The population average of a college test score of students is 50 with a standard deviation of 10. For 10 students what is the probability that the mean will be greater than 60?
Q: Scores on a history test have average of 55 with standard deviation of 10. What is the probability a…
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Q: The mean of a set of data is 108.06 and its standard deviation is 115.45 What is the z score for a…
A: Z-score = 3.3045 answer.
Q: Scores for a standardized test are normally distributed with a mean of 1200 and a standard…
A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?
Q: The test scores in a class are normally distributed with a mean score of 77. if the standard…
A: The distribution of test score are normally distributed with mean of 77. Now consider the standard…
Q: On a standardized examination, Laura received a score of 83, which was exactly 2 standard deviations…
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Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…
A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…
Q: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…
A: The z score explains the deviations of the observations from the mean. It is calculated using the…
Q: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…
A: Solution
Q: A test has a mean of 140 and a standard deviation of 27. What proportion of people have scores…
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Q: if a student scored 88 points on a test when the mean score was 80.2 and the standard deviation was…
A: From the provided information, Mean (µ) = 80.2 Standard deviation (σ) = 5.7
Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…
A: It is given that Mean, μ = 200 Standard deviation, σ = 9 Z-Score, Z = ( X - μ )/σ
Q: The test scores are normally distributed with a mean of 78 and a standard deviation of 9. If 39…
A: Obtain the probability that the average score is between 80 and 84. The probability that the average…
Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…
A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…
Q: The average score of all golfers for a particular course has a mean of 76 and a standard deviation…
A: We have given information with the usual notation, Let X denote the score of golfers for a…
Q: When Noah goes bowling, his scores are normally distributed with a mean of 135 and a standard…
A: Let X be the Noah goes bowling, his scores are normally distributed mean μ=135, standard deviations…
Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…
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Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…
A:
Q: A test score of 45 has an equivalent standard score (z-score) of 1.6. If the mean test score is 39,…
A: given dataraw score x = 45standard score z = 1.6mean μ = 39S.D. σ = ?
Q: Karen’s first psychology exam score is ‑1 (negative one) standard deviation from the mean in a…
A: It is given that, the z-score for Karen’s first psychology exam is -1.
Q: The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the…
A: Let us assume that X=score of a quizX follows a normal distribution with mean=24 and standard…
Q: The mean of a test is 400 and the standard deviation is 75. It is normally distributed. A sample of…
A: 1] Mean μ=400 2] standard deviation σ=75 3] n=25 4] μx¯=400σx¯=σn=7525=15
Q: Ngan scored 1 standard deviation below the class average on a statistics exam. The class average was…
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Q: On Bob's last history test, he had a score of 92. Bob's z-score was -0.5, and the test's standard…
A: Solution -Given that Score in History test be X=92 Z- Score=-0.50 Standard deviation= 6 Find mean…
Q: The average score of all golfers for a particular course has a mean of 75 and a standard deviation…
A: Let is denote X=the score of a golfern=sample size=81X has mean=75 and standard deviation=4.5So, X¯…
Q: The average score of all golfers for a particular course has a mean of 64 and a standard deviation…
A:
Q: art professor gives an A to any student in the top 9% of the distribution. The grades are normally…
A: Given X~N(mean μ=60, standard deviations σ=5) P(X>b)=9%
Q: Sally had a z score of +0.25 on a test with a mean of 62 and a standard deviation of 5. What was her…
A: From the provided information,Z score = +0.25
Q: A population has a mean of 75 and a standard deviation of 15 you randomly sample nine people from…
A: Given population have mean 75 and standard deviation 15. A sample of 9 people from the population is…
Q: Pattys final exams have an average of 78 and a standard deviation of 6. If she wants 4% of her…
A: X follows a Normal distribution with mean = 78 and S.D = 6 Then z=(x-mean)/SD = (x-78)/6 follows…
Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…
A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…
Q: The amount of money an American spends on Holiday presents is normally distributed with a mean of…
A: Given Mean=650 Standard deviations=80
Q: The standard deviation of the scores on a skill evaluation test is 290 points with a mean of 1286…
A: We have to find given Probability.
Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?
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Q: The IQ of highschool seniors is normally distributed with a mean of 100 and a standard deviation of…
A: The sample size is n=15. The population mean is μ=100. The population standard deviation is σ=15. We…
Q: Scores on the SAT test have a mean of 1518 and a standard deviation of 325. If 100 students are…
A: Scores on the SAT test have a mean of 1518 and a standard deviation of 325.
Q: The average score of all golfers for a particular course has a mean of 71 and a standard deviation…
A: Solution: Let X be the score of golfer for a particular course. From the given information, X has a…
Q: The scores on the exam public health professionals take to be certified follows a normal…
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Q: The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the…
A: Given data,μ=24σ=1.5P(X<21.9)=?
Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the…
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Q: A researcher measures the amount of sugar in several cans of the same soda. The mean is 39.01 with a…
A:
Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…
A: Normal distributionPopulation mean : Population standard deviation : The probability that a golfer…
Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
A:
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- IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability that an individual has an IQ higher than 94. Find the probability that an individual has an IQ between 85 and 112. Find the IQ score that separates the highest scoring 28.1% from the rest of the population.A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distributed with a mean of 460 and standard deviation of 80. What fraction of the applicants would you expect to have a score of 350 or above?The scores on a standardized test are normally distributed with a mean of 115 and standard deviation of 20. What test score is 2.2 standard deviations above the mean?
- The average score on the Stats midterm was 79 points with a standard deviation of 4 points, and Arthur's z-score was 1. How many points did he score? He scored points.The scores on a standardized test are normally distributed with a mean of 85 and standard deviation of 10. What test score is 1.7 standard deviations above the mean?11. In a certain test, 35 percent of the tested population scored higher than 6, 25 percent between 4 and 6, and 40 percent below 4. Assuming that the scores follow a normal distribution, calculate the average grade and the standard deviation. a) What percentage of the population has a grade that differs from the mean by less than 2 units
- The mean of the test is 89 with a standard deviation of only 4. How likely (what probability) is there that a student scored a perfect score of 100 or better?The average score on the Stats midterm was 71 points with a standard deviation of 5 points, and Jeremiah's z-score was 1. How many points did he score? He scored ? pointsThe distribution of scores for an exam follow the rule of thumb for standard deviation. If the average score on the exam is 75 and the standard deviation is 5, what percentage of students would you expect to score between 65 and 85 on the exam (to 2 significant digits)?
- IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a randomly chosen person's IQ score will be between 101 and 134, to the nearest thousandth?The scores on a standardized test normally distributed with a mean of 110 and standard deviation of 25. What score is 2.2 standard deviations above the mean?