Calculate the var of x

Q: 17- In a report published in 2006, it was stated that the average age of marriage for women in…

A: Given that Population mean=25 Sample standard deviation =3 We have to find a- One researcher argues…

Q: 1) Based on the data given, estimate the following regressions: Y=a,+a₂X₂ +u₁ Y=X₁ + X₂X₁+U₂₁…

A: The regression models Model 1: Yi=α1+α2x2i+ui1Model 2: Yi=λ1+λ3x3i+ui2Model 3: Yi=β1+β2x2i+β3x3i+ui…

Q: chart for hypothesis test

A: Please find the explanation below. Thank you.

Q: Using the data in Exercise 1. 2.1 Find the mean 2.2 Find the median 2.3 Find the mode 2.4. Find the…

A:

Q: There is a 50% chance of rain here and a 25% chance of rain on Mars. Therefore, there is a 75%…

A: given data 50% chanve of rain here25% chance of rain on marstherefore 75% chance of rain here or on…

Q: Applications of Testing of Hypothesis Independent random samples selected from two binomial…

A: As we are entitled to solve one question at a time, I will answer the 1st one as you have not…

Q: For the frequency table 12 1 15 3 18 5 21 6 Class mark frequancy Compute: 1- Coefficient of Skewness…

A: Given that  1- Coefficient of Skewness  Coefficient of Kurtosis  2- State and discus the shape of…

Q: 4. Consider the following probability distribution for stocks A and B: Probability Return on Stock A…

A: Note: Hi! Thank you for the question. As you have posted multiple sub-parts, according to our…

Q: Test the hypothesis that the average number of complaints received per day when served by a Virtual…

A: Given data: The distribution of received complaints, when served by a virtual agent: The…

Q: Data were collected from 500 women in the U.S. regarding their glucose level. In the study, 25 women…

A: Given that: Population proportion, p=0.06 Sample size, n=500 Count of successes in a sample, x=25…

Q: The article "Relationship of Health Behaviors to Alcohol and Cigarette Use by College Students" (J.…

A: From the provided information, Drinking level A = male B = female Totals C = None 140 186 326…

Q: Statistics involves which of the following?

A: Statistics is studying the collection of data, analyzing data, and interpreting the data. The study…

Q: An applicant has applied for positions at Company A and Company B. There is a 40% chance of getting…

A: For the event, A as the event of getting an offer from company A, PA=40%=0.40. For the event, B as…

Q: - ) Suppose that of 1000 customers surveyed, 850 are satisfied or very satisfied with a…

A: The following information is obtained: The sample size, n=1000 The no. of customers, that are…

Q: Suppose that the measures taken from n observations are independently distributed, then a set of…

A: Solution:-  Given that measures are taken from n observations which are independently distributed,…

Q: there anything else about the experiment in Question 2 which would cast doubt on the reliability of…

A: Given Group of Motorist % of new compound Average mm  1 5 8 2 5.5 8.4 3 6 8.6 4 6.5 8.8…

Q: true, if the answer is absolutely true. otherwise, if the statement are either true or false, answer…

A: statement :  if the dataset has large outliers, than the data have positively skewed distribution we…

Q: doctor used to believe that babies were equally likely to be born any day of the week, but with the…

A: Given that   The chi-square test statistic for goodness of fit is χ2 = 12.95 and the P-value is…

Q: The weights of ice cream cartons are normally distributed with a mean weight of 10 ounces and a…

A: The question is about normal distribution Given : Popl. mean weight of ice cream cartons ( μ ) = 10…

Q: What is the expected number of successes for a binomial distribution when n = = 5 and p = 0.3? H np…

A: Givenn=5p=0.3

Q: The average monthly water level in (m.a.s.) tor a dam for one year were 58.5 56.7 57.2 58.3 56.4…

A: Data given 58.5,56.7,57.2,58.3,56.4,55.5,62.8,63.7,62.5,60.4,59.9,59.3 Note: According to Bartleby…

Q: The median divides the array into two equal parts. True O False

A: Median is the middle number of the data when the data is sorted into either ascending or descending…

Q: A city recently held interviews for 4 jobs available. Even though there were 12 Republicans among…

A: Given that The total number of applicants is 20 The number of  republicans is 12 The number of jobs…

Q: 7. What is the expected value for the example on page 4 that involves a contractor? O $37,800…

A:

Q: The data to the right represent the top speed (in kilometers per hour) of all the players (except…

A: speed number of players  10-15.9 8 16-21.9 17 22-27.8 237 28-33.9 334

Q: The number of times that a group of randomly selected students at Cañada College unlock their phones…

A: The question is about confidence interval Given :   To find : a ) Construct 95 % CI for the avg.…

Q: Consider the frequency table Mr. Rosencrantz made from the densities that some of his students…

A: The frequency table Mr. Rosencrantz made from the densities that some of his students calculated as…

Q: 10. In the previous question (#9), what would be the value of the mean to use for the z-score…

A: Given information n=40, p=0.45 P(X>29)=?

