The mean of a data set is 20 and the standard deviation is 2. What percentage of data value will fall between 12 and 28? (Use Chebyshev's theorem). O A. 99.7% O B. 75% OC. 88.88% O D. 93.75%

Q: On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20. Give the…

A: Given data ,Mean u=300S.D σ=20

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A: X follows a Normal distribution with mean = 51.6 and S.D = 2.5 Then z=(x-mean)/SD = (x-51.6)/2.5…

Q: The average travel time to work for a person living and working in Kokomo, Indiana is 17 minutes. I…

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Q: Refer to the accompanying​ table, which describes the number of adults in groups of five who…

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Q: Both sets of values have an average of 13. Is Set A's standard deviation smaller, larger, or about…

A: Given : Set A: 1 2 3 23 24 25 Set B: 9 10 11 14 16 18 Both sets of values have an average of 13

Q: If a population has a standard deviation of 16, what is the minimum number of samples that need to…

A: Given,standard deviation (σ)=16margin of error (E)=2α=1-0.88=0.12α2=0.06Z0.06 =1.5548

Q: When n 2 30 and the population standard deviation is not known, what is the appropriate…

A: Given : n≥30 population standard deviation is not known.

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

A: I solved exactly first question because of bartleby policy if you want more please uplode…

Q: If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value…

A: If a set of data has a mean of 50 and the standard deviation of 4.5. We have to find the z-score for…

Q: The variance of a data set is 10. What is the standard deviation of the data set? O 10 O 3.16 O 100…

A: We can find the standard deviation as below

Q: A variable x has a mean, p, of 30 and a standard deviation, o, of 5. What is the standardized…

A: From the given information,   Mean = 30 Standard deviation = 5   The objective is to find the…

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A:

Q: use the following information for the question. The average travel time to work for a person living…

A: Let X denote the distribution of travel time and it follows normal distribution with mean of μ=17…

Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

A:

Q: A final exam for a Biology course has a mean of 80 and a stardard deviation of 3. Find the…

A: From the given information,   Mean = 80 Standard deviation = 3   The objective is to find the…

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: We have, the population mean, μ=100                the standard deviation, σ=15 Let X=IQ score

Q: On a test the mean score is 25 and the standard deviation is 2.3.  Which score could be expected to…

A: Mean =25 s = 2.3 z-critical value at alpha 0.05 is 1.65

Q: On a standardized test with a normal distribution, the me was 64.3 and the standard deviation was…

A: We have given that  The scores follow the normal distribution with mean 64.3 and standard deviation…

Q: The national mean for verbal scores on an exam was 428 and the standard deviation was 113.…

A:

Q: The average dog at a dog training facility takes 25 trials in order to learn how to sit, with a…

A: Given Information: Mean μ=25 Standard deviation σ=5.25 Required: To find the percentile for a dog…

Q: Based on the graph of this normal distribution. a) The mean is _____ .  b) The standard deviation…

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Q: If the coefficient of variation for a data is given as 35%, and the standard deviation for the same…

A: given data coefficient of variation = 35% so cv = 0.35 sd = 32 mean  = ?

Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

Q: and symmetric with a mean of 160 pounds and a standard deviation of 30 pounds. What percent of the…

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Q: The heights of students at a college are normally distributed with a mean of 175 cm and a standard…

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Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A: Given that, Mean, mu= 65 And standard deviation, sigma= 3.4

Q: Given the mean of GRE scores is 150 and the standard deviation is 8.8. What proportion of combined…

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Q: What is the value of k?   What is the standard deviation?

A: Here use basic of discrete probability distribution

Q: Given IQ scores are approximately normally distributed with a mean of 100 and  standard deviation of…

A: GivenMean(μ)=100standard deviation(σ)=15

Q: If a distribution has a mean of 35 and a standard deviation of 5, what value would be +1.5 standard…

A: Given that The value of mean of 35, Standard distribution of 5 and that correspond s to a z-score of…

Q: A quantitative data set has mean 25 and standard deviation 2. At least what percentage of the…

A: The Chebyshev’s rule states that, for any quantitative data set and any real number greater than…

Q: On a measure of artistic ability, the men for college students in new zealand is 150 and tthe…

A: Given mean = 150Standard deviation = 25The Z score is calculated using the below mentioned formula…

Q: What symbol is used for the standard deviation of a population? O a. X-bar O b.H O C. S O d. o

A: Standard deviation: The positive square root of the mean square of the deviations taken from the…

Q: An instructor gives a 100-point examination in which the grades are normally distributed. The mean…

A: Given : mean (μ) =65standard deviation (σ) = 12

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

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Q: :When a distribution is bell-shaped, approximately what percentage of data values Will Fall within 3…

A: We have to find correct answer.

Q: If a data value has a z-score of 3.00 and the mean of the distribution is 100 with a standard…

A: 1) Given data, z=3 μ=100 σ=15 X=?

Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

Q: Given that the mean weight of senior high school students is 65kg with a standard deviation of 10kg.…

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Q: Suppose the heights of the members of a population follow a normal distribution. If the mean height…

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Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: In question, Given that mu=50, Sigma= 8 and z score = -0.50 Then we'll find the value of raw score.…

Q: According to the table given below, for example, which of the following is its standard deviation?…

A: The formula for the standard error of the mean,

Q: the standard deviation of a sample of 50 observations equals 10. the variance of the sample equals?…

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Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A:

Q: The distribution of the number of dill pickle spears in a gallon container is approximately Normal…

A: Solution

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A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: According to Chebyshev's theorem, which of the following is the percentage of measurements in a data…

A: please see the next step for solution

Q: Which of the following is the correct formula for the margin of error of a population mean where the…

A: Introduction: It is required to identify the margin of error of a population mean for unknown…

Q: A standardized test has a mean of 88 and a standard deviation of 12. What is the score at the 90th…

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.