When Rajani goes bowling, her scores are normally distributed with a mean of 125 and a standard deviation of 11. Using the empirical rule, determine the interval that would represent the middle 99.7% of the scores of all the games that Rajani bowls

Q: The average exam score of a physics class is 75 points with a standard deviation of 3 points. Peter…

A: Given information Mean µ= 75 Standard deviation σ = 3 Peter’s score x = 72

Q: When Morgan runs the 400 meter dash, her finishing times are normally distributed with a mean of 81…

A: From the information, given thatLet X denotes the finishing times which follows normal distribution…

Q: On a final  examination in mathematics , the mean was 72  and standard deviation was 15 . Determine…

A: given information: μ=72σ=15x=65 we want to determine the z score . z=x-μσ  =65-7215  =-0.4667

Q: A student has taken a 50-point exam and wants to know how his score of 38 compares to the scores of…

A: It is given that Mean = 40 Standard deviation SD = 4 Score X = 38

Q: A group of students wrote an entrance Math exam and the scores were normally distributed. The mean…

A: The scores were normally distributed with mean 750 and standard deviation 95 μ=750σ=95 Z-score is…

Q: An educational study to be conducted requires a test score in the middle 40% range. If the mean is…

A: Let us assume X=score Given that X follows a normal distribution with mean= 100 and standard…

Q: Justin got a score of 85 on an GE MMW examination for which the mean is 75. Justin realized that the…

A: Considering the mean score in the specified examination as μ and variance of scores in the…

Q: Students receive an A+ on a 60 point test if they score 55 points or more.  The marks of a large…

A: Given: X~N(μ,σ)μ=50σ=5

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: Sarah's score on the second exam was 34 for which the mean of all scores was 28 and the standard…

A:

Q: The runs scored by a batsman in 5 ODIs are 31, 97, 112, 63, and 12. Find the standard deviatio

A: Given data, 31, 97, 112, 63,12 Find the standard deviation   To find the standard deviation first…

Q: When Lauren runs the 400 meter dash, her finishing times are normally distributed with a mean of 88…

A:

Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A:

Q: The temperature recorded at 60 airports in a region had a mean of 67 degrees Fahrenheit and a…

A:

Q: When Christian runs the 400 meter dash, his finishing times are normally distributed with a mean of…

A:

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: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A: GivenMean(μ)=1457standard deviation(σ)=315

Q: Skye High School has a total of 500 graduates.  The mean SAT score of Skye High School graduates is…

A: Given data,μ=947σ=205P(X≥1000)=?

Q: Each year students in a local school district write a national examination. The average on this…

A: Given data Mean = 150 Standard deviation=20

Q: Jason's z- score in the 10-k run was -3. if the raw score standard deviation was 5, and the mean…

A:

Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A: We have, X= A standardized​ exam's scores the mean test score was 1549 and the standard deviation…

Q: A class has an equal number of boys and girls. The boys all got 78% on a test and the girls all got…

A: From the provided information, Boys got 78% on a test and girls got 84%. Let n = number of girls =…

Q: the scores in a sample that has a standard deviation of z

A: The standard deviation is used to calculate the variability of the data set. It tells us about the…

Q: As an electrical engineer, you have designed a new efficient light bulb. In order to predict its…

A: Formula  Used: Mean X = ∑FX∑F Standard deviation = ∑FX2-nX2∑F-1

Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…

A:

Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

A:

Q: there are 75 students in the class and 20 students are getting a+ grade in the class find the mean…

A: