A quantitative data set of size 80 has mean 30 and standard deviation 6. Approximately how many observations lie between 12 and 48​?

Q: On a standardized test, scores are normally distributed with a mean of 400 and a standard deviation…

A: Given data,μ=400σ=80P(X<x)=80%=0.80x=?

Q: All of the below sets have the same mean.       Set 1-Standard Deviation=3.1       Set 2-Standard…

A:

Q: A quantitative data set of size 70 has mean 25 and standard deviation 4. at least how many…

A: It is given that the mean is 25 and standard deviation is 4.

Q: A quantitative data set of size 150 has mean 35 and standard deviation 4. At least how many…

A:

Q: "For a population with a mean = 375 and a standard deviation = 25, what is the X value corresponding…

A: From the provided information, Mean (µ) = 375 Standard deviation (σ) = 25 X~N (375, 25)

Q: The data set has 250 observations and has mean 100 and standard deviation 16. Approximately how many…

A:

Q: A quantitative data set of size 200 has mean 20 and standard deviation 4. At least how many…

A:

Q: A quantitative data set of size 80 has mean 30 and standard deviation 5. At least how many…

A: Given information- Sample size, n = 80 Mean, μ = 30 Standard deviation, σ = 5 We have to find the…

Q: Claim: the mean plus rate (in beats per minute) of adult males is equal to 69.3 bpm. For a random…

A: Given: Claim: the mean plus rate (in beats per minute) of adult males is equal to 69.3 bpm

Q: If there is a small amount of variation, then the standard deviation is what

A: Standard deviation: It is defined as the positive square root of the variance. It fulfils requisites…

Q: A quantitative data set of size 80 has mean 35 and standard deviation 33. At least how many…

A: It is given that the mean and standard deviation of the quantitate data set are 35 and 33,…

Q: 7. If you made only n = 1 measurement of rack height, the standard deviation of the measurement…

A: Solution: 7. From the given information, n = 1.

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

A:

Q: A quantitative data set of size 60 has mean 45 in standard deviation six. Approximately how many…

A: Given observation Sample size = 60 Mean = 45 Standard deviation = 6 finding the value of z

Q: A quantitative data set of size 70 has mean 25 and standard deviation 33. At least how many…

A: It is given that the mean and standard deviation of the data set are 25 and 33, respectively. The…

Q: If the mean height of bonsai trees is 52 cm with a standard deviation of 10 cm, 95% of the trees are…

A: NOTE : As per our guidelines we have to answer the first question if multiple questions are posted…

Q: The weights of 1,000 children average 50kg and the standard deviation is 5kg. How many children…

A: Given  mu=50, sigma=sd=5, n=1000 We want to find How many children weigh between 40kg and 55 kg?

Q: the data set has a size 50, how many observations lie within 2 standard deviations of the mean

A: From the provided information, Sample size (n) = 50 The observations lie within 2 standard…

Q: A quantitative data set of size 87 has mean 80 and standard deviation 10. At least how many…

A: To obtain standard deviation distance from mean to 100,

Q: Apply Chebyshev’s rule to solve. A quantitative data set of size 150 has mean 35 and standard…

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

Q: If the mean is 8, then the mean absolute deviation of the scores 10 9 3 8 10 is?

A: Given mean (μ) = 8 Then Mean Absolute Deviation is given by  1n∑xi-μ

Q: A quantitative data set of size 80 has mean 45 and standard deviation 2. Approximately how many…

A: The given values are, The formula for calculating the value of k is, The values of k are,

Q: A data set with roughly a bell-shaped distribution has mean 45 and standard deviation 12.…

A: The percentage of the observations lie between 33 and 57 is obtained below:Let X be an observation…

Q: A set of data is normally distributed with a mean of 327327 and a standard deviation of 27.27. What…

A: Given:

Q: If the coefficient of variation is 1% and the mean is 3.2, determine standard deviation (to four…

A: We have given that Mean(x̅) = 3.2 CV = 0.01

Q: A quantitative data set of size 70 has mean 35 and standard deviation 5. At least how many…

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: The data set has 80 observations and has mean 30 and standard deviation 5. Approximately how many…

A:

Q: A quantitative data set has mean 19 and standard deviation 2. Approximately what percentage of the…

A: Given that, A quantitative data set with, Mean = 19 Standard deviation = 2

Q: A quantitative data set has mean 15 and standard deviation 2. what is percentage lies between 13 and…

A: Note: Thank you for the question. For the calculation, it is assumed that the quantitative data set…

Q: The data set has 150 observations and has mean 35 and standard deviation 4. Approximately how many…

A:

Q: A group of patients has a mean height of 160 cm and a standard deviation of 10 cm. What standard…

A: Determine the standard score that would cut off the lowest 50% of scores. The standard score that…

Q: Assume that a nomral distribution has a mean of 22 and a standard deviation of 7. What percentage of…

A:

Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.

Q: The data set has 200 observations and has mean 20 and standard deviation 4. Approximately how many…

A: It is given that the mean is 20 and the standard deviation is 4.

Q: A quantitative data set has mean 15 and standard deviation 2. At least what percentage of the…

A: It is given that the mean is 15 and standard deviation is 2.

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

A: Here I am providing my handwritten solution

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

A: deviations from mean are more for set A 1-13, 2-13, 3-13, 23-13, 24-13, 25-13, -12, -11, -10, 11, 12…

Q: What is the best approximation of the standard deviation ofthe measures -4, -3.0, 8, and 9?

A: Solution: Let X be the measure. The given data is –4, –3, 8 and 9.

Q: The data set of size 40 has mean 15 and standard deviation 2. Approximately how many observations…

A: Given Information Mean (µ) = 15 Standard deviation (σ) = 2 Finding the probability for scores that…

Q: A quantitative data set of size 60 has mean 50 and standard deviation 66. Approximately how many…

A: If the distribution is bell shaped, the Empirical Rule can be used. The Empirical rule provides the…

Q: The data set has mean 30 and standard deviation 4. Approximately what percentage of the observations…

A: The provided information are: Population mean (µ) = 30 Population standard deviation (σ) = 4

Q: Assume that the Leaf Area Index over a management area is normally distributed with a mean of 3 and…

A: Sample mean = M = 3 Standard details = s = 0.2

Q: Suppose that the heights of adult men in the United States are normally distributed with a mean of…

A:

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

A: Given that Coefficient of variation, C.V =  35% And the standard deviation is SD = 32

Q: The data set has mean 15 and standard deviation 2. Approximately what percentage of the observations…

A:

Q: a quantitative data set has mean 25 and standard deviation 5. what percentage of the observations…

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: The weights of tablets are normally distributed with mean 254 mg and standard deviation 4 mg.…

A: Given that  The weights of tablets are normally distributed with mean 254 mg and standard deviation…

Q: The variance in a data set is 427. Find the standard deviation. Round to two decimals.

A: The random variable is X. It is given that the variance is 427. We have to find the standard…

Q: What are all the values that standard deviation "s" can possibly take?

A: Standard deviation S=x1;x2n-1and ,Standard deviation is the positive squarew root of the variance…