The graph shows the distribution of the number of text What percentage of young adults send between 128 messages young adults send per day. The distribution is approximately Normal, with a mean of 128 messages and a standard deviation of 30 messages. and 158 text messages per day? О 34% 50% Daily Text Messaging 66% 68% 38 68 98 128 158 188 218 248 CO

Q: For the given speed information in the table below, find the standard deviation and the ?85th…

A: Speed Frequency x d=x-49.9 f.d f.d2 36-39.9 3 37.9 -12 -36 432 40-43.9 7 41.9 -8 -56 448…

Q: Breathing rates for humans can be as low as 4 breaths per minute or as high as 70 or 75 for a person…

A: (a)   Obtain the fraction of all students would have breathing rates in the interval 12.9 to 15.1…

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A: If we look at both the graphs provided (at 220 C and 250 C ) , the curves are skewed but the data is…

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A: Given that  The graph illustrates the normal distribution with Mean (μ) = $1800 Standard deviation…

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A: The slope of the regression line is given by β=rσweightσage=0.86×3.106.18=0.4314 Now the intercept…

Q: Suppose the people living in a city have a mean score of 40 and a standard deviation of 7 on a…

A: As per guidelines, we will only solve first three subparts, please repost other questions for more…

Q: Gracia, an ALS student, obtained a z-score of 1.35 in an achievement test that is normally…

A: Given : Z-score=1.35 Mean=85 Standard deviation =5

Q: Find the standard deviation and coefficient of variation from the following data: Marks No. of…

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Q: Use the following information to answer the question. The mean age of lead actresses from the top…

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Q: The graph illustrates a normal distribution for the prices paid for a particular model of HD…

A: We have given that  X~N(mu,sigma ^2) mu=1800,sigma =85 Z-socre =(x-mu)/sigma

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…

A:

Q: The time (X) to complete a standardized exam is approximately normal with a mean of 70 minutes and…

A:

Q: In the first quarter of 2019, the average home loan for first time buyers was R950, 000. Assuming a…

A: Here, µ = 950,000 and σ = 70,000.

Q: The length of pregnancies are normally distributed with a mean of 266 days and a standard deviation…

A: Assume a random variable X, that defines the length of pregnancies.

Q: The line plot shows the surface area, in square feet, of the nine desks sold by Matt's Furniture…

A: Modulus of any number is always positive. i. e., |-a| = a     where, a = all real numbers.

Q: Breathing rates for humans can be as low as 4 breaths per minute or as high as 70 or 75 for a person…

A: (a) Obtain the fraction of all students would have breathing rates in the interval from 9.7 to 14.3…

Q: In a recent study, the serum cholesterol levels in men were found to be normally distributed with a…

A:

Q: The graph shows the distribution of the number of text messages young adults send per day. The…

A: Given,mean(μ)=128standard deviation(σ)=30

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…

A:

Q: Assume that the red blood cell counts of women are normally distributed with a mean of 4.577 million…

A: Let x be the red blood cell counts of women which follows normal distribution with mean 4.577…

Q: On a dry surface, the braking distance of a fully loaded tractor trailer is 370 ft with a standard…

A: We have given that.   X~N( μ , ?^2 )   μ=370 , ? =40   Z-score =( x - μ )/?

Q: Suppose that in College Entrance Test, the cutoff score for passing is 85. If the mean of the test…

A:

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Q: Assume that the American worker spends an average of 77 hours logged on to the Internet while at…

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Q: A survey of a number of the leading brands of cereal shows that the mean content potassium per…

A: Here we shall solve using Chebyshev’s theorem. Chebyshev's Theorem estimates the minimum proportion…

Q: Determine the difference X - Y for each matched-pair, then compute the mean and standard deviation…

A: X: 25,26,16,21,15Y: 28,31,30,22,29

Q: The IQs of applicants to a certain college are approximately normally distributed with a mean of 112…

A:

Q: the number of cookies in a shipment of bags are normally distributed with a mean of 64 and a…

A: Given that.   X~N( μ , ?^2 )   μ=64     , ?=4   Z-score =( x - μ )/?

Q: Find the proportion of their long distance calls that is between 4.0  minutes and 5.5 minutes?

A: Let X be a random variable which denotes lengths of the long distance calls.…

Q: The scores on a mathematics exam have a mean of 73 and a standard deviation of 9. Find the x-value…

A: We have given that  X~N(mu,sigma^2) mu=73  , sigma = 9  ,Z-socre =5.019 Z-socre =(x-mu)/sigma

Q: Assume that the red blood cell counts of women are normally distributed with a mean of 4.577 million…

A: We have to find correct option..

Q: Jay is a photographer who estimates that their time shooting for a cooking magazine is uniformly…

A: From the given information, Jay is a photographer who estimates that their time shooting for a…

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A:

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: Assume a mean of 105 papers and a standard deviation of 15 papers. Pays 40¢ for each paper, paper…

A: Given information: μ=105σ=15Cost price for paper=40 centsSelling price for paper=90 cents

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: From the provided information, Mean (µ) = 144 Standard deviation (σ) = 27 X~N (144, 27)

Q: 11 12 13 U2:24:46 The graph shows the distribution of the lengths (in What percentage of videos on…

A:

Q: Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1. If…

A: The z- values tell that the number of standard deviation by which the value of a raw score is above…

Q: In a mango farm of 250 trees, the mean harvest is 96.5 kilos of fruit per tree with a standard…

A: Mean Harvest = μ =  96.5 kilos standard deviation, σ = 8.4 We have to calculate :  P⁡(X<100)  :…

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…

A:

Q: The time that a customer takes to complete a transaction in the business line at the bank follows a…

A: Given Data Population Mean,μ = 5.4 Population Standard Deviation,σ = 1.7

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A: Given X is normal Distributed with mean µ = 0.45 and standard deviation σ = 0.05 now will using…

Q: The mean height of 790 students in a school is 151 cm and the standard deviation is 15 cm. Assume…

A: Given dataμ=151σ=1n=790P(119.5<X<155.5)=

Q: Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If…

A: It is an important part of statistics. It is widely used.

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A: X: the line width for semiconductor manufacturing. X has normal distribution X~N(μ,σ) μ=0.45…

Q: One thousand students took a test resulting in a normal distribution of the scores with a mean of 80…

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

Q: The IQs of applicants to a certain college are approximately normally distributed with a mean of 112…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The table on the right gives the annual income for eight families, in thousands of dollars. Find the…

A: given that  n=8

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

A: Given: μ=116σ=14x=102,144 The formula of z-score is:z=x-μσ First we calculate the z-score for x=102.…

Q: The graph shows the distribution of the lengths (in seconds) of videos on a popular video-streaming…

A: