The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The average age of the pilots is 37 years, with a variance of 36 years. Which data set is more variable?

Q: A population of grades for a statistics class of six students is given below:   80 74 65 84 85 70…

A: From the provided information, The population data is as follow: 80, 74, 65, 84, 85, 70

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: In one​ city, 24​% of adults smoke. In groups of size 140 of​ adults, what is the variance of the…

A: Givenp=0.24n=140x~Binomial(n=140,p=0.24)P(X=x)=(nx)×px×(1-p)n-x      ; x=0,1,2...,n

Q: The following table shows the results of an analysis of variance comparing three treatments. What is…

A: Given that the table shows the results of an analysis of variance comparing three treatments.

Q: How the squared curvilinear correlation, η2, reflects the proportion of variance?

A: In analysis of variance, either for regression model or for design, if the proportion of variance is…

Q: If the variance for the weight of a sample of six boxes is 28.2 kilograms squared, what is the…

A:

Q: how to find the variance?

A: Variance is a measure of variability. It is computed by the average of squared deviations from the…

Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

Q: A pet association claims that the mean annual costs of food for dogs and cats are the same. The…

A: From the provided information,

Q: A value of r2=.09 is considered what for the effect size test of the percentage of variance…

A: Given, r2=0.09

Q: Is there a significant difference at =α0.01 in the mean heights in feet of waterfalls in Europe and…

A: State the Null and Alternate Hypothesis.

Q: dy Question: 2. In order to determine the average weight of carry-on luggage by passengers in…

A:

Q: Given a sample data set with a Coefficient of Variation of 40.2 and a Mean of 5.0, what is the…

A: Given: Coefficient of variation = 40.2 Mean X = 5 Formula Used: Coefficient of variation = SX×100…

Q: The speeds of motorists passing a particular point on a motorway are found to be normally…

A: Given that, The percentage of motorists whose speed exceed 120 km/h is,

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

A:

Q: What is the value of the sample correlation r?

A: It is given that Regression line : y = -3.05 + 0.10x Number of observations n = 13 Number of…

Q: c) Find the mean and variance of flights delayed per hour.

A: The probability distribution is x p(x) x*p(x) x2p(x) 0 0.10 0 0 1 0.08 0.08 0.08 2 0.07…

Q: What is the correlation coefficient for this data set? r=

A: here given ,  the regression line equation   y = -74.19x + 47.89 so slope = -74.19 y- intercept  =…

Q: The accounting department analyzes the variance of the weekly unit costs reported by two production…

A: See the handwritten solution

Q: Discuss the Skewness and Kurtosis and find the mean and the variance for the following ungrouped…

A: From the given information we want to find skewness, kurtosis and mean variance.

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 r2represents the shared variance between a predictor and _______

A:

Q: The average number of matches where the football matches of the Galatasaray football team were…

A: Given : The average number of matches where the football matches of the Galatasaray football team…

Q: The difference between the largest and the smallest data values is the А. variance В. interquartile…

A:

Q: The purchase value of transactions at a grocery store is normally distributed with a mean of $244…

A: Consider X be a random variable which follows normal distribution indicates the purchase value of…

Q: Define the term Sample Correlation? why it is used in linear equation?

A: Correlation measure linear relationship between the variables.   Correlation: Correlation is used to…

Q: Find the variance of these data

A: From the given given sample data : n=5 , ƩX=105 , ƩX2=2333  Our aim is to find the sample variance

Q: Suppose that 67% of college students in Australia use more than 1.65 gigabytes of data on their…

A:

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

A:

Q: the accounting department analyzes the variance of the weekly unit costs reported bytwo production…

A:

Q: Salaries for administrative assistants range from $32,000 per year to $67,000 per year. Salaries for…

A: Introduction: For administrative assistants, minimum salary per year = $32,000, and maximum salary…

Q: Hi! I need help solving the attached question. This is my first time using Bartleby so please let me…

A: The test for equality of more than two variances is done with MINITAB software.The results are given…

Q: Given data points (2. -1). (2, 1). (3, 2). (0,- 1)and (3, -1). find the total variance of the data.

A: Given:  Data :  (2 , -1 ) , (2 , 1 ) , (3 , 2) , (0 , -1), (3,-1)

Q: what test is used to determine whether two population means are different when the variance are…

A: Solution :  when the variance are known and sample size is large then we use z test to determine…

Q: What does less replicates mean in the context of understanding variance of data?

A: When the distribution has less variability then the data is more consistent.

Q: interpret this results by testing each correlation hypothesis.

A: Given:  Correlation coefficient r=0.005 Hypothesis: Null hypothesis: H0: ρ=0 Alternative hypothesis:…

Q: What is the symbol for the sample linear coefficient correlation?

A: Linear correlation coefficient is denoted by r.

Q: If the correlation is .8, then 40% of the variance is explained?

A: The given statement is incorrect.

Q: Determine the mean and the variance of X.

A: Given that  f(x) = 0.125 x    for 0<x<4   We know that  Mean = E(x) = ∫x.f(x) dx variance V(x)…

Q: If all of the students in a class earn the same score on a quiz, what should be said about the…

A: Given question: If all of the students in a class earn the same score on a quiz, what should be said…

Q: A group of patients were classified in terms of their smoking habits and the incidence of…

A: A cross-tabulation is the representation of the frequencies for two categorical variables where one…

Q: Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the…

A:

Q: What is the TWO SOURCES OF VARIABILITY?

A: The total variation is portioned as follows: SST=SSTR+SSE

Q: find the variance for the given data 7 7 2 5 1

A: The mean of the data can be calculated as:

Q: We are interested in determining whether or not the variances of the sales at two music stores (A…

A:

Q: Once the correlation coefficient is known, how can we find the amount of the shared variance?

A: Concept:  correlation coefficient measures the degree of linear relationship between two variables.

Q: Compose the score values for 3 samples that have the same mean and median, but differ in the amount…

A: Part 1   2, 4, 6 3, 4, 5 4, 4, 4     Explanation: Part 1   There are many different conceivable…

Q: If covariance between X and Y variables is 10 and the variances of X and Y are respectively 16 and…

A: The objective is to find correlation coefficient

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…