Suppose that Var(X) = 962.54, Var(X) = 13177.8, and Cov(X,Y) = 3143.51. What is Var(.87X + .13Y)? Suppose that Var(X) = 860.32, Var(X) = 9545.71, and Cov(X,Y) = 2535.12. What is Var(.77X + .23Y)?

Q: n average, Americans have lived in 3 places by the time they are 18 years old. Is this average a…

A: given data, n=52x¯=3.36s=1.2α=0.05claim:μ≠3

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated…

A: Binomial formula has used to answer this question.

Q: 1) Interpret the multiple coefficient of determination R-square.  2) Compare the R-square of the…

A: We are provided with summary output of regression as given in the question.

Q: TION 7 ndom sample of 1000 college applications showed that 747 (of those applications were…

A: According to the given information in this question We need to find the value of test statistic

Q: The following data was collected from a filling process for the volume of liquid in a container.…

A: Given that Fill Volume: 9, 15, 26, 30, 32, 32, 35, 36, 38, 40, 40, 45, 58 We have to find outliers…

Q: Using a chi square distribution, find c, given the following probabilities with 29 degrees of…

A: The following information has been provided: The degrees of freedom are df=29.

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: Given: Lower bound = 19 Upper bound = 27 Formula Used: Margin of error = Upper bound - Lower bound2…

Q: 3. The scatterplot shows the ages, a, of 10 army drill sergeants and the time, T, it took each to…

A: Note:  As per guidelines we will solve the first question only, please repost other questions for…

Q: The monthly salaries of parents/guardians of pupils at an exclusive boarding school have a normal…

A: Given that Population mean μ=150000 Let X denote the monthly salaries of patients…

Q: Q. 34 Estimate the parameters μ and a2 of the normal distribution by the method of moments.

A:

Q: What formula is used to find the standard error of mean?

A: we have to give correct formula to find standard error of mean.

Q: A 99% confidence interval estimate can be interpreted to mean that 99% confidence that we have…

A: A 99% confidence interval estimate can be interpreted to mean that 99% confidence that we have…

Q: Find the area under the normal curve and above the interval ​[44​,57​] on the horizontal axis.

A: given data, normal distribution μ=50σ=5we  have to find out the p(44<x<57)=?

Q: What do you understanding by a distribution function?

A: Here, need to define a distribution function.

Q: Answer the following problems. Apply the different steps in hypothesis testing. 1. A sales manager…

A: Given data: Veniz Alyson Alyxa Elijah 20 28 23 31 24 22 30 25 26 24 29 26 30 25 20 27…

Q: QUESTION 4 Find the p-value for a left tailed test, if z-stat = -1.43.

A:

Q: Q. 38 What modification in minimum-x² method of estimation gives rise to the method of modified…

A:

Q: What is the advantages of systematic sam- pling?

A:

Q: In working for a local retail store, you have developed the following estimated multiple regression…

A: a) Null Hypothesis: H0: The constructed multiple regression model is not statistically significant.…

Q: the joint distribution of Y and X is given by: 4/3 · ln y, and the follow boundary: 0<x<y<1…

A:

Q: No Parker a single mother is 20 years old. She is calling you for an insurance consultation. Her…

A: Given:-                  Annual premium = 350                coverage per thousand = 420

Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1384…

A: Given that,  n1= 1328 and X1= 428  n2= 766 and X2= 219 The p1^ = X1/n1 =428/1328 =0.3223 p2^ = X2/n2…

Q: 12. A stochastic matrix P is called doubly stochastic if Ei Pij = 1 for all j. It is called…

A:

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: Given The cumulative area is 0.4612.

Q: 9. Find the characteristic functions of the following density functions: (a) f(x) = ex for x € R,…

A:

Q: The following data on sale price, size, and land-to-building ratio for 10 large industrial…

A: Given the data on the sale price, size and land-to-building ratio for 10 large industrial properties…

Q: Use the given data set to complete parts (a) through (c) below. (Use α = 0.05.) KNOW 9 X y 6- 4- 2…

A:

Q: The time spent studying (in hours) for the final exam by students in a certain university has…

A: Given  Standard deviations σ=8  n=sample size=4

Q: Determine the test statistic. Test Statistic = (Round to two decimal places as needed.) Find the…

A: The data shows the ratings of adindex for  for two ads.

Q: A food quality inspector records the freezer temperature of a random sample of freezers from 11…

A:

Q: Write TRUE if the statement is unconstitutionally true, FALSE if otherwise.   1. That the…

A: Central Limit theorem (CLT)

Q: uppose the population is now all adults employed at VCU who have a primary care physician. The…

A: Given that: Population mean, μ=8.1 Population standard deviation, σ=4.8 Sample size, n=256

Q: Find the value for each ta/2 Prompt n = 26 for the 99% confidence interval for the mean.

A:

Q: In a survey, 1500 adults in a certain country were asked how many hours they worked in the previous…

A: The given interpretation is 'we are 95% confident that the mean number of hours worked by adults in…

Q: The table below lists the numbers of audience impressions​ (in hundreds of​ millions) listening to…

A: The question is about correlation Given :   To find : Testing of correlation coefficient

Q: Q. 23 If X is a Poisson variate with parameter μ, find the maximum likelihood estimate of µ.

A: Mle is that value of parameter which maximize the likelihood.

Q: Assume that the sample of paired data is a simple random sample. 2) Use the given data in Question…

A: The question is about correlation Given :   To find : a ) Null and alt. hypo  b ) Test stat c ) p…

Q: Q. 23 If X is a Poisson variate with parameter µ. find the maximum likelihood estimate of μ.

A:

Q: Q.59 Comment on the efficiency of cluster sam- pling as compared to simple random sampling without…

A:

Q: What do you understanding by a distribution function?

A:

Q: Calculate the mean squared Actual Demand for Cat Hammocks 150 156 136 150 174 280 217 213 Question 4…

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

Q: a) Prove that if YE(A), then for all t and s, P{Y >t+sY>t} = P{Y > s}. (2.16) b) Prove that if Y is…

A: As asked, I have solved the question (b). Please find the solution below. Thank you.

Q: An environmental researcher wants to know whether the mean amount of sulfur dioxide in the air in…

A: Type I error is rejecting the null hypothesis while it is true Type II error is failing to reject…

Q: A researcher wonders if there an association between the incidence of colds and the amount of…

A: Given that: Level of significance, α=0.10 Observed Frequency table is:   At least one cold No…

Q: Find the value for each ta/2

A: From given data we have : n=15 confidence interval 96%

Q: 10) The following table shows the sample subjects cross-classified by gender and the type of violent…

A: Given that By using Chi- square test statistics method. Gender No victimization Partner Non…

Q: The observed frequencies are provided in a contingency table of two categorical variables A and B.…

A: Expexted cell frequenciesEij=Ti*TjGrand Total

Q: 9. A sequence of biased coins is flipped; the chance that the rth coin shows a head is Or, where Or…

A:

Q: It is claimed that the proportion of all part-time adult workers in US who are female is 74%. In a…

A: Given: Population proportion P = 0.74 Sample size n = 134 X = 89 α = 0.08 Formula Used:…

Q: In a certain barangay, LGU distributes "ayuda" benefits to each family with a mean of 3,200 pesos…

A: Given,sample size(n)=32mean(μ)=3,200standard deviation(σ)=850