A population of values has an unknown distribution with μ = 248.7 and σ = 21. You intend to draw a random sample of size n = 173. What is the mean of the distribution of sample means? (Please enter an exact answer.) flz = What is the standard deviation of the distribution of sample means? (Please report your answer accurate to 2 decimal places.)

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Solution: Let X be the length of the steel rod. From the given information, X follows normal…

Q: the mean is 146, and standard deviation is 35. A score of 251 is how many z-scores above the mean?

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Q: A population has a mean = 73 and a standard deviation σ = 7. Find the mean and standard deviation of…

A: The mean of the sampling distribution of sample means is 73, or μx​=73. The standard deviation of…

Q: A population has a mean μ = 88 and a standard deviation a=7. Find the mean and standard deviation of…

A: The mean is 88 and the standard deviation is 7.

Q: Calculate the sample standard deviation for this data set: 88, 73, 91.

A: From the provided information, 88, 73, 91 The sample mean of the data can be obtained as:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Let X be IQ score  from normal distribution with mean (μ) = 100 and standard deviation (σ) = 15

Q: The standard error of the mean is the standard deviation of a theoretical sampling distribution. the…

A: We know that- Standard error of the mean is given by- SE=σn

Q: 1) Z-SCORE. Which has a better relative position: a score of 75 on a statistics test with a mean of…

A: HI, we are supposed to answer one question at a time. Since you have not mentioned which question to…

Q: Human body temperature have a mean of 98.20F and a standard deviation of 0.62F. Sally's temperature…

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Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…

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Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: Find the standard deviation if the mean = 2, mode = 5, variance = 56 . Round your answer to three…

A: We have given that,  Mean (x̄) = 2 , mode (z) = 5 and variance        (s^2) = 56 Then,  We will find…

Q: Ngan scored 1 standard deviation below the class average on a statistics exam. The class average was…

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Q: mar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the test…

A: given data, μ=54.5σ=3.1Omar scores exactly 0.75 standard deviations above the mean z=0.75raw score…

Q: Omar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the…

A:

Q: ind the range, the standard deviation, and the variance for the given samples. Round noninteger…

A: The given sample observations are:74, 70, 79, 81, 89, 72, 66, 78, 77, 73, 95 The objective is to…

Q: A population has a mean u 90 and a standard deviation a 18. Find the mean and standard deviation of…

A: The mean is 90 and the standard deviation is 18.

Q: onsider this data set { 9, 3, 8, 8, 9, 8, 9, 18}. Find the standard deviation, s. Round off your…

A: given data, 9,3,8,8,9,8,9,18we have to find out the standard deviation(s) for the given data. x…

Q: Assume that Math test scores are normally distributed with a mean of 200 and a standard deviation of…

A: The provided information is  The mean and standard deviation is  µ=200 σ=40 P(X<120)=?…

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: Given: Population mean (µ) = 100 Population standard deviation (σ) = 15

Q: Gender Hours of sleep E female 8. female female 6. female 6. female female female 6. female 8.…

A: We have given the data of Gender and hours of sleep. We have to find the mean and standard…

Q: To qualify for a medical study, an applicant must have a systolic blood pressure in the 50% of the…

A: Given data ,μ=120σ=3z-value at 50% confidence isz∝12=0.674

Q: Jennifer needs to estimate the average age of vets in Houston. The standard deviation of ages is 17…

A: Given : Standard deviation (σ) = 17 Standard error (SE) = 0.3

Q: In a population distribution, a score of X= 57 corresponds to z= -0.25 and a score of X= 87…

A: From the given information, The distance between 57 and 87 is 30 units. (=87–57) The distance…

Q: Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The…

A: The standard deviation of students lab measurements is 8. Juan repeats the measurement 2 times. That…

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

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Q: Explain the statistics measure standard deviation. Provide the formulas used to calculate the…

A: We want to define standard deviations and difference between population standard deviations and…

Q: The standard deviation of SAT scores is 100 points. A researcher decides to take a sample of 500…

A: Given that SD = 100 Sample size n = 500

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Let X: the length of trout caught in Pyramid LakeGiven that,Mean length(μ) = 19 inches.Sample…

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A: