If the number of degrees of freedom for a chi-square distribution is 25, what is the population mean and standard deviation? mean = standard deviation = Round to the nearest tenth.
Q: When IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is…
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Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…
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Q: What distribution is used in this chapter to make inferences for one population standard deviation?
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Q: What is the formula for STANDARD DEVIATION FOR POPULATION?
A: The standard deviation for population is indicated by the symbol (σ)
Q: Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of…
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Q: If the Standard Deviation of a data set is 2.1, what is the variance of that data set? State your…
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Q: Suppose the exam average in a class is 72% with a standard deviation of 3. What proportion of…
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Q: A quantitative data set has mean 30 and standard deviation 4. At least what percentage of the…
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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: if an approxemitly bell shaped distribution has a mean of 30 and standard deviation of 5, what…
A: Given that X~N( μ = 30 , ? = 5 ) μ = 30 , ? = 5 Formula for Z-score Z-score =( x - μ )/?
Q: If the number of degrees of freedom for a chi-square distribution is 21, what is the population mean…
A: Given: Degree of freedom = 21
Q: Assuming that the heights of college women are normally distributed with mean 62 inches and standard…
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Q: If the variance of a distribution is 16, the standard deviation is?
A: Solution: From the given information, the variance of a distribution is 16.
Q: Assuming that the heights of college women are normally distributed with mean 64 inches and standard…
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Q: If a distribution has a mean of 50 and a standard deviation of 5, what value would be -1 standard…
A: Given, μ=50σ=5z=-1x=?
Q: A quantitative data set of size 80 has mean 35 and standard deviation 33. At least how many…
A: It is given that the mean and standard deviation of the quantitate data set are 35 and 33,…
Q: if a distribution is normal with a population mean = 60 and population standard deviation = 15, what…
A: Let "X" be the scores that is normally distributed.
Q: If each score is increased by 25, what will be the mean and standard deviation of the distribution…
A: Given that The distribution of raw scores on particular achievement test Mean = 500 Standard…
Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…
A: Standard normal Distribution : Let x be the continuous random variable and it said to be follows…
Q: In a specific year, SAT scores were Normally distributed with mean 1026 and standard deviation 209;…
A: given Mean=1026 Standard deviations=209
Q: If the number of degrees of freedom for a chi-square distribution is 64, what is the population mean…
A: It is known that population mean of a χ2 distribution is, μχ2= Df And the population standard…
Q: What is the sum of the deviation scores for the data in the frequency distribution table below?
A: Sum of deviation of scores from mean is always zero.
Q: If the weekly standard deviation is 140 units, what is it if the lead time is 3 weeks?
A: The provided information are: Sigma for the interval = 140 units Lead time interval (LTI) = 3 weeks…
Q: The vocabulary test scores for the population of third graders is normally distributed with a mean…
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Q: If the number of degrees of freedom for a chi-square distribution is 28, what is the population mean…
A: It is known that for chi-square distribution: μχ2=degree of freedom So,μχ2=28
Q: If mean of a skewed distribution is 170 and mode is 158 , and standard deviation is 48 find…
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Q: A data set with roughly a bell-shaped distribution has mean 45 and standard deviation 12.…
A: The percentage of the observations lie between 33 and 57 is obtained below:Let X be an observation…
Q: If the coefficient of variation is 1% and the mean is 3.2, determine standard deviation (to four…
A: We have given that Mean(x̅) = 3.2 CV = 0.01
Q: A distribution has standard deviation of 41.9 and mean of 74. What is the coefficient of variation?
A: Given standard deviation=41.9 mean=74
Q: When a distribution is bell-shaped, approximately what percentage of data values fall within 1…
A: We know that, the empirical rule which is also known as 68-95-99.7 rule. The Empirical Rule finds…
Q: The sum of deviation scores in any distribution (population or sample) is always equal to 0.…
A: Let us take an example. Let X be random variable we know that Meanx¯=∑xn Therefore, ∑x=nx¯
Q: The data set has 80 observations and has mean 30 and standard deviation 5. Approximately how many…
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Q: If the standard deviation of all dogs is 54 lbs, what is the standard deviation of the average…
A: Given,σ=54n=110σx=?
Q: If mean is 20 and standard deviation is 5, what value of x contain the lowest 20% of the…
A: Solution
Q: suppose the heights of 18-year-old men are approximately normally distributed, with mean 73 inches…
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Q: If a number is added to a data set which is far away from the arithmetic mean the what happens to…
A: There are two properties regarding the addition of a number to a data set and its effect on standard…
Q: A quantitative data set has mean 15 and standard deviation 2. At least what percentage of the…
A: It is given that the mean is 15 and standard deviation is 2.
Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…
A: Given: Score of student(x)=77Population meanμ=84.5Population standard deviationσ=5.1
Q: Suppose that annual precipitation is normally distributed, with mean 50 inches, and standard…
A: Obtain the 65th percentile of the precipitation distribution. The 65thpercentile of the…
Q: In a normal distribution with a mean of 72 and a standard deviation of 12, what percentage of cases…
A: GivenMean(μ)=72standard deviation(σ)=12
Q: As reported in Runner's World magazine, the times of the finishers in the New York City 10- km run…
A: Percentile : Percentile is the number such that certain percentage of the fall below that values.…
Q: A distribution is known to be bell-shaped, with a mean of 82 and a standard deviation of 6. What…
A: Obtain the Z-score for the random variable X equals 76. The Z-score for the random variable X equals…
Q: If a normal distribution has a mean of 15.15 and standard deviation of 3.33, then what proportion of…
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Q: The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals
A: Givenvariance(σ2)=576
Q: Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of…
A: Here, mean is 82 and standard deviation is 6.
Q: The data set has mean 15 and standard deviation 2. Approximately what percentage of the observations…
A:
Q: The mean for data set is 59, the standard deviation is 4, and the z- score is 0.03, what is the raw…
A: Here given that the mean =59, standard deviation=4, z score=0.04, we need to find the raw score x.
Q: IF THE VARIANCE OF A POPULATION IS 0.75, THE STANDARD DEVIATION MUST BE?
A: It is an important part of statistics . It is widely used .
Q: The ages of the employees at Solar Systems, Inc. is normally distributed with a mean of 32.7 years…
A: Let X=ages of the employees at Solar Systems, Inc. Given that X follows normal distribution with…
Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…
A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…
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