on the marks in Accountancy (Y) is 3 Y-5 X+180=0. The mean marks in Accountancy is 44 and variance of marks in Statistics is 9/16th of the variance of marks in Accountancy. Find the mean marks in

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are…

A: Given: Number of observations (n) = 5 Mean x¯=4.4 Variance (s2) = 8.24 The three observations are 1,…

Q: The profit for a production process is equal to $2,000 minus two times the number of units produced.…

A: Consider X is the number of units produced Here, Y = 2000-2X It is known that E(X) = 500, Var (X) =…

Q: Ve would like to compare samples from two different populations A and B. he means of these two…

A:

Q: The first three moments of a distribution about the value 2 are 1, 16 and-40 show that the mean is…

A:

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A:

Q: A population of marine gastropods has shell lengths that are normally distributed with a mean of 7…

A: We have to find given probability.

Q: How do I use Excel to calculate the SAMPLE VARIANCE of a column?

A: The sample variance of a column data can be obtained using excel function as follow: Enter the data…

Q: Run an appropriate test to compare variance between x1 and x2. What is the name of the test you…

A:

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: Proportion of Variance

A: pca is dimensionality reduction technique by performing pca we get which component explains the…

Q: Suppose it is believed that the probability a patient will recover from a disease following…

A: Here we need to find the mean and variance of the given binomial distribution.

Q: The adjusted r2 of the systolic blood pressure (SBP) in relation to whole blood cadmium (Cd) and…

A: Adjusted R square: It explains the fitness of data in a line or curve and it adjust the term in the…

Q: The total cost for a production process is equal to $900 plus two times the number of units…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A normal distribution has a mean of µ = 200 with σ = 20. If a vertical line is drawn through the…

A: Let X be a random variable such that X~N200,202

Q: The weight distribution of 100 NSU students is normally distribution with mean 70 kg and variance 2…

A: Given that mean is 70 kg and variance is 2 kg. That is,  μ=70σ2=2 i) Consider,…

Q: The mean of Binomial distribution is 3 and variance is-. Find P(1 s x < 6)

A:

Q: If X ~B(190,0.34), find mean and variance of x. (Rounded in 3dp.)

A: X ~B(190,0.34) Given a Binomial Distribution X ~B(n,p) Here, n = 190 , p = 0.34

Q: The total cost for a production process is equal to $1,000 plus two times the number of units…

A: Given Information: The total cost for a production process is equal to $1,000 plus two times the…

Q: What is the variance of X

A: here given continuous probability density function  c(1- x2)           -1 ≤x ≤ 10…

Q: A sample of 46 observations gave sample mean 20 and coefficient of variation 0.6 Then the sample…

A: Given  n=46, Xbar=20, CV=0.6

Q: The mean of a data set is 12.5 cm, and the variance is 4.0 cm. What is the z-score of 9.5?

A: Mean = 12.5 Variance = 4.0  Raw score = 9.5

Q: You subtract the root from the variance because you want the variation around the mean value to…

A: In normal distribution, the three-sigma limits are calculated by subtracting the root of variance…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: Given Data population proportion,p = 0.01 sample size n = 4400

Q: The mean of 5 observations is 4.4 and the variance is 8.24. If the three of the five observations…

A:

Q: A population of marine gastropods has shell lengths that are normally distributed with mean μ=7mm…

A: For large sample size (n&gt;30), let X be a random variable following normal distribution with mean…

Q: The r2represents the shared variance between a predictor and _______

A:

Q: Why Calculation of power is more complex for Analysis of Variance?

A: Introduction: In Statistics, power of a test is defined as the capability of a test to detect…

Q: After the analyses, Rosalind found a significant difference in test scores between taking the test…

A: The results are different because it is likely that the test statistic value obtained by Rosalind is…

Q: A normal distribution has a mean of µ = 200 with σ = 20. If a vertical line is drawn through the…

A:

Q: The variance is sometimes a negative number.

A:

Q: a) Find the mean of p, where p is the proportion of defective light bulbs in a sample of 4400 when…

A: From the given information we find the solution.

Q: Let's use the data from the previous question. Make sure to document, the mean, Variance and SD.

A: Solution-: We find mean, variance and standard deviation of given score of students.

Q: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: The athletic director at a large university compared the proportions of freshmen (1st year students)…

A: The hypothesis is, Null hypothesis: H0: There is no difference between proportions of freshmen and…

Q: The mean age of children at the X College daycare center is 6. The ages are skewed in a negative…

A: μ=6 σ2= 5.1

Q: Table below indicates the average number of injuries per thousand workers hours in a sample of 50…

A: Given information: The data represents the values of number of firms for the ranges of average…

Q: A professor has recorded exam grades for 20 students in his class, but one of the grades is no…

A:

Q: Explain the variance of the sum or difference of the two variables X and Y ?

A: Variance of sum of two variables: The variance of the sum of two or more random variable is equal to…

Q: Find the variance

A: Given : X~N(0, 7)

Q: Explain what would happen to the F ratio of this analysis of variance if 2 points were added to each…

A: We need to explain what would happen to the F ratio of this analysis of variance if 2 points were…

Q: The mean of Binomial distribution is 3 and variance is. Find P(1 < x < 6)

A:

Q: When would you use a chi-square analysis A.When the variance between two groups are equal B. When…

A: C. When you only have categorical variables to analyze

Q: is 32, the estimate of the variance of the model errors is

A: Given: multiple regression model with no of regressors k=3 and sample size n=20  also error sum of…

Q: What percentage the male population is between 72 and 76 inches in height?

A: The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches…

Q: Find the variance of x or the number of cups of coffee.

A: Given Information:

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A:

Q: If the mean of grades in statistics = 65 and the variance : 400 , then the Z score of grade 50 =

A:

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: how do I find the variance?

A: Population variance is the measure of variability of the data that is how far away our data points…