What percentage of scores are between scores 68 and 82?

Q: Find the percentage of data points that lie between -2.31 and 1.85.

A: Assuming the data follows standard normal distribution with mean 0 and standard Deviation 1Finding…

Q: Kevin scored at the 70th percentile on a test given to 9920 students. How many students scored lower…

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Q: The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the…

A: The cumulative frequencies are obtained in the below table:

Q: The mean of 11 numbers is 48. Removing one of the numbers causes the mean to decreaseto 43. . What…

A: Measures of Central Tendency: A measure of central tendency represents the central value or typical…

Q: The grades on a recent test were 89, 72, 100, 87, 65, 98, 77, and 92.  1. Calculate the median test…

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Q: After six biology test, Ruben has a mean score of 77. What score does Ruben need on the next test to…

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Q: The temperature for the last 5 days were: 75⁰F, 66⁰F, 80⁰F, 68⁰F and 73⁰F. What was the mean…

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Q: What’s the percentage for the frequencies?

A: We have convert data in proportikn and percentages

Q: What is the mean of 210, 160 and 200?

A: mean of n numbers  x1 , x2 , ... , xn is given as x1 + x2 + . . . + xnn

Q: What percent of scores are below a T score of 56?

A: Given, T score is 56. Now,

Q: On five exams, Rachel has a mean score of 80 points. Her lowest score was 50.  If this score is…

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Q: Carl earned grades of 62, 78, and 89 on four math tests. What is the mean of his grades?

A: The grades earned by Carl are : 62, 78 and 89 The number of grades, n=3 To evaluate : The mean of…

Q: What type of test would you use to determine if happiness and health are related?

A: Test is that whether happiness and health are related.

Q: The test scores for five students were 59, 60, 63, 76, and 87. How many points greater than the…

A: The mean is the average of all the values, or it is the sum of all the values divided by the number…

Q: How do you determine which exam score is higher relative to others

A: The normal distribution is a continuous distribution.

Q: Kevin scored at the 60th percentile on a test given to 9920 students. How many students scored lower…

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Q: a value represents the 95th percentile, this means that

A: Here Percentile means the value equal to or below which the data points lies.  option A says that…

Q: What are the percentages of scores that fall between -1 and 0/0 and 1

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Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…

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Q: What percentage of Births occurred among women between the ages of 40 and 42?

A: From the given table we have Total number of births = sum of all observation…

Q: What is the frequency of deaths measured from 2000 through 2004

A: We have to find the frequency of death measured from year 2000 to 2004

Q: What percentage of scores are between scores 75 and 89?

A: By emperical rule  P(-1<Z<1)= 0.68 P(-2<Z<2)=0.95 P(-3<Z<3)= 0.

Q: Why is the sum of the sum of six deviations -2, -1, -1, -1, 0, 5 when added =0?

A: Solution:It is one of the property of sample mean that the sum of deviations above average and the…

Q: Ten HR majors had an average grade of 94 on an exam. Fourteen business majors averaged 86, while six…

A: Given problem Given that   Ten HR majors had an average grade of 94 on an exam. Fourteen business…

Q: How do i calculate finding the percentage between two z scores?

A: To find the probability between two z-scores: z-score represents the number of standard deviations…

Q: You took the English achievement test to obtain college credit in freshman English by examination.…

A: General definition of pth percentile: For whole numbers p(where 1<p<99) , the pth percentile…

Q: The mean score on a set of 24 tests is 83. What is the sum of all the test scores?

A: Mean is the average value of the case. Mean score is the ratio of sum of all scores and number of…

Q: The average salary of male employees in a firm was $520 and that of females was $420. The mean…

A: We have given that  The average salary of male employees =$520 And the average salary of females…

Q: What number was removed?

A: This is a basic application of average . Average forms a firm backbone of high school mathematics .

Q: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

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Q: NCAE shows that the average score of the students is 80 and sd is 15. What is the percentile rank of…

A: Given :     Mean (μ)=80Standard deviation (σ) = 15x=84

Q: The results of a nationwide aptitude test in Mathematics are normally distributed with μ=80 and…

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Q: how to get percentage scores between the mean and the z score

A: I am taking an example to explain this Suppose mean weight of students is 100 kg and Standard…

Q: Explain about the Mean Difference Score.

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Q: The mean salary for 24 factory workers is ₱12 000. How much will one additional salary of ₱37 000…

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Q: How do the median number of video games owned compare for boys and girls?

A: We have to find median number of video games owned compare for boys and girls.

Q: The mean daily wage for 9 construction workers is ₱400. How much will one additional daily wage of…

A: Given that The mean daily wage for 9 construction workers is ₱400.  We have to find How much will…

Q: What score separates the top 1% of students from the bottom 99% ?

A: Given Information: Mean μ=80 Standard deviation σ=20

Q: What is the percentage of deaths that occurred in 2011?

A: We have given that the total number of fatal motor vehicle traffic crashes in the United States for…

Q: A parent comes to you and asks the difference between percent correct and the national percentile…

A: Concept: Percentage in simple terms can be difined as a number that is out of 100. Maximum marks are…

Q: The mean score on a test is 75, the median score is 80, and the mode score is 85.  Pat got an 82.…

A: Given: The mean score on a test is 75, the median score is 80, and the mode score is 85.

Q: 350 students took a standardized test, Sarah’s score was ranked at the 7th. What was the percentile…

A: that is (7×100)/350=700/350 =2

Q: Keith has scored 99, 69, 58, 93, and 75 on his previous five tests. What score does he need on his…

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Q: Which one measure of variation should you report for SOCIAL CLASS(1=lower, 2= working,…

A: The range is used as a measure of variation report for SOCIAL CLASS.

Q: What are the percentages of scores between -1 and -2/1 and 2?

A: Given problem Given that

Q: The median of the data 82, 140, 74, 144,110, 122, 113, 99 is

A: Given data, 82,140,74,144,110,122,113,99

Q: If the mean of 5 values equals 34, then ΣΧ-

A:

Q: What percentage of IQ's are: a Greater than 95? b. Less than 120? c. Between 90 and 110?

A: Let X be the random variable from Normal distribution with mean (μ) = 100 and standard deviation (σ)…

Q: What is the percentage of players whose age is less than 32?

A: here given  mean = 33 year  standard deviation  =  2 year x= retirement age