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: For a population with u = 34, a score of X = 31 corresponds to z = -1.00. The standard deviation for…

A:

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: 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: 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: A population of scores has μ = 80. In this population, a score of X= 92 corresponds to z = 5. what…

A: Given: μ = 80 z = 5 X= 92

Q: sample has a mean M = 89. In the sample, a score of X = 6 corresponds to z = 2. What is the standard…

A:

Q: (b) A scientific group claims that the true population mean u is more than 7 meters. (i) What is the…

A: Givenclaim is that the true population mean μ is more than  7 metersMean(x)=7.3sample size(n)=16σ=1

Q: The length of adult male dolphins is normally distributed with an unknown mean µ. By some previous…

A: The random sampling distribution of a statistic is approximately normal and the values given in the…

Q: Suppose that the newborn weights are normally distributed with a mean of m kg and a standard…

A: We have given that  Mean(µ) = mStandard deviations (σ) = 0.8

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: 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: a population of scores has u=44. in this population a score of x=40 corresponds to z = -1.00. What…

A: We have given that, Population mean (u) = 44, raw score of population (X) = 40 and z- score = -1. 00…

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: of size 25, determine the mean and standard deviation of x.

A: here given ,  population mean and standard deviation are respectively 78 and 10 inches

Q: The data set of size 40 has mean 15 and standard deviation 2. Approximately how many observations…

A: Given Information Mean (µ) = 15 Standard deviation (σ) = 2 Finding the probability for scores that…

Q: The weights of 1,000 men in a certain town follow a normal distribution with a mean of 150 pounds…

A: Given ,Sample size , n = 1000Mean = 150 Standard deviation , 15We have to find the number of men…