If standard deviation of population 1 is 3 with sample size is 8 and population 2 standard deviation is 5 with sample size is 7 then standard deviation of sampling distribution is
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A: mean=μ=300, σ=sd=50X~N(300, 50)P(X<250or X>350)=?
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A: Solution The most common measure of how much sample means differ from each other is the standard…
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A: Givensample size(n)=30sample mean of these differences = 2.0sample standard deviation of differences…
Q: I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score.…
A: The test is about the mean Exam 3 score in this course was different than the mean Exam 2 score.
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A: Given, A professor has a sample of 30 student scores with a mean of 10, a variance of 9, and a…
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A: Here's, sample size is given 30 and population standard deviation is known.
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Q: I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score.…
A: Given, The sample mean of the differences = 2.0
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A: The standard error of the sample mean is given as follows SEM = σn
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A: It is given that the sample 1,1,1,2,3,3,3
Q: How do you conduct a test for a hypothesis that two independent population means with known…
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- If normal random variable from a normally distributed population with mean 21 and standard deviation 2, is 21. The value of standard normal random variable will be _A is a characteristic used in ANOVA that allows us to distinguish different populations from one another. standard deviation treatment residual control chartLengths of pregnancies of women are normally distributed with a mean of 266 days and a standard deviation of 16 days. What percentage to the nearest hundredth of children are born from pregnancies lasting more than 274 days? What percentage to the nearest hundredth of children are born from pregnancies lasting less than 246 days?
- What is the standard deviation of abinomial distribution with 50 trialsand p = 0.4?Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.12 and a standard deviation of 1.53 Using the empirical rule, what percentage of American women have shoe sizes that are less than 9.65? Please do not round your answer.I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score. To conduct this test I used the 30 students in my course last semester as my sample. I first calculated the difference in scores between Exam 2 and Exam 3 ("Exam 2 score - Exam 3 score"). The sample mean of these differences is 2.0 and the sample standard deviation of the differences is 3.0. What is your decision for this test? Group of answer choices 1. Reject the null hypothesis 2. Retain the null hypothesis
- The retirement age of National Football League (NFL) players is Normally distributed with a mean of 33 years and a standard deviation of 2 years. What percentage of NFL players retire before age 32? The distribution of average hours of sleep per weeknight among college students is found to be Normally distributed, with a mean of 6.5 hours and a standard deviation of 0.7 hour(s). What percentage of college students sleep between 5.8 and 7.7 on average?A researcher wants to estimate the difference between the mean score points of home and visitor teams in a basketball game. For this purpose, researcher randomly selects 24 basketball games and obtains their scores. In these games, home teams' mean score is 80 points with a standard deviation of 35 points while visitor teams' mean score is 79 points with a standard deviation of 10 points. Assuming equal population variances, find the (93)% confidence interval for the difference between the mean score points of home and visitor teams.What is Pooled Variance Estimate?
- The gestation period of humans follows a normal distribution with a mean of 266 days and standard deviation of 16 days. If random samples of 15 pregnancies are studied, what is the mean and standard error of th sampling distribution of the sample mean? mean of the sampling distribution [ Choose ] standard error of the sampling distribution [ Choose ]The Census Bureau reports that 82% of Americans over the age of 25 are high school graduates. A survey of randomly selected residents of certain county included 1100 who were over the age of 25, and 871 of them were high school graduates, (a) Find the mean and standard deviation for the number of high school graduates in groups of 1100 Americans over the age of 25. Mean = %3D Standard deviation = (b) Is that county result of 871 unusually high, or low, or neither? (Enter HIGH or LOW or NEITHER) Give your answers exactly, or to at least 4 decimal places.according to the bureau of labor statistics the average number of weeks an individuals is unemployes is 27 weeks with a standard deviation of 8 weeks. suppose a random sample of 39 unemployes individuals is taken find the propbablity that the sample average number of weeks unemployed is within 0.6 weeks of the population average