In a certain distribution the following results were obtained. X = 45, Median = 48, Coeff. Of Sk=0.4. %3D The person who gave you the data failed to give the value of standard deviation and you are required to estimate it with the help of the available information.

Q: A random sample of 80 tires showed that the mean mileage per tire was 41,700 mi, with a standard…

A: (a) A random sample of 80 tires showed that the mean mileage per tire was 41700 mi, with a standard…

Q: A given distribution has a population mean, μ, of 134 and a population standard deviation, σ, of 7.…

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Q: A set of data items is normally distributed with a mean of 500. Find the data item in this…

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Q: the average height of grade 10 students is 148 cm. a sample of 250 students had an average heigh of…

A: Given: μ=148Sample size, n=250sample mean, x¯=148.3sample sd, s=8

Q: In a recent year, the ACT scores for high school students with a 3.50 to 4.00 grade point average…

A: The mean is 25.7 and the standard deviation is 3.3.

Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

A: Given serum HDL levels in patients are normally distributedmean = 62standard deviation = 3.6The Z…

Q: For a sample of 18 cars, you find the standard deviation of the price is 6150 (measured in dollars).…

A: Given that, Sample size of cars n=18 Standard deviation of the price s=6150

Q: A given distribution has a population mean, μ, of 116 and a population standard deviation, σ, of 8.…

A: From the provided information,

Q: On a recent quiz, the class mean was 76 with a stanbard deviation of 3.1. Calculate the z score (to…

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Q: At my work there is a fancy coffee machine that dispenses 120 ml of coffee, but I believe that the…

A: Given data and calculation for sample standard deviation is shown below Hypothesized mean = 120 ml…

Q: The members of Maggie's choir have a mean height of 58 inches, with a standard deviation of 4…

A: given: Mean height of 58 inches, Standard deviation of 4 inches  find at least approximately 89% of…

Q: A random sample of 70 tires showed that the mean mileage per tire was 41,200 mi, with a standard…

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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days…

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Q: A given distribution has a population mean, μ, of 150 and a population standard deviation, σ, of 6.…

A: Distributions are of 2 types, discrete and continuous. A normal distribution is a continuous…

Q: A simple random sample of 40 items resulted in a sample mean of 25. The populationstandard deviation…

A: It is given that, Sample mean = 25. Population standard deviation, σ is 5. The sample size, n is 40.…

Q: For a t distribution with 15 degrees of freedom, 90% of the distribution is within how many standard…

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Q: A given distribution has a population mean, μ, of 117 and a population standard deviation, σ, of 6.…

A: Given data, Mean (μ)=117 sd(σ)=6 If x=172 z=?

Q: The monthly income from a particular occupation is normally distributed, with a mean of 3800 dollars…

A: Given,mean(μ)=3800standard deviation(σ)=500

Q: The heights of 1000 students are normally distributed with a mean of 170.5 centimeters and a…

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Q: In the past Algebra classes, records show that the average score of the students in the mid-term…

A: As per our guidelines we can solve first three subpart and rest can be reposted. Solution-: Let, X=…

Q: A major credit card company has determined that the amount its customers charge on their accounts is…

A: Given that, Mean = 2800 Standard deviation = 200 Number of customers = 20000

Q: A store sells meat in smallmedium and large size packages. The small packages have a mean weight of…

A: Here given that, Mean, mu= 1 And standard deviation, sigma= 0.1 Z score is given by, Z score=…

Q: The widths of platinum samples manufactured at a factory are normally distributed, with a mean of…

A: Solution Given: Formula: Let "x" be the widths of platinum samples manufactured at a factory in…

Q: Hello, how do you calculate this? Thank You!

A: Compute the 90% confidence interval for the population mean.Since the sample size is small and the…

Q: A given distribution has a population mean, μ, of 147 and a population standard deviation, σ, of 7.…

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Q: A given distribution has a population mean, µ, of 106 and a population standard deviation, ơ, of 15.…

A: It is given that Mean = 106, SD = 15 And value x = 134

Q: Given that it is normally distributed with a standard deviation of 8.025 cm. The engineer rejected…

A: we have to find mean value for given data...

Q: A group of students take a exam and the adverage was m = 90 and the standard deviation was 7.8.…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: The heights of tomato plants are Normally distributed with a mean of 3.56 feet and a standard…

A: It is given that μ=3.56 and σ=0.25   Use standardization asz=x-μσ

Q: The average grade for an exam is 74, and the standard deviation is 7. If 12% of the class is given…

A: Let the random variable X denote grade score. Then, X~Nμ, σ2 with μ=74 and σ=7. Let α be the lowest…

Q: E (T; – T)² = 2535. in

A: Here's the explanation :- The standard deviation is a measure of the amount of variation or…

Q: For a population with  = 150, a raw score of X = 125 corresponds to z = -2.00.  What is the standard…

A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

Q: In​ 2007, the mean rate of violent crime​ (per 100,000​ people) for 10 regions in the northeast of a…

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Q: Q.3 Assume that the heights of men are normally distributed with a standard deviation of 2.5 inches.…

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Q: the golf scores for a school team were normally with a mean of 68 and a standard deviation of 3. Use…

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Q: Suppose the weekly rent of international students in Sydney is normally distributed with a mean of…

A: Assume,  X be the random variable which represents the amount of weekly rent in dollars. μ be the…

Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

A:

Q: The widths of platinum samples manufactured at a factory are normally distributed, with a mean of…

A: Obtain the standard z-score for the random variable X equals 1.8 cm. The standard z-score for the…

Q: As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a…

A: A continuous random variable X follows Normal distribution with parameters μ and σ2 if its…

Q: In the past Algebra classes, records show that the average score of the students in mid-term exam…

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Q: The revenue of a  shop is approximately normally distributed with a mean of $4500 and a standard…

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Q: Returning to the sample of adult women, with a sample mean height of x¯=64.3 inches and sample…

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Q: A major credit card company has determined that the amount its customers charge on their accounts is…

A: (15) Obtain the proportion of customers charge more than R2750 per month on their account. The…

Q: A sample of n = 25 scores has a mean of M = 83 and a standard deviation of s = 15.   Explain what is…

A: In this case, the sample size is n = 25, the sample mean is M = 83 and the sample standard deviation…

Q: On an exam with u = 52, you have a score of X = 56. Which value for the standard deviation would…

A: We have given that µ = 52 x = 56 z-score formula is given as  z =( x - μ )/σ

Q: An instructor gives his class an achievement test which, as he knows from years of experience,…

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Q: Here * denotes the lost values. If it was known that the mean of the marks was 56 and the standard…

A: The combined mean is given by

Q: The monthly income from a particular occupation is normally distributed, with a mean of 5000 dollars…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Q2) A certain machine makes electrical resistors having a mean resistance of 60 ohms and a standard…

A: Given information: μ=60, σ=2

Q: On an exam with a standard deviation of σ = 6, Tom’s score of X = 54 corresponds to a z-score of z =…

A: