How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1 C. 2 D. 3

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

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Q: For a sample of n = 30 scores, a score that is 6 points above the mean has a z-score of z = 1.50.…

A: For a sample of n = 30 scores, a score that is 6 points above the mean has a z-score of z = 1.50.

Q: For a sample with M= 80, a score of X= 88 corresponds to z =2. what is the sample standard deviation…

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Q: How many standard deviations to either side of the mean must we go to ensure that, for any data set,…

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Q: How many observations would fall beyond two sample standard deviations below and above the sample…

A: We know that , If observations of data is 2 standard deviation  below the mean then we will have…

Q: How many standard deviations to either side of the mean must we go to ensure that, for any data set,…

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Q: In a population of scores, X = 83 corresponds to z = 0.50 and X = 93 corresponds to z = +2.00. What…

A: We have to find mean and sd.

Q: For a sample with mean M=80,  a score of X=88 corresponds to z=2. What is the standard deviation?

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Q: e a sample of 25 hamburgers and weigh them, we find that the mean is 0.57 pounds and the standard…

A: Given that  (a) sample size (n) =25     Sample mean (x¯) = 0.57 pounds     Standard deviation (s)…

Q: (d) If the sample size is n= 16, what is the standard deviation of the population from which the…

A: Using central limit theorem.

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

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

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Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size is…

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Q: A student learns that on his most recent exam in psychology, the sample mean was 72.19 with a…

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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: Given,mean(μ)=50standard deviation(σ)=8

Q: 9) In a class of 30 students, how many students failed the test (below 64), if the mean grade on a…

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Q: For a random sample of 40 students, the average statistics midterm score is 73 points (out of a…

A: The sample size is 40, average statistics midterm score is 73 points, and standard deviation is 7.3.

Q: A researcher wishes to determine how much money per week is spent on groceries in a small Western…

A: Given : ME< 3.0 σ= 18.0 At 98.0 % confidence level , z score= 2.326 Need to find the minimum…

Q: Given a population of 5000 scores with a mean of 86 and a standard deviation of 10, how many scores…

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Q: 95% of 80 night students scored between 70% and 80% on a quiz. If this data is normally distributed,…

A: Given: Total number of students n=80.             let X  denote the marks of students then,  X ~N(µ,…

Q: What is the average score for those who say they are an employee who others can depend on with the…

A: Average score: The general formula to obtain the expected value (mean) of a discrete random variable…

Q: Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard…

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Q: For a random sample of 9 women, the average resting pulse rate is x-bar = 76 beats per minute, and…

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Q: About 68% of the data lie within. standard deviation of the mean One Two Three Four

A: Let X be a random variable follows normal distribution with mean µ and standard deviation σ. X~N (µ,…

Q: A score that is 9 points above the mean corresponds to a z-score of z = 1.50. What is the population…

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Q: The scores on a driver's test are normally distributed with a mean of 100. Find the score that is 3…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 28 X~N (100, 28)

Q: given a population of 5000 scores with mean is 86 and the standard deviation is 10, how many scores…

A: To solve this problem, we have to assume that the population is normally distributed. Let X denotes…

Q: 2. In a departmental examination on statistics, the mean grade was 64 and the standard deviation was…

A: Determine the number of students took the examinations.   The number of students took the…

Q: For a random sample of 10 men, the mean head circumference is x-bar= 57.3 cm and the sample standard…

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Q: Given a scenario where n=100 and p=0.8, find the standard deviation.

A: In this case the sample size is n = 100 and p = 0.8.

Q: Suppose  X ~ N(5, 2).  What value of x is three standard deviations to the right of the mean? (Enter…

A: We have given that  X~N(5,2).

Q: а. How many of the women have a height that is within 1 standard deviation of the mean? b. How many…

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Q: For a sample of n = 20 scores, X = 25 corresponds to z = -1.20 and X = 40 corresponds to z = +1.80.…

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Q: What is the z-score of x = 3 if it is 2 standard deviation to the left of the mean? O -3 O -2 O -1 O…

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Q: A data set is normally distributed with a mean of 6363 and a standard deviation of 10.4.10.4. What…

A: Let X be the data value which follows normal distribution with mean 63 and standard deviation 10.4.…

Q: 4. The variance of a data set is 3410.56. Find the standard deviation for the data set.

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

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Q: The population has a mean of 120 and a standard deviation of 12. The sample size of your sampling…

A: The provided information are: Population mean (µ) = 120 Population standard deviation (σ) = 12…

Q: On a measure of​ anxiety, the mean is 83 and the standard deviation is 12. What are the Z scores for…

A: Given: Mean (M) = 83 Stndard deviation (SD) = 12 Formula:

Q: If you draw a sample of 200 from a normal distribution and using the empirical rule; how many data…

A: Empirical rule: On a normal distribution about 68% of data will be within one standard deviation of…

Q: Suppose X ~ N(3, 1.2). What value of x is two standard deviations to the right of the mean?

A: from given distribution in question,   mean :-μ=3 standard deviation :-σ=1.2 X is two standard…

Q: What value of x is two standard deviation to the right of the mean if X ~ N(10, 1)? O 1 O 2 O 4 0 6…

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Q: What is the value of the Pearson coefficient of skewness for a distribution with a mean of 27,…

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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: GivenMean(μ)=50standard deviation(σ)=8z=2.50

Q: 3. In the qualifying examination for the admittance to college, the mean score was 65 and the…

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

Q: The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size…

A: The standard error of mean is, SE = σ/√n, where σ is the standard deviation and n is the sample…

Q: The average score on a test of 40 students has a mean score of 53 and a standard deviation of 6. At…

A: Answer - The average score on a test of n = 40 Student has a mean score μ = 53  and σ = 6…

Q: For a random sample of 10 men, the mean head circumferences are x-bar = 57.3 cm, and the sample…

A: Given data:   The given sample size is n=10. The given mean head circumference is x=57.3 cm. The…

Q: If the mean of the variable Depression is 32 and its standard deviation is 6, which of the following…

A: Ans#- Given, If the mean of the variable Depression μ = 32 and its standard deviation σ = 6,…