Az-score of z = +1.00 indicates a position in a distribution Above the mean by 1 point. Above the mean by a distance equal to 1 standard deviation. Below the mean by 1 point. Below the mean by a distance equal to 1 standard deviation.

Q: sume that a normal distribution of data has a mean of 24and a standard deviation of 6. Use the…

A: Given that  The data is normally distributed with Mean (μ) = 24 Standard deviation (σ) = 6  We know…

Q: A score of is 3 standard deviations above the mean.

A: Let , X→N(μ=140 , σ=28) Our aim is to find the score 3 standard deviation above mean

Q: Scores on the SAT are normally distributed with a mean of 500 and a standard deviation of 100. What…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given that, Mean = 69.0 Standard deviation = 2.8 Z score = -1.9

Q: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random sample…

A:

Q: On a recent quiz, the class mean was 78 with a standard deviation of 4.2. Calculate the Z-score (to…

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

Q: The mean value of the scores in a Statistics exam was 85 with a standard deviation of 4. Find an…

A:

Q: On a standardized exam, the scores are normally distributed with a mean of 300 and a standard…

A: To find the z-score of a person who scored 280 on the exam, where the scores are normally…

Q: 4. Roland received a score of 70 on a test for which the mean score was 65.5. Roland has learned…

A: Given ,mean(μ)=65.5Z - score =0.6Roland received a score(X)=70

Q: difficult exam has a normal distribution with a mean of 50 and a standard deviation of 10. Find the…

A: #  Here given that        X~Nμ,σ  and        z=x-μσ→                    1 So according to equation…

Q: On a recent quiz, the class mean was 75 with a standard deviation of 4.6. Calculate the z-score (to…

A: Plug in all the values in the above formula

Q: On a recent quiz, the class mean was 72 with a standard deviation of 5. Calculate the z-score (to 4…

A:

Q: A normal distribution has a mean of 15 and a standard deviation of 2. Find the value that…

A: From the provided information, Mean (µ) = 15 Standard deviation (σ) = 2 X ~N (15, 2) The z value…

Q: Entrance examination scores are normally distributed with a mean of 75 and standard deviation of 10.…

A: We have, Population mean (μ)=75Population standard deviation (σ)=10

Q: Assume that math test scores are normally distributed with a mean of 500 and a standard deviation of…

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Q: Average temperatures in May in a certain city are normally distributed with a mean of 70 degrees and…

A:

Q: On a first exam a particular class produces a mean exam score of 79 with a standard deviation of 3.…

A: Given : Sample mean = 79 standard deviation = 3

Q: On a standardized exam, the scores are normally distributed with a mean of 550 and a standard…

A:

Q: 3. standard deviation of 190 and 88% of ... The SAT score distribution for 2020 is approximately…

A: Given: The SAT score distribution of 2020 is approximately normal. Let μ denote the mean of the…

Q: how do you find the standard deviation when the score is 9 points above tthe mean?

A: = population standard deviation = the size of the population = each value from the population =…

Q: In a standardized exam the mean score is 400 with a standard deviation of 50. Assume the scores…

A: Solution

Q: Scores on a history test have average of 80 with standard deviation of 5. What is the z-score for a…

A:

Q: The intelligence quotient (IQ) score is normally distributed in a certain population of children.…

A:

Q: A normal distribution has a mean of 76 and a standard deviation of 4. Determine the z-score for the…

A: To find z-score  for the data value of 88.

Q: chievement exam of all grade 12 students in Mathematics is 82. Fifteen students were subjected to a…

A: The t-statistic is computed as follows: Hence, the t value is 7.193.

Q: The mean IQ of 320 college students of a certain university is 100 with a standard deviation of 15.…

A:

Q: a normal distribution has a mean 20 and standard deviation 5. what is the z score that corresponds…

A: A normal distribution has a mean=20, standard deviation =5.

Q: A  distribution has s standard deviation of σ=8. A score  below the mean by 16 points would have a…

A: Solution: From the given information, σ=8. Suppose the mean is “µ” and the below the mean by 16…

Q: normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which…

A: Given that  X~N(μ= 80 , σ= 14 ) μ= 80 , σ= 14 Formula for Z-score Z=(X-μ)/σ

Q: 2. A normal distribution of scores has a mean of 120 and a standard deviation of 20.What score…

A:

Q: Scores on a test are normally distributed with a mean of 102 and a standard deviation of 16. What…

A: Given information- Population mean, µ = 102 Population standard deviation, σ = 16 Let, X be the…

Q: Blood pressure According to a health informa- tion website, the distribution of adults' diastolic…

A: Obtain the Z-score for the random variable X equals 80 The Z-score for the random variable X…

Q: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…

A: The scores on a test in a particular class follow a Normal distribution with mean μ=140 and standard…

Q: The distribution of SAT scores is normal with a mean of µ = 500 and a standard deviation of σ = 100.…

A: Obtain the SAT score separates the top 25% of the distribution from the rest. The SAT score…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A:

Q: On a standardized exam, the scores are normally distributed with a mean of 350 and a standard…

A:

Q: mean = 600 standard deviation: 10   If the sample size is n=9​, what is the standard deviation of…

A: Given mean°600, standard deviations=10, n=9

Q: A distribution of values is normal with a mean of 202 and a standard deviation of 91.5. Find P75,…

A: Obtain the score separating the bottom 75% from the top 25%. The score separating the bottom 75%…

Q: SAT math scores has an unknown distribution with a mean of 541 and a standard deviation of 103.…

A:

Q: Approximately what percentage of scores falls between -1 and +1 Standard deviation around the mean…

A: Let X be the random variable from Normal distribution with mean μ and standard deviation σ.

Q: Scores on the SAT form a normal distribution with a mean of 500 with a standard deviation of 100. If…

A: Let X be the sat score in the state college. X follows normal distribution that has mean µ = 500 and…

Q: 5. Blood pressure According to a health informa- tion website, the distribution of adults' diastolic…

A: Given Mean=70 Standard deviation=20 X=100

Q: Male elk living in the wild have a mean weight of 720 pounds with a standard deviation of 32 pounds.…

A: It is given that the mean and standard deviation of female elk weight are 515 and 20, respectively.

Q: What happens to the 'mean' of an x-distribution when you standardize the distribution? Z-scores are…

A: The mean and standard deviation of the standard normal distribution is 0 and 1.

Q: Average is 16.7, standard deviation is 3.6, what's x only 14% lower than?

A: Given Information: Mean μ=16.7 Standard deviation σ=3.6   To find x1 if PX<x1=0.14 Using a…

Q: A distribution of values is normal with a mean of 116.2 and a standard deviation of 60.1. Find P43,…

A:

Q: The population average of a college test score of students is 100 with a standard deviation of 25.…

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Q: The mean score on a standard exam is 320 with a standard deviation of 40. Suppose 100scores are…

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Q: The average number of dropouts for a school district has been 300 per year with a standard deviation…

A: Let X be the random variable denotes the number of dropouts for a school district which is normally…

Q: The distribution of scores for an exam follow the rule of thumb for standard deviation. If the…

A: Given information: Population meanμ=75. Population standard deviationσ=5. Let X be the scores for…