From past experience it is known that the weights of salmon grown at a commercial hatchery are normal with a mean that varies from season to season but with a standard deviation that remains fixed at 0.3 pounds. If we want to be 95 percent certain that our estimate of the present season's mean weight of a salmon is correct to within ±0.1 pounds, how large a sample is needed?

Q: Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow…

A: We have to find given probability.

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,The population mean (µ) = 116The population standard deviation (σ) =…

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 102 and 130

Q: Suppose a small paint manufacturing company has a daily production that is normally distributed with…

A: Solution: It is given that a small paint manufacturing company has a daily production that is…

Q: For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score…

A:

Q: Using z scores, a population with u = 37 and o = 6 is standardized so that the new mean is u = 50…

A:

Q: concentration (µg/mL) of a specific dose of ampicillin in the urine after various periods of time.…

A: In question, Given that we want to estimate the concentration (µg/mL) of a specific dose of…

Q: A normal population has a mean μ = 34 and standard deviation σ = 10. What proportion of the…

A: normal distribution μ = 34σ = 10 P(x<51) = ?

Q: we are going to practice finding Z and T values for sets of data. We have two scenarios to look at:…

A: For Scenario 1:Since the standard deviation of the population is known (7.5), we will choose to…

Q: In a population with mean 50 what standard deviation score would have a score of X=45

A:

Q: f X is normally distributed with a mean of 42 and a standard deviation of 4, determine the interval…

A: given data, normal distribution,μ=42σ=4CI=0.95α=1-0.95=0.05

Q: For a population with a standard deviation of 20, what is the zscore corresponding to a score that…

A: The population standard deviation is 20. The z-score corresponding to a score that is 5 points below…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: For a population with a standard deviation of  sigma =12, a score of x=44 corresponds to z= -0.5.50.…

A: It is given that sigma is 12 and score, x is 44. Assuming that the z-score is –0.550. (Since it is…

Q: population of N = 10 scores has a mean of µ = 6. After one score is removed, the mean is found to be…

A: given data  population size (N) = 10 population mean ( μ) = 6 after removing one score : new mean =…

Q: ssume that stress level scores are normally distributed with a population mean of 25 and a…

A: Given data, Mean=25 sd =2.5 If n=9 P(23<X<26)=?

Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

A: Given that.   X~N( μ , ?^2 )   μ=71   , ?=?  , X=35 , z=-0.60   Z-score =( x - μ )/?

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: X follows a Normal distribution with mean = 35 and S.D = 7.5 Then z=(x-mean)/SD = (x-35)/7.5…

Q: A sample data has mean x ̅ = 75 and standard deviation s = 10: i. What percent of the data that is…

A: Given:Sample mean x ̅ = 75 and Standard deviation s = 10We have to find P(X > 95 ) = …?

Q: If the mean of x bar is equal to 15.3 and the standard deviation of x bar is 1.20, what is the…

A:

Q: Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow…

A: Given that.   X~N( μ , ?^2 )   μ=89    , ?=3   Z-score =( x - μ )/?

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: From the given information, normal distribution with population mean as 35 and standard deviation as…

Q: For a sample with a standard deviation of s=4, a score of X=35 corresponds to Z= -1.25. what is the…

A: Given,standard deviation(s)=4a score(X)=35Z-score=-1.25

Q: a population with a mean of u=45, a score of X=54 corresponds to z=1.50. What is the population…

A: Given data,Mean μ=45X=54z=1.50Sd σ=?

Q: A population of N=5 scores has a mean of μ=8. After one score is removed, the mean is found to be…

A: We have to find given missing score.