A sample of n = 9 scores has SS = 200. What is the variance for this sample?

Q: A sample of n=4 scores has SS=60. what is the variance for this sample?

A:

Q: A researcher uses analysis of variance to test for mean differences among three treatments with a…

A: Analysis of variance or ANOVA is a hypothesis testing which is used to compare more than 2 means.…

Q: A population has SS - 100 and variance, o-4. What is the value of EX - jal for the population? O 100…

A: given that ss of population=100 variance σ2 =4 σ2= [Σ(x-μ)2]/N where N is number of data

Q: Suppose X has finite variance. Let Y = |X|. Does Y have the same, a smaller, or a larger variance…

A: Given that X has finite variance i.e. var(x)<∞ Let Y =|X| that means Y can take 2 values i.e. X…

Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?

A: We need to use the concept of variance.

Q: u have a sample of 16 values from a normal distribution with mean 25 and variance 64,then the sample…

A: Given data, n=16Mean μ=25Variance σ2=64standard deviation is σ=8

Q: Suppose that a sample of n = 12 pairs of X and Y scores has SSY = 90 and a Pearson correlation of r…

A: The hypotheses are stated below: Obtain value of the test statistic. The value of the test…

Q: Two samples, each with n =5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given: Let the pooled variance be sp2 n1=n2=5   Let the standard error be SE Formula for Standard…

Q: A sample of 12 scores has a variance of s2 = 48. What is the estimated standard error for the sample…

A:

Q: If X is a normal variate with mean 5 and variance 4. Find P ( -1.5 < X < 2)?

A: Given,mean(μ)=5standard deviation(σ)=2

Q: An analysis of variance produces SSb = 30, SSw = 60, F-ratio with df = 2, 15.      For this…

A: From the provided information, SSb = 30 and SSw = 60 Degree of freedom (k - 1) = 2 And (n - k) = 15

Q: What mathematical operations could I do to every score in my distribution list that would have no…

A: Mathematical operation  Adding/subtracting

Q: 4) Explain why outliers are weighted higher in the Variance equation WIR. n-1 (xi -x)2 Is this a…

A: Outliers are the data points that does not follow the common trend of the data. Data with many…

Q: A sample of n = 4 scores has a variance of s2 = 64. What is the estimated standard error for the…

A: Sample size, n = 4 Variance = 64

Q: An analysis of variance produces df between = 3 and df within = 24. If each treatment condition has…

A: In ANOVA, Degrees of freedom between treatments is given by (k-1)  Where k = no. of groups. Degrees…

Q: The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes…

A: Note: According to our guidelines we can answer only first three subparts   The table to the right…

Q: A sample of 4 scores has a variance of s2 = 64. What is the estimated standard error for the sample…

A: Standard Error:  Standard error gives the accuracy of a sample mean by measuring the…

Q: A sample of n = 9 men are asked." what is the fastest you have ever driven a car?" The sample mean…

A: Given: n=9

Q: Assume that you have a binomial experiment with p = 0.4 and a sample size of 120. What is the…

A: Given that, From binomial experiment, Probability, p = 0.4 Sample size, n = 120

Q: Suppose a random variable, x, arises from a binomial experiment. Suppose n = 8 and p = 0.62 (Must…

A: Given data, n=8 p=0.62

Q: If a data set has 25 values and a standard deviation of 7.4, then the variance is?

A: Given: Standard deviation = 7.4

Q: The weights (in kg.) of 8 students of class VII are 38, 42, 43, 50, 48, 45, 52 and 50. Test the…

A: Data given  38,42,43,50,48,45,52,50  Population variance=σ2=48

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: The formula for total variance (SST) is

A: Solution:-

Q: What is formula for the variance of the population?

A:

Q: b) The variance estimator from the two-stage cluster sampling will be always smaller than the…

A: Given problem Given that   The variance estimator from the two-stage cluster sampling will be…

Q: If you have a Pearson correlation coefficient of .30, what is the proportion of variance accounted…

A:

Q: The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes…

A: ( b ) d.f N is = ? d.f D is = ? The  critical value = ? The rejection region is ?

Q: The standard error of a 16-unit sample of a variable with a mean of 20 and a variance of 64

A: Given data,Mean μ=20Variance σ2=64standard deviation =Varianceσ=64σ=8If n=16Standard error(σx)=?

Q: What does it mean that the variance (computed by dividing by N) is a biased statistic?

A:

Q: The standard deviation of a sample of 100 observations equals 64. The variance of the variance…

A:

Q: A sample of n = 9 scores has a variance of s2 = 36. What is the estimated standard error for the…

A: Estimated standard Error of Mean =    Given, n=9 S2=36 Therefore substitute n,S2   in above…

Q: Consider a population with variance 41 and mean 1. What is the z-score for a the value x = 20? Round…

A: Given: Variance= 41 Mean =1 To find: z-score for the value x=20

Q: The blood pressure and weight if Jellystone Park bears are correlated and .6 is the correlation…

A: Introduction: Consider that x is the independent variable and y is the dependent variable. The size…

Q: Assume that you have a binomial experiment with p = 0.4 and a sample size of 50. The variance of…

A: X be a random variable that follows binomial distribution with probability of success 0.40 and…

Q: Given that age of ECU students is normally distributed. A random sample of 16 students had an…

A:

Q: A sample of n = 25 scores has a mean of x̅ = 65 and an estimated standard error of sM = 2 points.…

A: Given that, x̅ = 65sM = 2 n=25 The formula of sample variance is, Using the standard error of…

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given Datan1 = n2 = 5pooled variance = 40Estimated standard error is given by

Q: A repeated-measures analysis of variance for a study comparing three treatment conditions with a…

A: Given information 3 treatments n = 20 participants F-ratio = 6.40 P-value = 0.0075(Using Excel = F.…

Q: The F-statistic is a ratio score resulting in a measure of the estimated proportion of variance due…

A: The F-statistic is a ratio score resulting in a measure of the estimated proportion of variance due…

Q: Assume that you have a binomial experiment with p= .3 and a sample size of a 100. The value of the…

A: Conider a binomial random variable "X". The variance of the random variable X is given by:

Q: If the probability of hitting an object is 0.8, what would the variance be?

A: Given problem Given that   If the probability of hitting an object is 0.8, what would the variance…

Q: = 8 and

A: Here it is given that - n=4 ∑X=8 ∑X2 = 40

Q: the homogeneity of variances assumption states that the variance in the two samples must be equal?…

A: Homogeneity of variances always make about the population variance not about sample.

Q: sample with SS=30 and a variance of s2 =10 has n=4 scores. True or False?

A: Given that  Sum of squares (SS) = 30 Variance ( s2) = 10 Sample size (n) = 4   We know that…

Q: The table to the right shows the cost per ounce (in dollars) fora random sample of toothpastes…

A: For the give data Find F= ?

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.