The mean price of new homes from a sample of houses is $155,000 with a standard deviation of $15,000. The distribution is bell-shaped. What percentage of the house prices fall between $140,000 and $185,000. Explain your reasoning. Calculate a z-score for a price of $150,000.

Q: Why is the standard deviation preferable to the range as a measure of variation?

A: A range is the most common and easily understandable measure of dispersion. It is the difference…

Q: In a college class, the average IQ is 115. Assume that the distribution is normal and that the…

A: In a college class, the average IQ is 115. Assume that the distribution is normal and that the…

Q: On a nationwide math test, the mean was 75 and the standard deviation was 7. If Roberto scored 70,…

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Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90

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Q: On a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 90,…

A:

Q: The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words…

A: Mean = 125 Standard deviation = 24

Q: Find the Z-Score for a IQ  test score of 142 when the mean is 100 and the standard deviation is 15.

A: It is given that the mean and standard deviation are 100 and 15, respectively. The IQ test score is…

Q: On a nationwide math test, the mean was 57 and the standard deviation was 10. If Roberto scored 80,…

A:

Q: What is the mean of the distribution? What is the standard deviation of the distribution?

A: Given Mean1=30 Mean2=27 n1=41 n2=57

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A: The z score explains the deviations of the observations from the mean. It is calculated using the…

Q: According to Chebyshev's rule, within 10 standard deviations from the mean, lies at least of any…

A: Given Information: According to Chebyshev's rule, within 10 standard deviations from the mean, lies…

Q: What is the mean reading? What is the standard deviation?

A: A function f(x) is said to be a probability density function if f(x) ≥ 0 and ∫f(x)dx = 1. Consider…

Q: The standard deviation of 15 scores was 5 and the mean was 85. What was the variance?

A: We have given that  N=15 Mean=85 Standard deviation=5 Note: According to Bartleby Expert guidelines,…

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A: GivenMean(μ)=63standard deviation(σ)=10score(x)=85

Q: A data set has size of 40. How many observations lie within two standard deviations of either sides…

A: The 68-95-99.7% (Empirical) Rule: For a normal distribution, the empirical rule (68-95-99.7% Rule)…

Q: Pearson revises books each semester and the mean number of pages for 2010 is 568 with a standard…

A: Let, X= number of pages  Given that X follows normal distribution with mean= 568 and standard…

Q: Suppose you were told you scored two standard deviation below the mean on a measure where the main…

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Q: What is the sum of the deviation scores for the data in the frequency distribution table below?

A: Sum of deviation  of scores from mean is always zero.

Q: What is the corresponding Z score ? Mean is 70, standard deviation is 10 and X= 89

A: We have to find z score.

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Q: What is the mean and standard deviation?

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Q: A line for tickets to a broadway show had a mean waiting time of 20 minutes with a statistic…

A: Given: Mean,  μ=20 Standard deviation, σ=5 Sample size, n= 200 Use normal approximation here, the…

Q: what does the mean and the standard deviation represent in data set? how would i interpret the…

A: Mean and standard deviation in data set:The mean represent the average value in a data set. In other…

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: The mean grade of Adrian in the standard deviation was 7. In Science, his mean grade was 89 and the…

A:

Q: In a data set with a normal distribution, the mean is 98 and the standard deviation is 12. About…

A: Given: Mean, μ=98 Standard deviation, σ=12 To find: P (74 < x < 122) Therefore, P…

Q: On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90,…

A: Formula for z-score is

Q: what is the mean and standard deviation?

A:

Q: When a distribution is bell-shaped, approximately what percentage of data values fall within 1…

A: We know that, the empirical rule which is also known as 68-95-99.7 rule.  The Empirical Rule finds…

Q: Which average - mean, median, or mode - is associated with the standard deviation?

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Q: At Thomas Nelson Community College, the Pre-Test for Mathematics has 200 points on the test. The…

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Q: PROVIDE TYPED ANSWER  What is the mean age among men? What is the standard deviation (SD) of age…

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Q: What percentage of the widget Weights lie between 55 and 79 ounces when the mean is 61 and the…

A: We have to  given probability...

Q: What is the mean age among men? What is the standard deviation (SD) of age among women? Is there any…

A: 1. Here we need to find the mean age among men. Here if we check the "Men" column and "Age in years"…

Q: Can you find the mean and the standard deviation?

A: To find the mean and standard deviation of the given data: Mean is the sum of observations divided…

Q: The mean grade of in the final examination in Mathematics was 85 and the standard deviation was 7.…

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

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A:

Q: After calculating the mean and standard deviation, how do we interpret the result, and when a…

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Q: What does the standard deviation tell you about a set of data?

A: Given To explain the standard deviation tell you about a set of data.

Q: According to the Department of Education the mean number of hours college students spend studying…

A:

Q: Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 85?

A:

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A: It is given that mean and standard deviation are 530 inches and 80, respectively.

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