4. Describe the distribution of sample means (shape, expected value of the mean, and standard error of the mean) for samples of n=100 selected from a population with a mean (u) =40 and standard deviation (g)=10.

Q: The number of absences last year for students at a large high school has a mean of 5.6 days with a…

A: The sampling distribution if mean is given as Hence, the mean of the sampling distribution is 5.6…

Q: 4. There were 17 sophomores who took this course with a mean score of 66.5 and a standard deviation…

A: (a)   State the hypotheses.   Obtain the degrees of freedom.   The degrees of freedom formula for…

Q: 2. Researchers found that students who binge drink spend a mean time of 4.9 hours drinking during…

A:

Q: A science teacher claims that the mean scores on a science assessment test for girls are equal. The…

A: Given that  Sample sizes n1=18  , n2=20 Sample means x1=153 , x2=149 Standard deviation s1=23 ,…

Q: Response to allergen inhalation in allergic primates. In a study of 12 monkeys, the standard error…

A: From the provided information, Sample size (n) = 12 Standard error (SE) = 0.4

Q: describe the distribution of sample means (shape, expected value, and standard error) for samples of…

A: Given : population mean= 90 population sd = 32 sample size = 64

Q: A negatively skewed population with a mean of 181 and a standard deviation of 84 What is the mean…

A: GivenMean(μ)=181standard deviation(σ)=84

Q: The Maxwell Steel Company in Philadelphia produces steel rods. The lengths of the steel rods are…

A:

Q: How does a sample size affect how close a normal distribution of either sample means or sample…

A: As per Central limit theorem, the sampling distribution of sample mean or sample proportion follow…

Q: Suppose speeds of vehicles traveling on a highway have an unknown distribution with mean 63 and…

A: Given that the speeds of vehicles traveling on a highway have an unknown distribution with Mean(µ) =…

Q: A manufacturer of 8-watt LED downlights has past data that shows the lifespan of the downlight is…

A: Given information: A manufacturer of 8-watt LED downlights shows that the lifespan of the downlight…

Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A:

Q: having a mean equal to 21 and a standard deviation equal to 8. (a) Describe the shape of the…

A: Given that.   X~N( μ , ?)   μ=21     , ?=8  , n=79

Q: .Suppose x has a normal distribution with mean ? = 50 and standard deviation ? = 12. (a) Describe…

A: Note: Please repost remaining questions as i can answer only 1 question as per my policy.  Given,…

Q: A researcher collects data that represents the average number of hours of sleep in the last two…

A: We have given number of hours of sleep for depressed and non depressed people's and we have to…

Q: amdom variable with a mean =13.2 and standard deviation =5.6 Ramdom samples of fixed size n=12 are…

A: As the population distribution is normal, it can be said that the distribution of the sample with…

Q: Calculate the z-score for sample means (single-sample z-test) using this data set. You can assume…

A: Mean = 10 Standard deviation = 5

Q: marketing study was conducted to compare the average age of male and female buyers of a certain…

A: We want to conduct a test to determine whether the mean age of all female buyers is higher than the…

Q: 12. The red blood cell count for a population of adult males can be approximated by a normal…

A: GivenMean(μ)=5.4variance(σ2)=0.16standard deviation(σ)=0.16=0.4

Q: 2. Factory produces whiteboard markers. The production process can be modelling by normal…

A: Solution According to guideline we solve only three subpart

Q: How many times per day does an American access the internet? Suppose that the distribution of the…

A: Given that, The mean of the sampling distribution is, The standard deviation of the sampling…

Q: Indicate the mean and the standard deviation of the distribution of means for each of the following…

A: Given: Population mean Variance Sample size, n 100 40 10 100 30 10 100 20 10

Q: 2. (b) Date Bio člass, students want to know if the species of plant had any effect on the number of…

A: Given data:

Q: suppose that a recent poll found that 63% of adults believe the overall state of moral values is…

A: given data  sample size n = 250   P(believe moral value is poor) = p = 0.63 x = number of adults who…

Q: (a) 60% of the distribution below it, (b) 75% of the distribution below it, (c) 80% of the…

A: standard normal distribution Z~N(0,1) we have to find value of z such that  (a) 60% of the…

Q: A marketing study was conducted to compare the average age of male and female buyers of a certain…

A: There are two cases which are women and men. The both samples are independent and follows normal…

Q: The standard deviation of the distribution of sample means is also known as the: O standard error of…

A: According to the Central limit theorem, the sampling distribution of the sample mean is the normal…