4.15. If the local restaurants in a small town record an average of 92 customers a day, with a standard deviation of 11, how many customers does a restaurant need to serve to be in the top 25%?

Q: Suppose that a company makes light bulbs with a mean life of 310 hours, and a standard deviation of…

A: Given,  Mean μ = 310 Standard deviation σ = 47 Let x be hours a light bulb last

Q: A population data set has a mean of 81 and a standard deviation of 5.2. Find the z-scores for each…

A: Population mean, μ=81 population standard deviation, σ=5.2 The formula of z-score is, z=x-μσ…

Q: Suppose for a given month, the mean daily closing price for stock A was 107.66 and the standard…

A: Given For A) Mean=107.66 Standard deviations=10.7 For B) Mean=74.11 Standard deviations=7.6

Q: Consider a data set that has a mean of 17 and a standard deviation of 5.7. According to Chebyshev's…

A: Chebyshev's Theorem: Let X be an integrable random variable with finite expected value μ and finite…

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

A: Let us consider the Population is denoted by X which is known to be normally distributed with a mean…

Q: Suppose that weights of 3200 registered female great Danes in the United States are distributed…

A: Using normalised probability and z table

Q: 3. In regard to the standard deviation you calculated on #2, what is one conclusion you can make…

A: You have asked only question 3. So, the answer is given for question 3 below in the next step.

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

A: Given information Mean = 116 Standard deviation = 14  between 88 and 116

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

A: Given dataMean = 116Standard deviation = 14Probability that population would be between 88 and 102…

Q: Suppose you found that the average sea- faring bird can fly 8,000 km without stopping. The wandering…

A:

Q: In a group of 10 workers, the wage of the lowest paid worker is $ 225 less than the average wage of…

A: Given : N=10 Lowest paid worker = 225 We have to tell standard deviation of wages = 7.53

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

A: We have, Mean μ=116 Standard deviation σ=14 X~N116,14 Now,…

Q: 7. If you made only n = 1 measurement of rack height, the standard deviation of the measurement…

A: Solution: 7. From the given information, n = 1.

Q: 8, and the sample standard deviation, s, is found to be 4.6. ...

A:

Q: Suppose that in a given semester, the MEAN of units taken by students at Delta is 17 and has a…

A:

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

A: Obtain the standard z-score for X equals 88. The standard z-score for X equals 88 is obtained below:…

Q: A company pays its employees an average wage of $22.50 an hour with a standard deviation of $2.30.…

A: The z score is used to test the probability of normal distribution. It is also known as standard…

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

A: The percentage of the population would be between 116 and 144 is obtained below:It is given that the…

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

A: Given information Mean = 144 Standard deviation = 27  between 90 and 171

Q: 4. In studying ocean conditions, the Bureau of Fisheries found that for one location, the August…

A: Given ,Mean μ = 83.6Standard deviation σ=24Let  x be temperature normally distributed

Q: The daily dinner bills in a local restaurant are normally distributed with a mean of $28 and a…

A: Given : Mean , μ = $28  Standard deviation , σ = $6 c. What are the minimum and maximum of the…

Q: 2. Suppose that in an examination, the cut-off score for passing is 75 for 200 persons. If the mean…

A: Given that, Suppose that in an examination, the cut-off score for passing is 75 for 200 persons. If…

Q: A set of data is found to have a sample standard deviation of 25. Suppose 9 were added to each of…

A: Given: s=25 9 is added to each of the values.

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

A: Let X denote the distribution of population. Given that X ~ N(mean = 116, SD = 14) Then Z = (X -…

Q: 7. The height of rugby players is normally distributed with a mean of 1.86 m and a standard…

A: Given: Population mean μ=1.86 Population standard deviation σ=0.08 Middle 80% so, α=1-0.80=0.20

Q: 8. Suppose that monthly cell phone bills are normally distributed with a mean of $96.20 and a…

A: Given Information: Population mean (u) = 96.20  Standard deviation (s) = 12.64 Target value (x) =…

Q: A study at the University of Colorado at Boulder shows that running increases the percent resting…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

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

A: The provided information are:

Q: (c) If the standard deviation remains at 0.5 ounce, what must the mean weight be for the company to…

A: Givenstandard deviation(σ)=0.5x=13 ounces

Q: 6.21. For two observations 'a' and 'b', show that standard deviation is half the disto between them.

A:

Q: A value of 104.2 would be how many standard deviations above the mean, given a mean of 100, and a…

A: Solution: From the given information, µ=100 and a standard deviation σ=5.6.

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: Given Information: μ=20 and σ=3.2 (b) To estimate the percentage of showers that used more than 26.4…

Q: 7. Suppose the length of newborn babies in a community is normally distributed with an average of 50…

A: We have given that  Mean=mu=50 Standard deviation=sigma=3 X~Normal(mu=50,sigma=3)

Q: 2. If the heights of a male youngsters are normally distributed with a mean of 60 inches and a…

A:

Q: 2. A researcher wishes to estimate within P20 the average cost of postage a community college spends…

A:

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 16.4 and…

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

A: From the information, the mean is 116 and a standard deviation is 14.

Q: - If a population with µ =72 and o = 8, the distribution of z-scores will have a mean and standard…

A: Given: Mean = µ = 72 Standard deviation = σ = 8

Q: A scientist found that the lengths of a certain population of snakes can be reasonably described…

A: The normal distribution  in the center is generally denser and basically less dense at tails. There…

Q: Suppose Stock A has had a mean price of $6.58 per share with a standard deviation of $1.88, and…

A: GivenFor stock A:-Mean(μ)=6.58standard deviation(σ)=1.88For Stock B:-Mean(μ)=10.57standard…

Q: Suppose that the lengths of pregnancies are normally distributed with a mean of 270 days and a…

A:

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

A: Answer - A Normal distribution with a mean μ = 116  and a standard deviation σ = 14…

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

A: Given information- Population mean, μ = 116 Population standard deviation, σ = 14 So, the percent of…

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

A: From the provided information,

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Suppose that the heights of adult men in the United States are normally distributed with a mean of…

A:

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

A: Given data A population is normally distributed with mean equal to 144 and standard deviation equal…

Q: (c) If the storeroom has 30 reams at the start of the day, how many should the manager expect to…

A: Given: X 0 1 2 3 4 5 P(X=x) 0.05 0.15 0.25 0.4 0.05 0.1

Q: 2. Imagine the daily high temperature in Toronto was recorded every day for 14 days in January, and…

A: As we are authorized to answer only question with maximum 3 subparts for each question and that you…

Q: Suppose that the amount of time that takes place for the Bureau of Internal Revenue to send refunds…

A: Solution: 4. Let X be the amount of time. From the given information, X follows normal distribution…