The shape of the distribution of the time required to get an oil change at a 20-minute oil-change facility is unknown. However, records indicate that the mean time is 21.2 minutes, and the standard deviation is 3.2 minutes. Complete pa (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2).

Q: As the standard deviation of a normal distribution increases, the height of the normal curve

A: Standard deviation is the measure of the amount of dispersion of a set of values.  A low standard…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 400 and a…

A: It is given that the mean is 400 and standard deviation is 50.

Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…

A: Given, Mean, μ = 35.5 Standard deviation, σ = 2.5 We have to find the probability that the rainfall…

Q: The mean of a normal disiribution is 50 and standard deviation is 12.5. Calculate the 60th, 65th and…

A: Given,mean(μ)=50standard deviation(σ)=12.5

Q: In a normal distribution, approximately ___ percent of the distribution falls between three standard…

A:

Q: Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally…

A: It is given that the life expectancy of a certain brand of non-defective light bulbs follows normal…

Q: Assume a normal distribution of mean = 35 and standard deviation of 5. Answer the following…

A: a) μ= 35 σ=5    P ( x  > 38) = 1- p (x ≤ 38)                              = 1 - p[ (x-μ)/σ  ≤…

Q: The chickens at Colonel Thompson's Ranch have a mean weight of 1850 g with a standard deviation of…

A:

Q: A vending machine is designed to dispense a mean of 7.3 oz of coffee into an 8-oz cup. If the…

A: According to question given thatMean (μ)= 7.3 ozCoffe into an 8 oz cupStandard deviation of the…

Q: What is the mean of the distribution? What is the standard deviation of the distribution?

A: Given Mean1=30 Mean2=27 n1=41 n2=57

Q: What would a skewness of .163 mean? Is this normal distribution?

A: Solution:  Skewness: Skewness can be defined as the lack of symmetry in the data set.  In other…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 400 and a…

A:

Q: Click here to view page 1 of the cumulative standardized normal distribution table. Click here to…

A: Let X be the random variable from Normal distribution with mean (μ) = 101, standard deviation (σ) =…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Let X be the mathematics score in SAT exam. Therefore: X~Norm(μ=500, σ=100)

Q: The mean score for a test is 87 with a standard deviation of 12.  Assuming a normal distribution for…

A: Given,mean(μ)=87standard deviation(σ)=12

Q: The finished inside diameter of a piston ring is normally distributed with a mean of 12 centimeters…

A: Let us consider, finished inside diameter of a piston is denoted by X with mean  of 12 and a…

Q: Assume that the speed of automobiles on an expressway during rush hour is normally distributed with…

A: It is known that a normal distribution is symmetrical about the mean

Q: The heights of 500 students are normally distributed with a mean of 175.5 centimeters and a standard…

A: Givenmean(μ)=175.5standard deviation(σ)=6.5n=500

Q: Click here to view page 2 of the standard normal distribution table. student(s) (Round to the…

A: It is given that  Mean, μ = 117 Standard deviation, σ = 14 Sample size, n = 550 Z-Score, Z = ( X - μ…

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: Given,mean(μ)=250standard deviation(σ)=48sample size(n)=500

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Topic- Probability

Q: Find the mean deviation about mean of rectangular distribution,

A:

Q: State the difference between the shape of the t distribution and the normal distribution?

A: Normal distribution is symmetric about mean and bell-shaped.

Q: If a set of observations is normally distributed, what percent of these differ from the mean by (a)…

A:

Q: For a normal distribution, the mean is equal to the median. True False

A: The Normal distribution is Symmetric distribution. So,  Mean = Median = Mode.

Q: A survey is planned to determine the mean annual family medical expenses of employees of a large…

A: Given,population standard deviation(σ)=319margin of error (E)=60α=1-0.90=0.1α2=0.05Z0.05=1.645…

Q: Suppose a geyser has a mean time between eruptions of 60 minutes. If the interval of time between…

A: From the given information, μ=60σ=14 c) n=26

Q: In a normal distribution, 31% of the items are under 45 and 8% are over 64. Find the mean and the…

A: Given Data: Let X represent the variable P(x<45)=0.31 P(x>64)=0.08   X~ Normal μ, σ2   To…

Q: Calculate the correct mean and standard deviation.

A: Here use standard deviation and mean formula

Q: In a normal distribution, approximately what percent of data items fall within 1 standard deviation…

A: Empirical rules:1) P(μ-σ<X<μ+σ)=68%2) P(μ-2σ<X<μ+2σ)=95%3)P(μ-3σ<X<μ+3σ)=99.7%

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 400 and a…

A:

Q: In a normal distribution, what percentage of the population lies with-in 1 standard deviation of the…

A: In a normal distribution, there are predefined percentage of the population which lies in 1 standard…

Q: Government regulations dictate that for any production process involving a certain toxic chemical,…

A:

Q: In a normal distribution, find the proportion of the population within three fifths of a standard…

A: We have to find out given proportion..

Q: In a normal distribution, find the proportion of the population within one quarter of a standard…

A: The proportion of the population within one quarter of a standard deviation of the mean.…

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A:

Q: The reading speed of second grade students in a large city is approximately normal, with a mean of…

A: b)GivenMean(μ)=92standard deviation(σ)=10sample size(n)=11

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: In question, Given that the average amount of caffeine consumed daily by adults is normally…

Q: The annual per capita consumption fresh bananas (in pounds) in the United States can be…

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

Q: Could this curve represent a normal distribution?

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Q: If a normal distribution has a mean of 60 and a standard deviation of 5, complete the normal…

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Q: The mean, median, and mode of a normal distribution are (Choose one) each other. standardized by…

A: For Normal distribution, mean, median and mode are coincide.

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 600 and a…

A:

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: Solution

Q: The mean incubation time for a type of fertilized egg kept at 100.6°F is 23 days. Suppose that the…

A: The mean and standard deviation are 23 and 2, respectively.

Q: A survey is planned to determine the mean annual family medical expenses of employees of a large…

A:

Q: Use the standand normal distribution table to determine the percent of data between z= - 0.92 and z=…

A:

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: The mean exam score for 45 male high school students is 23.5 and the population standard deviation…

A: