The mean number of travel days per year for salespeople employed by three hardware distributors needs to be estimated with a 0.90 degree of confidence. For a small pilot study, the mean was 150 days and the standard deviation was 14 days. If the population mean is estimated within two days, how many salespeople should be sampled? Select one: a.2100 b.511 C.452 d.142 e.134

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Q: For this set of data, the standard deviation (s) is equal to: 9, 8, 10, 5, 5, 2, 3, 6, 3

A: Mean:The formula for finding mean is shown below:

Q: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, The points of final exam follows normal distribution with mean 73 and standard deviation 8.…

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

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Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given data, Mean = 69 SD = 7

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A: given data standard deviation s = 4 sample size n = 64

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Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given μ= Mean =71 σ= standard deviation =8  Top​ 10% receive​ A's  Next​ 20% received​ B's Middle​…

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Q: Given that the mean of a set of data is 40 and the standard deviation is 2, what is the coefficient…

A: Given,standard deviation(σ)=2mean(μ)=40

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A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

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Q: Find the lowest score on the final exam that would qualify a student for an​ A, a​ B, a​ C, and a D

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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: In a large section of a statistics class, the points for the final exam are normally distributed,…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

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A: Class(1) Frequency (f)(2) Mid value (x)(3) f⋅x(4)=(2)×(3) cf(6) 0-10 4 5 20 4 10-20 23 15 345 27…

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

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A: Given that the mean value is 76 and the standard deviation is 7. Grades are assigned such that the…

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A: According to the given information, we have Standard deviation = $275 Margin of error = $100…

Q: a.   The average age of 12 jurors on a jury is 50 years.     b.   The standard deviation of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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Q: If the number of degrees of freedom for a chi-square distribution is 32, what is the population mean…

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

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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: Given that the mean of a set of data is 25 and the standard deviation is 3, what is the coefficient…

A: Given: Mean = 25 Standard deviation = 3

Q: The following percentages of chloride were found: 32.52%, 32.14%, 32.61%, and 32.75%. Find the mean,…

A: The following percentages of chloride were found: 32.52%, 32.14%, 32.61%, and 32.75%  We can rewrite…

Q: The average speed of 64 random cars traveling on a certain highway was 80 km/h and the sample…

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A: The frequency distribution for heights of tomato plants is given below : For computing the…

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Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8