exam to determine the IQ of students, it is found out that the results are…

A: Let X be the IQ score of students which follows normal distribution with mean 100 and standard…

Q: Which is better a score of 95 on a test with a mean of 70 and a standard deviation of 15, or a score…

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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Let X be the lengths of pregnancies in a small rural village x¯=262sd=16 X~ Normal (262, 162)   For…

Q: THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of…

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Q: In a survey, 35 people were asked how much they spent on their child's last birthday gift. The…

A: Confidence interval is a concept closely related to interval estimation. Confidence interval is…

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

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Q: A popcorn company find that their 1kg bags have a mean of 985 grams with a standard deviation of 24…

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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A: Solution-: Given: μ=263 days, σ=13 days We want to find what range would you expect to find the…

Q: On an exam, Tom scored 8 points above the mean and had a z-score of +2.00. The standard deviation…

A: Given: z-score=2 Score above the mean=8

Q: Is is unusual for someone to run a 4 minute mile if the mean time is 10.2 minutes and the standard…

A: From the provided information, Mean (µ) = 10.2 Standard deviation (σ) = 2.9 X~N (10.2, 2.9)

Q: The exam scores of 200 students are distributed normally with a mean of 72 and a standard deviation…

A: Total students = 200 Standard deviation = 10 And distribute mean = 72 We have to find the number of…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A:

Q: A grade of 81 in a test in which the mean is 75 and the standard deviation is 12 corresponds to a…

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Q: The daily sales at a convenience store have a mean of $1280 and a standard deviation of

A: As given, the daily sales at a convenience store have a mean of $1280 and a standard deviation of…

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

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Q: Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 85?

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Q: Interpret the ­z-score of 1.45 in terms of its relationship to standard deviation as well as the…

A: Solution: From the given information, z=1.45.

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

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Q: The variance in a data set is 427. Find the standard deviation. Round to two decimals.

A: The random variable is X. It is given that the variance is 427. We have to find the standard…

Q: If the mean of a set score is 65 and the standard deviation is 15, what is the zscore of a person…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…