Sample mean is 48, population mean is 45, and standard deviation is 3: • What is Cohen's D, and is this a small, medium, or large effect?

Q: Suppose a population has three values 13, 17 and 24. What is its variance?

A: Given: n=3 The mean of the data is obtained as below: Mean=∑xn=13+17+243=543=18 The mean is 18.

Q: A normally distributed population has a population mean ? = 21 and standard deviation ? = 4. What…

A: Given Information: Mean = 21 Standard Deviation = 4

Q: 2. The average time spent sleeping (in hours) for a group of medical residents at a hospital can be…

A: Given that  X~N(μ= 6.1 , σ= 1) μ= 6.1 , σ= 1 Formula for Z-score Z=(X-μ)/σ

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: 2. What is the z-score of x if x = 2 and the median = 4, the mean = 5 and the standard deviation =…

A: Given Mean μ = 5median = 4Standard deviation σ = 2

Q: What information is provided by calculations of the “t” test statistic?

A:

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: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: What is STANDARDIZED EFFECT estimates Cohen’s d?

A: Cohen’s d is an effect size which is used to indicate the difference between two sample means…

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: The analysis of variance (ANOVA) is a procedure that allows statisticians to compare three or more…

A: ANOVA stands for Analysis of Variance. It is a statistical method that separates observed variance…

Q: If the standard deviation of sample A  is 5 and the standard deviation of sample B  is 12, what is…

A:

Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: If the population mean weight is increased to 100.15 lb, what is the probabilitythat the sample mean…

A: As per given by the question, what is the probability that the sample mean of weight of a sample of…

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: a population was normally distributed with a mean of 10 and standard deviation of 2. What…

A: Given data,Mean μ=10sd    σ=2P(X<12.5)=?

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: Question 2 Under which two conditions might the standard deviation be a misleading measure of…

A: Standard deviation is the square root of variance. Variance is used to measure the spread of a…

Q: If a set of 20 values has a variance of 9, what is the standard deviation of the set?

A: Given that n=20, Variance=9

Q: Suppose you were to take samples of size 100 from a population with a mean of 12 and a standard…

A: The formula of the standard error of the mean is,

Q: When the population is N=9 and the scores are 4,2,0,5,3,2,1,7,3 what is the SS, variance and…

A:

Q: 1. Hypothesis: Reality TV watchers differ from the population in emotional intelligence (μ= 100, σ=…

A: mu = 100 xbar = 102.5 sigma = 15 n = 144

Q: What information is provided by calculations of the “F” test statistic?

A:

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: If the true mean is .9560 with a standard deviation of .0020 what is the sampling distribution of X

A: if the true mean is 0.9560 with a standard deviation of 0.0020 i.e.  μ=0.9560  and σ = 0.0020

Q: If the sample size (n) and probability of success (p) are given, which equations are used to…

A: 1) Given,Sample size = n (fixed)Probability of success = p (for each trial).So, probability of…

Q: For a population with population mean 80 and standard deviation10, what is the z-score corresponding…

A:

Q: If mean is 20 and standard deviation is 5, what value of x contain the lowest 20% of the…

A: Solution

Q: The mean and variance of a sample of 25 data items are 78 and 100, respectively. Use Chebyshev's…

A:

Q: 1In a sample of 105 people 54 were in favor of a zoning change. What are the mean and standard…

A: Answer - In a sample  n = 105, people (x) = 54 were in favor of a zoning change.      What are the…

Q: What does the standard deviation measure?

A:

Q: 2. What is the difference between the standard deviation and the coefficient of variation? When is…

A: Standard deviation: Stan. deviation shows how far the observations are form the mean of the data.…

Q: population nds

A: Given Let the mean =x Then score=x-6