Answer the following: 1. What is the corresponding percentile and x- value that has a z-score = -2.3 with mean = 100 and standard deviation = 10 ?

Q: The Sales Ability Test that is given to employees at a magazine sales company has a population mean…

A: Let X represent the random variable Let us assume X follows Normal distribution   X~ Normal (80,…

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

A:

Q: At the shot put event the mean was a throw of 44.22 feet, with a standard deviation of 3.65 feet.…

A:

Q: A forester measured the trees in a large woods up for sale. He concluded that the diameter of the…

A: The objective of this question is to identify the correct equation that can be used to find the…

Q: The life of a 9-volt battery is normally distributed with a mean of l = 2000 hours and a standard…

A:

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: What percent of data points fall in the range of z=-1.5 and z=1.5 standard deviations of the mean

A: From the provided information, The range is between z = -1.5 to z = 1.5

Q: A successful basketball player height is 203 cm. His converts to the z score of 4.10. How many…

A: Consider, X = 203  z-score = 4.10 z-score is a numerical value that tells the number of standard…

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: Assume that adults have IQ scores that are normally distributed with a mean of 99.2 and a standard…

A: Given info: IQ scores are normally distributed with a mean of μ=99.2 and a standard deviation…

Q: A score that is 12 points below the mean corresponds to a z-score of z= -1.50. What is the standard…

A: Given that, A score that is 12 points below the mean corresponds to a z-score of z= -1.50.

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: Use the normal distribution of heights of adult​ women, which has a mean of 168 centimeters and a…

A: Mean(µ) = 168Standard deviations (σ) = 5X ~ N (µ, σ )= N(168,5)

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

A: Introduction: The fashionable regular distribution, additionally called the z-distribution, is a…

Q: The life of a 9-volt battery is normally distributed with a mean of U = 2000 hours and a standard…

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: scores are normally distributed with mean 500 and standard deviation 100. Julie scores 650. Her…

A: Consider X be the random variable representing the SAT scores. X follows normal distribution with…

Q: Assume the cholesterol levels of adult American women can be described by a Normal model with a mean…

A: According to the given information, we have Mean = 188 mg/dL Standard deviation = 24 mg/dL

Q: In a population with mean 50 what standard deviation score would have a score of X=45

A:

Q: The distribution of reading scale scores in the 4th grade at Roosevelt Elementary School was…

A: Givenμ=221σ=36

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: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: The final exam is worth 200 points with the usual 10% grading scale. Assume that the final exam…

A: Given Information: Mean (u) = 161 points Standard deviation (s) = 22

Q: The distribution of SAT scores is normal with a mean of 550 and a standard deviation of 120. What…

A: The distribution of SAT scores is normal with a mean of 550 and a standard deviation of 120. What…

Q: The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5.…

A:

Q: The birthweight of German Shepherd puppies is normally distributed with mean 509.3g and standard…

A: Here is given that mean is 509.3 and standard deviation is 96. We use z - scores for finding…

Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

Q: he mean on an exam is 80 with a standard deviation of 5 points. If Joe scored a 90 on the exam, what…

A: given data, μ=80σ=5x=90 z score for the given data=?

Q: For a social club, the members had a mean age of 68 and a standard deviation of 10 years.  What is…

A: The mean is 68 and the standard deviation is 10.

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: Assume that adults have IQ scores that are normally distributed with a mean of 95.4 and a standard…

A: Let "X" be the IQ score of adults. Draw the normal curve and shade the area of 0.25 to the left…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: The mean composite score for seniors who took the SAT in 2010 was 1068. If the standard deviation…

A: From the provided information, Mean (µ) = 1068 Standard deviation (σ) = 100

Q: A test score of 36 has an equivalent standard score (z-score) of -2.4. If the standard deviation is…

A:

Q: A sample data has mean x ̅ = 75 and standard deviation s = 10: i. What percent of the data that is…

A: Given:Sample mean x ̅ = 75 and Standard deviation s = 10We have to find P(X > 95 ) = …?

Q: If the mean of x bar is equal to 15.3 and the standard deviation of x bar is 1.20, what is the…

A:

Q: You are provided with a mean of 28.18 with a standard deviation of 4.33.  What percent of students…

A:

Q: Answer the following questions using the z-score chart( attached below) or by using a spreadsheet.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.7 and a standard…

A: Given Data : Population Mean,μ = 100.7 Population Standard Deviation,σ = 18.9

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a score of 143.…

A: Given that Mean=M=152, Standard Deviation=Sd=16, Jenny score=X=143