Some managers of companies use employee rankings to laud the best and let go of the worst. Suppose the distribution of rankings of employees at a large company is normal with a mean of 65 points and a standard deviation of 6 points. Using the model for rankings, what is the cut-off for the company to let go of an employee? A. 10.0 B. 57.31 C. 70.05 D. 80.00

Q: Calculate coefficient of quartile deviation and coefficient of variation from the following data…

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Q: 6. The data set below shows the cost of a gallon of milk in dollars in 5 different cities. Which of…

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Q: Complete the sentence below. The standard deviation of the sampling distribution of x, denoted o,,…

A: Given : The formula for the standard error of the mean is  = σ/√n

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Q: College freshmen took a psychology exam. If the mean is 80, the standard deviation is 10, and the…

A: Given mean = 80  And , Standard Deviation = 10

Q: Consider the following sample data.       Sample A: 10, 17, 24 Sample B: 68, 75, 82 Sample C:…

A: There are three samples given. Sample A 10, 17, 24 Sample B 68, 75, 82 Sample C 1035, 1042,…

Q: Given are 3 observations for the monthly profits (in 1000s) for a group of small businesses.…

A: We have given that,  The data is,  28, 29, 22 Then,  We will find the standard deviation (s) = ?

Q: A) What percent of car sales amounts are between $11,700 and $18,900? B) 99.7% of all people paid…

A: For a normal distribution with mean μ and standard deviation σ, we have: P(x<=a) =…

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

A: According to Chebyshev's rule, within 10 standard deviations from mean, lies at least 99% of the…

Q: Consider the following sample data Sample A: 10, 17, 24 Sample B: 68, 75, 82 Sample C: 1,035, 1,042,…

A: given that Sample A 10, 17, 24 Sample B 68, 75, 82 Sample C 1035, 1042, 1049

Q: Consider the following sample data.       Sample A: 5, 11, 17 Sample B: 76, 82, 88 Sample C: 1,075;…

A: Sample A: 5,11,17 The mean of the sample A is, The standard deviation of the sample A is,

Q: A random sample of 15 college students were asked​ "How many hours per week typically do you work…

A: we will form the frequency table of the given data after arranging them into ascending order

Q: Suppose that the distribution of a set of scores has a mean of 47 and a standard deviation of 14. If…

A: Here, mean is 47 and a standard deviation is 14.

Q: Suppose the distribution of a quantitative variable is heavily right-skewed and contains a low…

A: The choice of numerical summary depends on the shape of the distribution.

Q: The table on the right gives the annual income for eight families, in thousands of dollars. Find the…

A: Given that following data Family Income x A 49 B 51 C 46 D 48 E 47 F 48 G 45 H 50…

Q: 609001 2 51800

A: Given : The data given is as below 60900 51800 47500 42700 34600 31400 30500 29900…

Q: Given that the mean of a data set is 20, and the standard deviation of this data set is 8, then what…

A: Solution : Given : μ = 20             σ = 8             X = 40 The value of Z-score can be computed…

Q: The following frequency distribution shows the score of sample of students in math class Class…

A: We have given that data  Median = middle value of the data set.

Q: The distribution of the weights of patients at a local urgent care clinic is Normal, with a mean of…

A: a) The probability that  is equal to the blue area under the curve. Since μ = 150, σ = 10.6…

Q: Which of the following can be thought of as the “average deviation”? a. Sum of Squares b. Variance…

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Q: Some managers of companies use employee rankings to laud the best and let go of the worst. Suppose…

A: Obtain the Z-score for the random variable X equals 59.   The Z-score for the random variable X…

Q: According to Chebyshev's theorem, what is the maximum proportion of data values from a data set that…

A: We know that the Chebychev's inequality states that the P(|X-μ|>kσ) < 1/k2 It can be seen as…

Q: Consider the following sample data.       Sample A: 7, 14, 21 Sample B: 77, 84, 91 Sample C: 1,080;…

A:

Q: The time spent by a teacher at work in the holidays is normally distributed with a mean of 20 hours…

A: X: time spent by a teacher at work in the holidaysX~N(μ,σ)Mean(μ)=20 hoursstandard deviation(σ)=5…

Q: (a) Find the mean and standard deviation for each sample.     Sample A: Sample B: Sample C: Mean…

A: From provided information, data is; Sample A 14 16 18 Sample B 72 74 76…

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

A:

Q: Consider the following sample data. Sample A: 13, 23, 33 Sample B: 71, 81, 91 Sample C: 1,050;…

A: Given data: Sample A: 13, 23, 33 Sample B: 71, 81, 91 Sample C: 1,050; 1,060; 1,070 To…

Q: Using Chebyshev's rule, at least what percent of the distribution lies between 3 standard deviations…

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Q: for the set of scores 10 15 20 20 15 calculate the range variances and standard deviation by hand

A: Given that ; scores(x) ; 10 15 20 20 15 By using formula  Range = highest value - lowest value…

Q: A survey research company asks 100 people how many times they have been to the dentist in the last…

A: The given table can be filled by using EXCEL software as given below. Where “xbar” is the mean…

Q: Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample…

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Q: review(16b): The amount of jens monthly phone bill  is normally distributed  with a mean score of…

A: Given that.   X~N( μ , ?^2 )   μ=70  , ?=12

Q: What is the value for a score that has a z= +1.5 from population with a mean of μ=30 and a standard…

A: Z score = +1.5 Mean = 30 Standard deviation = 6

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

A: X X^2 P(X) XP(X) X^2P(X) 0 0 0.183 0 0 1 1 0.357 0.357 0.357 2 4 0.305 0.61 1.22 3 9 0.122…

Q: review(16a): The amount of jens monthly phone bill  is normally distributed  with a mean score of…

A: In question, given that The amount of jens monthly phone bill  is normally distributed  with a mean…

Q: The bar graph below summarizes information aNew York City Survey of Elementary School Children(NYC…

A: If X is the number of children among 400 Hispanic NYC school children that are obese,then…

Q: Calculate coefficient of quartile deviation and coefficient of variation from the following data :…

A:

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

A: Given,

Q: The following data are the marks for a sample of 5 students in Mathematics Exam. 19, 11, 12, 29, 18…

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Q: A sample of voters in a town are classified by age groups, as shown by the following: Age Group 21 –…

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Q: Calculate quartile deviation and the coefficient of quartile deviation from the following data:…

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Q: The average number of days spent on the road for business by business travellers is 115 per year.…

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Q: Suppose a normal distribution has a mean of 38 and a standard deviation of 2. What is the…

A: Let X be the random variable from normal distribution with mean (μ) = 38 and standard deviation (σ)…

Q: Consider the following two sets of sample data: A: 33, 42, 51, 54, 66, 78 B: 2, 4, 9, 5, 6, 10 The…

A: Solution: From the given information, the standard deviation of A is 16.2 and the standard deviation…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

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Q: The typical amount of sleep per night for college graduate students has a normal distribution with a…

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Q: Source: Chronicle of Higher Education. 7. Medical Operations The director of a medical hospital…

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Q: Consider the following sample data. Sample A: 5, 11, 17 Sample B: 76, 82, 88 Sample C:…

A: From the provided information, Sample mean and standard deviation of data A can be obtained as:

Q: Consider the following sample data.  Sample A: 8,13,18 Sample B: 66,71,76 Sample C: 1,025,…

A: From the given information, the 3 samples are as follows:   A B C Samples 8, 13, 18 66, 71, 76…