The graph illustrates the distribution of test scores taken by College Aigebra students. The maximum possible score on the test was 140, while the mean score was 76 and the standard deviation was 14. 34 48 62 76 90 104 Distribution of Test Scores What is the approximate percentage of students who scored between 76 and 90 on the test? What is the approximate percentage of students who scored higher than 104 on the test? What is the appraximate percentage of students who scored higher than 118 on the test? What is the approximate percentage of students who scored between 48 and 104 on the test?

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: From the given information, Mean =74 and standard deviation = 15.

Q: n​ 2007, the mean rate of violent crime​ (per 100,000​ people) for 10 regions in the northeast of a…

A: According to the empirical rule, for normal/ symmetric distribution, approximately 95% of the…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A:

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: Given Data: Let X represent the point distribution Mean=530 Standard deviation=80   X~ Normal(530,…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: Given:     Maximum score = 130, mean score = µ = 78,   standard deviation =σ = 12,  Part a:…

Q: An environmental biologist recorded the 20 24 22 20 numbers of snail eggs in the first clutch…

A: If we look at both the graphs provided (at 220 C and 250 C ) , the curves are skewed but the data is…

Q: What is the approximate percentage students who scored between 61 and 91 on the test?

A: Let , X→N(μ=76 , σ=15) Our aim is to find the approximate percentage students who scored between 61…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days…

A: Solution: Let X be the length of pregnancies in a small rural village From the given information, X…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: In​ 2007, the mean rate of violent crime​ (per 100,000​ people) for 10 regions in the northeast of a…

A: According to Empirical rule 68% of Observations fall within the given Inteval, (mu-sigma to…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A:

Q: In a certain distribution of​ numbers, the mean is 80 with a standard deviation of 3. At least what…

A:

Q: Given that a set of scores have a normal distribution, a mean of 74, and a standard deviation of 5:…

A:

Q: In​ 2007, the mean rate of violent crime​ (per 100,000​ people) for 10 regions in the northeast of a…

A: Solution: Let X be the violent crime rate. From the given information, X follows normal distribution…

Q: Suppose that the distribution of scores on an exam is closely described by a normal curve with a…

A: we have a formula for calculating the percentile in case of normal curve  which is Mean+Z*standard…

Q: 21. In 1965, the mean price of a new car was $2,650 and the standard deviation was $1000, In 2011,…

A: The mean and standard deviation of price of new car in 1965 are 2,650 and 1000. The mean and…

Q: Suppose that a researcher is interested in the possible relationship between the amount of screen…

A: List of formulae : Test statistic : t =rn-21-r2 Where , r is correlation coefficient. r =…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A:

Q: Suppose the people living in a city have a mean score of 40 and a standard deviation of 7 n a…

A: We have given that  Mean=mu=40  Standard deviation=sigma=7

Q: What proportion of individuals score less than 51   points on this test?

A: given: mean score = 65 standard deviation of the score = 8 we need to find proportion of individuals…

Q: The following graph portrays the distribution of the number of spicy chicken sand- wiches sold at a…

A: Empirical Rule: The percentage of values lies between one standard deviation from the mean is 68%.…

Q: In a Science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are…

A: The mean is μ=42 and the standard deviation is σ=5 so it follows:…

Q: he scores on a psychology exam were normally distributed with a mean of 65 and a standard deviation…

A: Given,μ=65σ=6

Q: A teacher finds that the test scores of a group of 40 students have a mean of 72 and standard…

A: (a) A teacher finds that the test scores of a group of 40 students have a mean of 72 and standard…

Q: Assume the grades on a test in a very large class are normally distributed with a mean of 72 and a…

A: From the given information using Empirical rule we find the probability.

Q: Assume the test scores in your class are normally distributed with a mean of 84. You scored a 96,…

A: Given: mean = 84.

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A:

Q: A score that is 20 points above the mean corresponds to a z-score of z – 1.25. What is the standard…

A: Given: z= 1.20 20 points above the mean. that is

Q: Suppose the test scores in a class are normally distributed with a mean of 70 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: 2. In a particular normally distributed set of scores, the mean is 65.75 and thestandard deviation…

A: As per the honor code, We’ll answer the first question since the exact one wasn’t specified. Please…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A:

Q: What is the approximate percentage of students who scored lower than 50 on the test? % What is the…

A: Let , X→N(μ=80 , σ=10) Our aim is to find the following :  a) What is the approximate percentage of…

Q: The distribution of the number of hours people spend at work per day is unimodal and symmetric with…

A: Solution-: Given: μ=8hours,σ=0.7hours We find, (a) If Saba’s z-score for his work hours was −1.3 ,…

Q: Assume that the SAT test scores are normally distributed with a mean score of 1200 and a…

A:

Q: The distribution of the annual incomes of a group of middle management employees approximated a…

A: In question, The distribution of annual income of middle management employees approximated normal…

Q: he scores on a standardized mathematics test for 8th grade children in New York State for a normal…

A: mean = 70 standard deviation = 10 a. What proportion of the students in the state have scores less…

Q: Suppose you are working with a data set that is normally distributed with a mean of 400 and a…

A: The normal distribution: A continuous random variable X is said to follow normal distribution with…

Q: In certain distribution of numbers,the mean is 70 with a standard deviation of 3. At least what…

A: Given, Mean μ = 70 Standard deviation σ = 3

Q: In​ 2007, the mean rate of violent crime​ (per 100,000​ people) for 10 regions in the northeast of a…

A: Given, μ=334σ=126 Let X be the violent crime rate X follows normal distribution with mean µ=334 and…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: We know by empirical rule that;…

Q: 1. For each day of last year, the number of vehicles passing through a certain intersection was…

A:

Q: suppose the average time to fill a routine prescription at a local pharmacy is 35 minutes based on…

A: Given data,Mean μ=35sd    σ=11x=48z=?

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: In a sample distribution, a score of x = 21 corresponds to z = -1.00 and a score of x = 12…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ  are the mean…

Q: In a recent​ year, the mean test score was 1539 1539 and the standard deviation was 310 310. The…

A: Given:

Q: Please help

A: This is how a normal distribution graph looks. Here given that mean=100 and standard deviation=14

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 69…

A: Let X denote the scores on a statewide standardized test and it follows normal distribution with…

Q: What is the approximate percentage of students who scored lower than 31 on the test? What is the…

A:

Q: The quality-grade point averages of 300 college freshmen follow approximately a normal distribution…

A: Given : Population Size (N) =300 The quality-grade point averages of 300 college freshmen follow…