The mean time it takes for workers at a factory to insert a delicate bolt into an engine is 15 minutes. The standard deviation of time to insert the bolt is 4.0 minutes and the distribution of time is approximately normally distributed. For a randomly selected worker, what's the approximate probability the bolt will be inserted in 19 minutes or less? Round to the nearest whole percent.       A) 16%      B) 84%      C) 50%      D) 18%

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A: According to the given information, we have Probability, p = 0.4 Sample size, n = 10

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A: Given,degrees of freedom(df)=11

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A: GivenMean(μ)=58650standard deviation(s)=1890sample size(n)=40

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A:

Q: 4. (Proportion 5%) Supposing that X,,X,.,X,-N,(u,E) as an i.i.d with 2| is given. Determine the…

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Q: In a Statistics class, the final exam scores were normally distributed with a mean of 63 and a…

A: Mean, μ = 63 and standard deviation,σ = 5

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A:

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A:

Q: The standard deviation of a binomial distribution is 4, then the variance of the distribution is а.…

A: We know that, Variance=(standard deviation)2 Here standard deviations =4

Q: Suppose the distribution of the weights of ground beef follows a normal distribution with a mean of…

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Q: In a dependent sample t-test, you calculate the standard deviation for the  a) difference scores b)…

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Q: Blood glucose levels are normally distributed with a mean of 85 mg/dl and a standard deviation of 25…

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A:

Q: 2- Bob takes on average of 50.5 hours uniformly distributed to to finish a portrait in his studio…

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Q: The number of newspapers sold daily at a kiosk is normally distributed with a mean of 350 and a…

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Q: Using the Karl Pearson's measure of Skewness, find the coefficient of skewness for each…

A: Since you have posted multiple sub-parts, we will solve the first three sub-parts for you. To get…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

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Q: In a normal distribution, about what proportion of cases falls within +/- 1 standard deviation from…

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Q: Answer ONLY parts D,E

A: Solution

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Q: refers to the flatness or peakedness of a frequency distribution.

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Q: Consider a population of 800 values that are normally distributed with a mean of 80 and standard…

A: Given information Mean = 80 Standard deviation= 5 Z score = x - mu /s

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.