A sample of 20 part-time workers had mean annual earnings of $3120 with a standard deviation of $677. Construct a 95% confidence in population mean, u. Assume the population has a normal distribution. Round to the nearest dollar. A. ($2135, $2567) B. ($1324, $1567) OC. ($2803, $3437) O D. ($2657, $2891)

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A: The data of the daily sales of restaurant for the 10 day is given as: 18,500  23,600  21,210…

Q: Recent Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested…

A: Given that Mean(µ) = 24.8 Standard deviations (σ) = 6.2

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A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: The annual commissions per salesperson employed by a retailer of mobile communication devices…

A: From the provided information, Mean (µ) = $43600 Standard deviation (σ) = $4600

Q: A survey of 1000 men ages 20 to 30 found that their heights were normally distributed, with a mean…

A: Solution: Let X be the height of men ages 20 to 30. From the given information, X follows normal…

Q: Calculate the sample standard deviation of the data shown. Round to two decimal places. 21 15 25 17…

A: Given data set: 21, 15, 25, 17, 24, 30 Number of observations = 6

Q: Consider a sample with a mean of 30 and a standard deviation of 5. Use Chebyshev's theorem to…

A:

Q: Statewide, the average score on the verbal test portion of the college exam is 453, with a standard…

A: From the given information, the sample size is 137, sample mean is 502, population mean is 453 and…

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: Step-by-step procedure to obtain descriptive statistics using EXCEL Add-Ins: Go to Data>Data…

Q: Match the histograms on the right to the summary statistics given. 20- Standard Deviation Мean…

A: For the given histogram the right to the summary statistics given

Q: Find the mean, mode and standard deviation of the distribution.

A: Given: f(x)=1x2πe-12logx2      for x>0       =0  for  x<0

Q: The weights of 60 females in a physical education class are normally distributed with a mean of 135…

A: Obtain the Z-score for the random variable X equals 150 The Z-score for the random variable X equals…

Q: The systolic blood pressure of 18-year-old women is a roughly bell-shaped distribution with a mean…

A: We have given that.   X~N( μ , ?^2 )   μ =120 , ? =12   Z-score =( x - μ )/?

Q: According to a government study, among adults in the 25- to 34-year age group, the mean amount spent…

A: Given : The mean amount spent per year on reading and entertainment is $1,994. Assume that the…

Q: A sample of weights (in pounds) for six 12-year-olds is given below:   97 75 91 83 80 96   Find…

A:

Q: The annual commissilons per salesperson employed by a retailer of mobile communication devices…

A: Let X be the random variable from normal distribution with mean (μ) = $ 41200 ans standard deviation…

Q: The prices of all college textbooks follow a bell- shaped distribution with a mean of $100 and a…

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Q: The mayoral office surveyed the number of people who use each of the city's public shelters every…

A:

Q: For a mean of 70 and a standard deviation of 8, find standardized score for a value of 80. O - 1.25…

A: From the provided information, Mean (µ) = 70 Standard deviation (σ) = 8

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: It is given that the mean and standard deviation are 50,000 and 12,000, respectively.

Q: Find the Median of the data set Compute the Standard deviation. (i)

A: To find the median we have to arrange the data set first.  That is: 15   17   18   19   20   31   33…

Q: On a normal distribution, four participants obtained the following deviation scores: –5, 0, +3, and…

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Q: The mean length of a human pregnancy is 267 days, with a standard deviation of 12 days. Use the…

A: Given data,Mean μ=267sd σ=12P(243<X<291)=?

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A: From the given information, we have mean = 11830 Standard deviation = 2370 We have to find the…

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Q: In a normally distributed data set a mean of 55 where 95% of the data fall between 47.4 and 62.6,…

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Q: Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P(x 93)? O A.…

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

A: Given Margin of error=1 Standard deviation=3.6 Significance level=0.05

Q: In a statistics class of 150 students, the mean and standard deviation of scores was 70 and 5,…

A: Given: The total number of students are N=150. The mean scores of students in a statistics class is…

Q: The mean length of a human pregnancy is 265 days, with a standard deviation of 14 days. Use the…

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Q: In terms of resale value, is remodeling a kitchen worth the cost? The following cost and resale…

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Q: Consider the normal distribution of IQs with a mean of 100 and a standard deviation of 16. What…

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Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

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Q: Given that the mean weight of senior high school students is 65kg with a standard deviation of 10.…

A: Given information Population mean µ = 65 kg Standard deviation σ = 10 We have to determine the…

Q: At the local liquour store, a single purchase approximately follows a normal distribution with a…

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Q: calculate the standard deviation of the following four observations: 13,14,16,18

A:

Q: A sample of weights (in pounds) for six 12-year- olds is given below: 90 75 85 85 97 91 Find the…

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Q: The percentage of observations that are contained within 3 standard deviations of the mean is O a.…

A: As per the empirical rule for normal distribution, 68%, 95%, and 99.7% of the values lie within one,…

Q: The weights of 60 females in a physical education class are normally distributed with a mean of 135…

A: We want to tell you which one is the correct choice.

Q: When comparing two​ populations, the larger the standard​ deviation, the more dispersion the…

A: Note: Thank you for the question. Since only the statement is given, we have considered it as a true…

Q: A college professor noted that the grades of his students in an introductory statistics class were…

A: Given that, Mean = 52.50 Standard deviation = 9

Q: Suppose the heights of the members of a population follow a normal distribution. If the mean height…

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

A:

Q: The mean length of a human pregnancy is 269 days, with a standard deviation of 10 days. Use the…

A: According to empirical rule.

Q: calculate the standard  deviation for the following data set   2  4   3    7    2   roundup to 2…

A: A mean of a data set is the average value of the data. The mean of a dataset is computed by dividing…

Q: Find the median and the standard deviation of the scaled marks of all the students.

A: According to the answering guidelines,  we can answer only one question and the rest can be…

Q: John beale of stanford, ca, recorded the speeds of car driving past his house, where the speed limit…

A: Given: μ=23.84σ=3.56 a) The Z score is obtained as below: z=x-μσ=20-23.843.56=-3.843.56=-1.08 Thus,…

Q: The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution…

A: From the provided information, Mean (µ) = $78,000 Standard deviation (σ) = $11,000 Let X be a random…

Q: A survey of 1000 men ages 20 to 30 found that their heights were normally distributed, with a mean…

A: From the provided information, Mean (µ) = 65 inches Standard deviation (σ) = 2.5 inches

Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.