The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 140, while the mean score was 74 and the standard deviation was 15.   " The bell chart goes from 29,44,59, 74, 89,104,119 (end)    Use the "Empirical Rule", not a calculator or other technology. Do not round your answers. What is the approximate percentage students who scored between 59 and 89 on the test? __?__% What is the approximate percentage of students who scored higher than 104 on the test? __?__% What is the approximate percentage of students who scored between 74 and 89 on the test? __?__% What is the approximate percentage of students who scored between 44 and 104 on the test? __?__%

Q: What is the probability that a first grade classroom of 20 students who are chosen randomly from the…

A: Given Information: Mean μ=100 Standard deviation σ=15 Sample size n=20

Q: The mean score on a set of 25 tests is 76. What is the sum of all the test​ scores?

A: The mean (aka the arithmetic mean, different from the geometric mean) of a dataset is the sum of all…

Q: Women's heights are normally distributed with mean 63.8in and standard deviation 2.6in. The U.S.…

A: Given that the men heights are normally distributed with mean 69.5 in and standard deviation 2.4…

Q: A teacher wanted to know how well the gifted studentsin here class perform relative to her other…

A: Given  Hypothesis  Ho: mu=50 vs H1: mu> 50 n=31, Xbar=55, sigma= 10

Q: Suppose that the mean score of a class of 29 students was 78. The 16 male students in the class had…

A: From the provided information, The mean score of 29 students was 78. The 16 male students has mean…

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A:

Q: he effects of mentoring on intelligence scores. He wanted to know as a baseline what the averag

A: mean(μ)=100standard deviation(σ)=16  n=50    let X~N(100,16)

Q: there are 300,000 people review  for the movie  pupulation mean is 7.2 stars and standard deviation…

A:

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A: It is given that the mean and standard deviation are 145 and 30.

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A: Given data is19,22,26,28,29,31,34,34sample size(n)=8

Q: According to a medical journal, the distribution of weights of newborn babies is approximately…

A: The objective of this question is to find the percentage of newborn babies that weigh between 3100…

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A: Given,mean(μ)=95standard deviation(σ)=10

Q: The mean weight of newborn Golden Retriever Puppies is 15.2 ounces, with a standard deviation of 1.3…

A: Mean = 15.2 standarsd derivation = 1.3 x=14.4 p(x)=(x-mean)/s.d =(14.4-15.2)/1.3 = -0.8/1.3

Q: is 80 a suspect outlier

A: Here given,  One indicator of an outlier is that an observation is more than 2.5 standard deviations…

Q: Find the proportion of scores greater than 70 mean is 90 standard deviation is 10

A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…

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A: Consider X be a random variable which follows normal distribution indicating the score earned on a…

Q: A paper reported that for a group of 76 college students, the average number of responses changed…

A: The mean number of responses changed from correct answer to incorrect answer on a test The standard…

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A: The standard normal value helps to understand the number of deviation of observations from the mean.…

Q: If the main effect of age is significant, describe the main effect of age. Include the overall means…

A: Main effect in the Analysis of Variance test is the effect of one the independent variable on…

Q: Robert finished a triathlon in 64.5 minutes. Among all men in the race, the mean finish time was…

A: formula for z-score is

Q: The cholesterol levels of a group of young women at a university are normally distributed, with a…

A: Given μ=190σ=37 Let X: Random variable for the cholesterol level of young women Then X~N(190,372)

Q: Last year, the revenue for medical equipment companies had a mean of 7070 million dollars with a…

A: The objective of this question is to find the percentage of medical equipment companies with revenue…

Q: Explain an important difference between the standard deviation and the mean.

A:

Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: From the given information, Mean height (µ) = 62 inches Standard deviation (σ)= 4 inches Thus, the…

Q: According to the Los Angeles Times, speed limits on California highways are set at the 85th…

A: According to the Los Angeles Times, speed limits on California highways are set at the 85th…

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: What is difference between the Differences between Mean and Median?

A: The measures of centre or measures of central tendency are those descriptive measures that give the…

Q: A researcher believes the mean weight of male turtles is more than 205 pounds, she samples 18 male…

A: Denote μ as the population mean weight of male turtles.   The claim is that the mean weight of male…

Q: You have a data set with mean = 40 and standard deviation = 3. What can you say about the percentage…

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Q: Which statistic would you use if you are interested in comparing the mean number of hours worked by…

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Q: What is the 75th Percentile of a data set when the Inter Quartile Range (IQR) is 12.5 and the first…

A:

Q: What percent of the students received a score below 64, if the mean grade on a test was 70 and the…

A:

Q: The mean score on a set of 28 tests is 75. What is the sum of all the test​ scores?

A: The objective of this question is to find the sum of all the test scores given the mean score and…

Q: Two thousand students took an exam. The scores on this exam are Normally distributed with mean =81…

A: Given data, mean =81 points  standard deviation =15 points. Find  the middle 50% of the exam scores…

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.