The outputs of 12 selected Keurig coffee makers are listed below. The quality control  needs the standard deviation to be low. Construct a 98% confidence interval for the  population standard deviation, σ.  11.85, 11.96, 11.9, 11.92, 12.01, 11.95, 11.96, 11.89, 11.97, 12.03, 11.88, 11.94

Q: Housing prices in a small town are normally distributed with a mean of $139,000 and a standard…

A: According to the given information in this question We need to apply empirical formula

Q: Find a 90%confidence intervalfor thế populadofn stan

A: (1-α)100% confidence interval for σ2 is                                                        First…

Q: The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants…

A: Sample points are 9.0,7.3,6.0,8.8,6.8,8.4,6.6. Sample size = n = 7.

Q: Calculate a 95% upper confidence bound for the mean of a normally distributed population using the…

A: given data  x¯ = 39316n = 14σ= 3276normal distribution 95% upper confidence bound = ?

Q: Construct a 90% confidence interval for the population mean, μ. Assume the population has a normal…

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Q: In a random sample of six people, the mean driving distance to work was 24.9 miles and the standard…

A: The sample size: n=6 Sample mean: x¯=24.9 miles Standard deviation: s=7.9 Confidence level: C=0.99…

Q: In a random sample of eight ​people, the mean driving distance to work was 19.3 miles and the…

A: The question is about confidence interval Given : Randomly selected no. of people ( n ) = 8 Sample…

Q: The results of an analysis for a certain sample is given: 20.1, 24.1, 23.5, 22.2, and 21.6. Find the…

A:

Q: Allegiant Airlines charges a mean base fare of $84. In addition, the airline charges for making a…

A: Given Information- Mean base fare = $84 Additional charges average = $37 Sample size, n = 80…

Q: In a normally distributed data set with a mean of 22 and a standard deviation of 4.1, what…

A: According to the given information, we know that The distribution is normal. Mean = 22 Standard…

Q: Allegiant Airlines charges a mean base fare of $86. In addition, the airline charges for making a…

A: Total cost = $86 + $36= $122 Hence, μ=122σ=40 a.  The population mean cost per flight is $122…

Q: A set of scores has a mean of 5.8 and a standard deviation of 2.3. Calculate the z scores for the…

A: Given Data: Meanμ=5.8 Standard deviationσ=2.3   To Find: z-score for a) 2.1 b) 5.7 c) 7.3 d) 12.4

Q: Compute for the median, and standard deviation of the given data

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Q: Assume that the time a student stays in school is normally distributed with a mean of 5 hours and a…

A: Given: μ=5 and σ=0.5.   The z-score is calculated asz=x-μσ

Q: llowing three data sets has the largest standard deviation? A (9,10,11,7,13) B(10,10,10,10,10)…

A: The Standard Deviation is given by SD=∑x-x2N Where, x is the mean of data.N is the number of terms.

Q: community college Math instructor feels that the average number of units students enroll in each…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: A sample of 64 was taken from a population, with the mean of the sample being 25 and the standard…

A: It is given that  Sample mean = 25 Sample standard deviation = 2 Sample size = 64 Confidence level =…

Q: The hourly cost to hire a handyman in a particular city is normally distributed with mean $40 and…

A: Solution: 19. Let X be the hourly cost to hire a handyman in a particular city. From the given…

Q: Assume that the heights of men applying for military academy training are normally distributed with…

A:

Q: A study of 64 bolts of carpet showed that their average length was 75 yards. The standard deviation…

A:

Q: In a random sample of 50 adults, the mean body mass index (BMI) was 27.7 and the standard deviation…

A:

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are thez-scores for the…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: The number of incoming students at two campuses of a midwestern university have historically been…

A: Given that the main campus incoming class has a mean of 3,916 and a standard deviation of 375.…

Q: A study of 81 bolts of carpet showed that their average length was 77.5 yards. The standard…

A:

Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

A: GivenMean(x)=77.5sample size(n)=96standard deviation(s)=1.6α=1-0.99=0.01α2=0.005zα2=z0.05=2.58

Q: The speed of greyhounds is normally distributed with a standard deviation of 0.15 mph. How many dogs…

A: Population standard deviation()=0.15Margin of error(E)=0.05

Q: Let the Probability Mass Function as follows: f(-1)=0.2, f(2)3D0.3, f(3)=D0.22 and f(0)=??, Then…

A:

Q: Construct a 95% confidence interval for the population mean, µ. Assume the population has a normal…

A: Here given Sample Size= 16 Sample mean= 645 hrs=X¯ Sample SD= 31 Hrs=s

Q: Five students took a self-confidence test. Their deviation scores were –4, +3, +1, –2, and +2.…

A: Given ,deviation scores were –4, +3, +1, –2, and +2

Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

A:

Q: A company selling a new type of laptop battery advertises that it has a méan lifetime of 5 years. If…

A: Solution:-To make an informed decision about the preferred standard deviation of battery life spans,…

Q: In a population of 100 male fruit flies, the mean abdomen length is 2.0 mm and the standard…

A: Given  μ=2 and σ=0.3 Use standardization as z=x-μσ

Q: The average gold content from an ore sample in 36 different locations is found to be 2.6 grams per…

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Q: Entrance exam scores at Cititon University are normally distributed with a mean of 552 and a…

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Q: Rank the data sets described in order of the least spread out (1) to the most spread out (5) based…

A: