Answer the following by using the z-table from class. People spend an average of 7 hours per day on their home computers with a standard deviation of 1 hour. What proportion spends at least 5 hours per day on their home computers?

Q: The ages (in years) of a random sample of shoppers at a gaming store are given below: 12 2 23 15 20…

A: Let us define X as the given observations. X: 12, 21, 23, 15, 20, 16, 19, 17, 14, 16. Consider,…

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: Suppose IQ scores are approximately normally distributed with a mean  of 100 and a standard…

A: Given, Mean =μ=100SD = σ=15

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: Use the following data to answer the first two questions. The test scores for a sample of five…

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Q: Find the mean and standard deviation for the numbers of sleepwalkers in groups of five.

A: Given: X P(x) 0 0.175 1 0.357 2 0.318 3 0.118 4 0.028 5 0.004

Q: The following data are the distances from the workplace (in  miles) for the 5 employees of a small…

A: The distances from the workplace (in miles) for the 5 employees of a small business are given as:…

Q: Suppose the people living in a city have a mean score of 49 and a standard deviation of 77 on a…

A: Hello there! I see there are more than 3 sub parts in the question. According to our policies can…

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

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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: The following data relate to the age of a group of Govt. employees. Calculate the arithmetic mean…

A: Class Frequency (f) Mid value (x) d=X-Ahd=X-37.55A=37.5  ,   h=5 f⋅d f⋅d2 20 - 25 170 22.5 -3…

Q: Calculate the standard deviation of the data shown, to two decimal places 16.1 18.5 19.3 14.4 3.9…

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Q: Solve the following: Given the average age of a man which is 50 years old and has a diabetes with…

A: Provided information is ; Let X be the age  of man Average(μ)=50 years old Standard deviation(σ)=7…

Q: For example with m= 80, a score of x = 88 corresponds to z = 2.00.  What is the sample standard…

A: GivenMean(M)=80x=88z-score(z)=2.00

Q: The next four questions refer to the following scenario: A bank collected data of all its customers.…

A: Given Information: Good Credit: x¯=500 σ=75 Bad Credit: x¯=300 σ=75

Q: Use the data to answer the following questions: 10; 11; 15; 15; 17; 22 What number is two standard…

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Q: . The following dotplot shows the number of three-point shots made by each of the 30 NBA teams in…

A: Given information: The data represents the values of the number of 3-point shots made by each of the…

Q: 6. Which of the following statistics may be obtained even if not all the values in the data are…

A: Given problem Given that   Which of the following statistics may be obtained even if not all the…

Q: The following data are the percentages of alcohol in five randomly selected brands of beer. Find the…

A: Given: Sample size n = 5 Formula Used: Population standard deviation  σ = ∑i=1n(Xi-X)2n Where X is a…

Q: A grocery supplier believes that in a dozen eggs, the mean number of broken eggs is 0.5 with a…

A: Given : For a dozen of eggs :  E(X) = 0.5 SD(X) = 0.4

Q: There is concern about grade inflation, so the university was instructed to use standardized grades…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Here are the number of hours that each of a group of students studied for this exam: 2 4 22 2 1 4 1…

A: Solution Number of samples (n) = 10 Let "X" be the number of hours that each of a group of students…

Q: Which of the following statements is true regarding of the value that corresponds to the decile 6 of…

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Q: The following data were collected as part of a study of coffee consumption among graduate students.…

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

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Q: Given that the mean for a data set is 24.8 and the standard deviation is 2.3, find the z-score of…

A: It ia given that Mean = 24.8 SD = 2.3 Value X = 27

Q: Use the following information to answer the question. The mean age of lead actresses from the top…

A: Given that, μ=29.6 yearsσ= 6.35 years Let X denote the distribution of the actresses ages is…

Q: answer the following. a. From this data calculate the Mean, Median, Mode and Standard Deviation. b.…

A: 4. a. The descriptive analysis is conducted using EXCEL. The software procedure is given below:…

Q: If a researcher devises a test of emotional intelligence with a mean of 50 and a standard deviation…

A: We want to find the probability  P(40<X<50)

Q: The following are that scores of 20 students who took a calculus exam. Find the mean and standard…

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Q: Answer the three following questions a, b, and c. Taxes: The Internal Revenue Service reports that…

A: Given: μ = 8040 σ = 4700 n = 1000

Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…

A: We have given that  X~N( mu , sigma^2) mu=35.5  ,sigma = 2.5 Z-socre =(x-mu)/sigma

Q: Use the following excerpt to answer the questions below. In the state of California, there is an…

A: a) Here the hypothesis are given by H0: μ=7500 vs H1:μ>7500 b) Here the random variable follows a…

Q: Each of the variables displayed in the histograms below has a mean of 14.5, a range of 8, and 59…

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Q: (O) What is the standard deviation of a distribution that has a mean of 46.2 if a PERFORMANCE value…

A: From the provided information, Mean (µ) = 46.2 Performance value (x) = 28 Z score = -1.24

Q: Find the Quartile Deviation and its Coefficient from the following data, relating to the wéekly…

A: Given that  The data are50,70,80,60,65,40,90

Q: P(x) 0.186 1 0.362 0.295 3 0.128 0.027 4 5 0.002

A: From the provided information, The mean for the numbers of sleepwalkers in group of five can be…

Q: Calculate the standard deviation of the data shown, to two decimal places 14 10.2 15.8 20.6 6.9 5.9

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Q: As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a…

A: A continuous random variable X follows Normal distribution with parameters μ and σ2 if its…

Q: Answer the following by using the z-table from class. People spend an average of 7 hours per day on…

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Q: A group of five friends are long-distance runners who will be running in an upcoming marathon. To…

A: Given the data of number of miles run per week of 5 runners as shown below The runners with low…

Q: A sample of 10 networking sites for a specific month has a mean of 26.1 and a standard deviation of…

A: We have given , Mean = 26.1 and  standard deviation = 4.2, And Sample size = 10 . We have to find…

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: The following are body mass index (BMI) scores measured in 9 patients who are free of diabetes and…

A: Mean:The mean of the data is calculated as follows:

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

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Q: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a…

A: The following information has been provided: α=0.02,E=4,σ=5\alpha = 0.02, E = 4, \sigma = 5…

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

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