Which of the sections had the most variance in the scores?

Q: I'd you chose to compute a median for a variable, which measure of variability would you most likely…

A: Introduction: It is required to identify the measure of variability that is most likely to be…

Q: Create a Scatterplot of y against estimated median SAT among college freshmen.

A: Here, we have given the data for 2016 graduation rate and full-time undergraduate student to faculty…

Q: Histogram 40 150.00% 30 100.00% 20 50.00% 10 Frequency 0.00% -Cumulative % Bin Histogram 40 150.00%…

A: Given, here given two histograms .   To determine, these graphs are left skewed or right skewed?

Q: Corn crop is often prone to contracting a disease called leaf blight from a type of fungus. This…

A: Given that  X Frequency 0 8 1 22 2 31 3 20 4 4 5 13 6 2

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: b) Rachel received the following scores on the midterm and final examinations in his introductory…

A: The normal distribution is the bell shaped distribution which is centred at the mean. This is also…

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: 3. How was the data collected?

A: Data collection is an important part because the whole analysis will depend upon the collected data.…

Q: When a data set has one or two values that are much higher than all of the others which of our 3…

A: As Mean is found by adding all the values and dividing by the number of values So if one or two…

Q: What  statistical test( from the data)  should be used to check whether people choose each type of…

A: Chi-square goodness of fit test: The Chi-square goodness of fit test is used to test whether or not…

Q: Under what conditions would it be better to use the median instead of the mean?

A: n statistics, three measures of central tendency are widely used. These three measures are also…

Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

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: In the 5 models above, which variable, by itself, explains the greatest proportion of total variance…

A: Predictor P for variable X3 is larger among all other variables. Hence variable X3 explains that…

Q: You have a dataset with a mean of 2, median of 3 and variance of 9.  What is the skewness?

A: Given that  Mean = 2 , Median = 3 , Variance = 9

Q: In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the…

A: There are 3 independent samples which are Goliath, Varmint and Weasel. We have to find the variance…

Q: A set of data has a mean of 16,  a median of 15 and a mode of 14. which of these numbers must be…

A: From the information, the mean is 16, median is 15 and mode is 14.

Q: The cumulative relative frequency graph shows the distribution of the percent of foreign-born…

A: z score is values is shows us how many number of standard deviations away from the mean , i.e below…

Q: Which battery has the greater median? A Rejuvenate has a greater median by about 10 days. Rejuvenate…

A: Median: It is the middle most (mid point) value of the data that divides the whole data into two…

Q: Find the variance of the number of storms in August.

A: X: Number of thunderstorms in August.

Q: How many degrees of freedom does the sum of squares errors have?

A: Degrees of freedom for  sum of squares errors is given by (N-k) in one way ANOVA

Q: The stem-and-leat display repr members of the class. Identify the mean, median and mode for the data…

A: According to the given information, we have The stem and leaf is given. Data 47 50 55 57 63 64 64 66…

Q: Find the z-scores that separate the middle 86% of the distribution from the area in the tails of the…

A: Solution-: We find the z-scores that separate the middle 86% of the distribution from the area in…

Q: 17. Sharon made 85, 84, 89, 90, and 77 on her five math quizzes this six weeks. What is the median…

A:

Q: Compare the two sets of ratings by finding the ranges, medians and quartiles.

A: Data representing the ratings of the cereals with fat content 0 and with fat content 1.  Fat content…

Q: Use the probability distribution to complete parts (a) and (b) below. The number of defects per 1000…

A: mean=μ=E(X)

Q: Suppose that in a small town of 50 people, one person earns $5,000,000 per year and the other 49…

A:

Q: 6.34 As in Exercises 6.6, 6.10, and 6.20, in a study of the particulate pollution in air samples…

A: Given that, the joint pdf of X and Y is,  f(x,y)= 1  ; 0<=x<=2 ; 0<=y<=1  ; 2y<=x…

Q: Compare the mean and the median of a data set that has a symmetrical distribution

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: What is the analysis of variance.Interpret results

A: The analysis of variance is a statistical tool which splits the overall or aggregate variability in…

Q: 18. Jerry scored 80, 85, 87, and 88 on his irst four tests in science. Which is the score on his…

A: Solution: The objective is to find the fifth score

Q: Two classes write the same test. Class 1 (n=32) has a mean number of points of 720 (M=720, s=20) and…

A: We have given two classes write the same test.For class 1-Sample size n1 = 32Mean M1 = 720Sample…

Q: FInd the Mean and Median of Both Boys and Girls

A: Given data,For boys:10,7,8,11For girls:6,9,8,5

Q: Mean 1 = 17, SD 1=7.89 Mean 2= 89, SD 2= 6.69 R = -0.84 What is the proportion of variance shared…

A: Obtain the value of the correlation. The value of the correlation is obtained below as follows: From…

Q: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

A:

Q: what is the  z score of 128,101,116,119,131 when the mean is 119 and variance is 36

A: It is given that  Mean, μ = 119 Variance, σ2 = 36 Standard deviation, σ = 6 Z-Score, Z = ( X - μ )/σ

Q: data has extreme scores, what is the best measure of average?

A: The mean is the average value of the data set. It is calculated by summing up all the observations…

Q: uppose the graduate teaching assistant for Intro Stat at the University of Florida also collected…

A: Let us define the variables: Y: Percentage Grade. X: Average Study Hours Define the dummy variables…

Q: How can I Calculate the mean and median of the data set by hand.

A: Statistics is the branch of Applied Mathematics in which we do collection, analysis, interpretation…

Q: Find the range, variance, standard deviation, and coefficient of determination.

A: Concentration of all the values around the central value of the given data is known as measures of…

Q: A given set of data has a specific variance. Describe what will happen to the variance when all the…

A: Suppose, data is X=(10,15,20,25,30)

Q: The foreman at a large plant estimates that there are defective parts about 1% of the time.  If the…

A: It is given that n =20,000 and p = 0.01.