Q: Problem 2: The fuel economy (in km/L) of two types of car engines were measured by testing 25 trials…

A: given data engine 1x¯1  = 14.5s1 = 0.6n1 = 25engine 2x¯2  = 15.5s2 = 1.2n2 = 25α = 0.05claim : μ1…

Q: Question 3 random variables. Define Y as the sum of squares of these random variables: Suppose that…

A:

Q: According to a new study by ABC, the average time spent by young adults ages 20 to 25 in using their…

A: Given that

Q: the -Set Venn Diagram below that represents A. by shading the correct region(s) In a Venn diagram. O…

A: Objective of this question is that which option is the correct choice.

Q: The lengths of adult males' hands are normally distributed with mean 194 mm and standard deviation…

A: Given that: Population mean, μ=194 Population standard deviation, σ=7.1 Sample size, n=7

Q: A random sample is obtained from a population with a mean of µ = 20. After a treatment is…

A: A random sample is obtained from a population with a mean of µ = 20. After treatment is administered…

Q: (a) A lecturer borrows £10,000 from a bank with an effective interest rate of 3.5% per annum. She…

A: Given data : A = 10,000 r = 3.5%  n = 5 Find :  Future  value

Q: Let {Sn. n ≥ 0} be a simple random walk with So= 0 and S₂ = X₁ + ... + X₁, for n ≥ 1, where ,i =…

A: Given information: It is given that {Sn ; n > 0} is a simple random walk with S0 = 0 and Sn = X1…

Q: could you please tell me how to explain to a friend who does not know anything about statistics the…

A: Solution:- Sure! In hypothesis testing, a confidence interval represents the range of values that we…

Q: What are the consequences of the violation of the OLS assumption cov(x;, e;) = 0?

A: A linear Regression  model consist of one dependent and one independent  variable.

Q: Using the MA4 forecasting method for the time series "32, -24, 16, -8" the forecast for the next…

A: Given forecasting method is MA4. That is, Moving average with period 4. Formula for forecasting by…

Q: The first step in conducting an hypothesis test is the collection of sample data. O True False

A: Introduction The hypothesis is an assumption which is being tested.

Q: need clear ans and solve very very fast in 20 min and thank you | ᴅʏʙᴀʟᴀ

A:

Q: The diameter of steel rods manufactured on two different extrusion machines is being investigated.…

A: The question is about hypo. testing Given : Random selected no. of rods from first machine ( n1 ) =…

Q: Doing Chauvenets criterion, why isn’t some the di/standard deviation values negative. For example…

A: The general method of Chauvenets criterion involves calculating deviation d, using formula : d = | x…

Q: Consider a standard Normal random variable Z ∼ N(0,1). Use the method of cumulative distribution…

A: We will use CDF method to find the pdf of U = Z5.

Q: Explain how the author probably got the “79 percent higher” statement in the third paragraph of the…

A: ANSWER: A. The author probably got the "79 percent higher" statement by comparing the number of…

Q: ?, known as the Classical Linear Regression Model (CLRM), where y is the dependent variable, X is…

A: Let us consider the linear model y = a+bx y dependent variable x  independent variable vector…

Q: i. State any necessary assumption about the underlying distribution of the data (assume that both…

A: Let X1 be the random variable that the efficacy of the isotonic method. X2 is the random variable…

Q: On her 45th birthday, Lisa Martin takes out a 20-year endowment policy with a £50,000 death benefit…

A:

Q: You're playing poker with some friends, and are to be dealt 5 cards from a well-shuffled deck. a.…

A: Suppose a well-shuffled deck have 52 cards. And 5 cards are dealt from a standard deck. In the deck…

Q: 7. In 2005, the Edmonton Miners hosted The Minto Cup Junior A Lacrosse Champic Here are the 2005…

A: Given data: Player Games Goals Assists Points Penalty minutes Jeremy Boyd 13 2 8 10 54 Dan…