A scientist found that the lengths of a certain population of snakes can be reasonably described using a normal distribution with a mean of 42 cm a standard deviation of 2 cm. If the scientist collected a sample of 89 snakes, how many of the snakes would be expected to have a length less tha 40 cm? 14 30 C 60

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Q: What z-score would be associated with the value x = 124?

A: Given that Mean = 133 SD = 6 And the value is X = 124

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: Here, µ=261 and σ = 17.

Q: A statistics teacher believes that the final exam grades for her business statistics class have a…

A: Given Normal distribution with  Mean =82   SD =8 We have to answer for mentioned questions

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

A: Given data,μ=144σ=27P(90<144)=?

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Q: 1. Suppose that the mean of A is 360 and the standard deviation of A is 40. The mean of B is 45 and…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

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A: Given  X~N(mu=76, sigma^2=10^2) Note: According to Bartleby an expert can solve only one question…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days…

A: Givenmean(μ)=268standard deviation(σ)=13

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A:

Q: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

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: A given distribution has a population mean, μ, of 114 and a population standard deviation, σ, of 12.…

A:

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Q: Suppose that the average amount of ice cream that children eat at birthday parties is 3.6 oz, with a…

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

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days…

A:

Q: Given the mean of a normally distributed data set is 25, with  standard deviation of 5, what percent…

A: We will standardize the normal variable and then use standard Normal table to find the required.

Q: A college professor noted that the grades of his students in an introductory statistics class were…

A: Given,mean(μ)=28.50standard deviation(σ)=9

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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: For a certain species of snake, the mean length of an adult is 63.4 cm with a standard deviation of…

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

A: Given Information Mean µ = 260 Standard deviation(σ) = 14

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A: Given,mean(μ)=28standard deviation(σ)=6sample size(n)=500

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A: In question, The distribution of annual income of middle management employees approximated normal…

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: The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A: The mean is 263 and the standard deviation is 14 days.

Q: If the mean score on a math quiz is 12.6 and 38.2​% of the students in your class scored between…

A: Mean = 12.6 area between 11.1 and 14.1 is 38.2%

Q: A population has a mean of μ and a standard deviation of  . a. If 3 points were added to every…

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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: The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days…

A: Given- μ=269σ=15X~N(269,15)n=56

Q: According to a Human Resources report, a worker in the industrial countries spends on average 419…

A: Solution

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: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

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Q: A population has a mean of u=50 and a standard deviation of 0=10. If 3 points were added to every…

A: The properties of mean are:E(X + a) = E( X ) + a * E(X+a)=E(X)+aE(aX)=aE(X)The property of variance…

Q: A given distribution has a population mean, μ, of 142 and a population standard deviation, σ, of 12.…

A:

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

A: Given: Average=74 Standard deviation=7 z value for 88th percentile z=1.18(consulting the table…

Q: Assume that the heights of adult puffins are normally distributed, with a mean of μ=μ= 15.9 inches…

A: Given data, μ= 15.9  σ= 2.7  n=28 mean of the distribution of x¯  =?

Q: In a normal distribution, it is known that 27.34% of all the items are included from 100 up to the…

A: X~N(μ,σ2)Then,Z=X-μσ~N(0,1)Given, P[100<X<μ]=0.2734and,…

Q: The mean weight of 1000 students at a certain high school is 140 pounds and the standard deviation…

A: Assuming that the weights are normally distributed.