The scores on a psychology exam were normally distributed with a mean of 64 and a standard deviation of 8. What is the standard score for an exam score of 64? The standard score is (Round to the nearest hundredth as needed.)

Q: A college professor noted that the grades of his students in an introductory statistics class were…

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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: The scores on a psychology exam were normally distributed with a mean of 50 and a standard deviation…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.8 inches and a…

A: Provided information:Mean (men)=69.8Standard deviation (men)=2.69and,Mean (women)=64.7Standard…

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Q: Scores on a recent national statistics exam were normally distributed with a mean of 80 and standard…

A: Obtain the standard z-score for X equals 89 The standard z-score for X equals 89 is obtained below:…

Q: e heights of adult men in America are normally distributed, with a mean of 69.3 inches and a…

A: The z-score is also called standard score. It gives an idea of how far from the mean a data point…

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

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

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…

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Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: If the mean exam score of a class was 75%, with a standard deviation of 15%,what percent of students…

A: Given,mean(μ)=0.75standard deviation(σ)=0.15

Q: The grades on a test follow a normal distribution with a mean mark of 70 and a standard deviation of…

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Q: The salaries of 300 employees of a certain factory in Baguio City have a mean of P6,500 and a…

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Q: The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a…

A: Given data: Mean of men (μ)=69.7 Standard deviation of men (σ)=2.63 To find: z-score=? Formula used:…

Q: If the average score on a statistics exam was 76, and the standard deviation was 7, what can you…

A: Given : The average score on a statistics exam was 76, and the standard deviation was 7

Q: For a sample of raw scores, you calculate a mean of 15.25 and a standard deviation of 3.19. What is…

A: Introduction:Suppose a random variable, X has sample mean, x̅ and sample standard deviation, s.For a…

Q: A class midterm had an average score of 75% with a standard deviation of 4%. Based on your answer…

A: Unusual: When z-score is less than -1.5 and greater than 1.5 then the event is said to unusual. The…

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.

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A: Given: Sample size=n=18,Standard deviation=σ=6150.

Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 62…

A: Given: μ=62 minutesσ=18 minutes

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A: We have given that  X~N(mu, sigma^2) mu = 72  Z-score =(x-mu )/sigma

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: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given information- Population mean, µ = 67 inches Population standard deviation, σ = 3 inches We…

Q: The heights of adult men in America are normally distributed, with a mean of 69.8 inches and a…

A: Givendata for adult men Mean(μ)=69.8standard devaition(σ)=2.62data for adult…

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

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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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A: X follows a Normal distribution with mean = 50000 and S.D = 2500 Then z=(x-mean)/SD =…

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Q: A z-score of +1.6 represents a value which is how many standard deviations above the mean?

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.2 inches and a…

A: The z score indicates how many standard deviations that a data points away from the mean. It can be…

Q: A standardized test has a mean of 50 and a standard deviation of 4. Which of the following is the…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: the mean weight of a group of boys is 145 lb, with a standard deviation of 5lb. if the weights are…

A: We have to find correct answer..

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A: Given,mean(μ)=25standard deviation(σ)=4grade score(X)=32

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Q: What is the z-score if our standard deviation was 2, mean of 49 and our specific observation is 47?

A: Given: Standard deviation = 2 Mean= 49 Specific observation =47 Determine the Z- score using the…

Q: The scores on a psychology exam were normally distributed with a mean of 59 and a standard…

A: Mean = 59 Standard deviation = 10 The formula for z is: z=x-μσ

Q: The heights of adult men in America are normally distributed, with a mean of 69.4 inches and a…

A: Solution: Let X be the height of adult mean is America and Y be the height of adult women in…

Q: In an all boys school, the heights of the student body are normally distributed with a mean of 71…

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Q: The College Board National Office recently reported that in 2011-2012, the547,038 high school…

A: The given information is:

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Q: The average score on the Stats midterm was 79 points with a standard deviation of 4 points, and…

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Q: The combined math and verbal scores for students taking a national standardized examination for…

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Q: The scores for all high school seniors taking the verbal section of the Scholastic Aptitude Test…

A: Given distribution is bell shaped. In bell shaped distribution mean, median and mode are equal.…

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Q: If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what is…

A: The mean is 100 and the standard deviation is 15.

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.