he pmf of a discrete random variable X is as follows: X -1 0 1 2 f(x) 1/10 2/10 5/10 2/10   Use this pmf to evaluate the following: mean of X variance of X

Q: QUESTION 27 A car insurance company wanted information about the age of its customers. From a sample…

A: given data sample size (n) = 143sample mean ( x¯ ) = 37sample standard deviatio (s) = 12.898% ci for…

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

A: Given data: Sample Mean = 43.6 Population standard deviation = 6.9 Sample size = 30 Population mean…

Q: Observations of a river that is subject to flooding have been carried out over a 100 year period.…

A:

Q: n AP stats class has 25 Senior and 5 Juniors. There are 22 total students in National Honor Society…

A: given data  An AP stats class has 25 Senior and 5 Juniors. There are 22 total students in National…

Q: Die A has four 9's and two 0's on its faces. Die B has four 3's and two 11's on its faces. When…

A: Given information: Die A has four 9's and two 0's on its faces. Die B has four 3's and two 11's on…

Q: A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the…

A: 2 red 3 green  2 blue  __________ 7 total balls   select two at random P(none of the ball is blue) =…

Q: QUESTION 28 Find the confidence level related to the critical value Za/2= -1.54. O 91.8% 99.5% 87.6%…

A: given data critical value Zα/2=-1.54confidence interval level is =?

Q: b) Find the mean and median if you throw out Alaska, which has the largest area by far. What does…

A: To calculate the median first we need to arrange the data set from smallest to largest.  Let n be…

Q: Which of the following factors affect(s) the width of the confidence interval? Sample size. Sample…

A: Confidence interval: CI=sample mean±t1-confidence level2, dfsample varaincesample size Here,…

Q: Current Attempt in Progress A consumer products company is formulating a new shampoo and is…

A: Given that

Q: A Japanese industry is considering on setting up plants in the Philippines. Define the following…

A: For any two events A and B, union of A and B, is the event of occurrence of either A or B or both.…

Q: In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to…

A:

Q: Espanol An intelligence test was recently administered to a group of 22 people. Their respective…

A:

Q: wider people often have a hard time finding work. AARP reported on the number of weeks it take ata…

A: Note: “Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: QUESTION 1 Find the z-score that marks the 5th percentile (denoted P5). That is, find the z-score…

A: given data  standard normal distribution  Z~N(0,1)  5th percentile = ?

Q: The test statistic of z = 2.14 is obtained when testing the claim that p *0.777. a. Identify the…

A: given data, test statistics z=2.14claim :p≠0.777α=0.05we have to find out  type of the hypotheisis,…

Q: Pearson correlation coefficient is calculated for 38 individuals. What value is df should be used to…

A: given data  pearson correlation coefficient n = 38 df = ?

Q: A standard deck of cards contains 52 cards. One card is selected from the deck. Compute the…

A: The question is about probability Introduction : Total no. of cards in a std. deck ( N ) = 52 Total…

Q: 55. If X is normally distributed RV with mean 12 and SD 4.Find P [X ≤ 20].

A:

Q: You wish to test the following claim (Ha) at a significance level of a = 0.002. Ho: p > p2 Ha: P₁ P2…

A: Suppose p1, p2 are the proportions of 1st and 2nd populations, respectively.

Q: (a) Identify the data set for which it is appropriate to use the Empirical Rule. It is appropriate…

A:

Q: The probability that a card drawn from a pack of 52 cards will be a diamond or a king, is.

A:

Q: 5.4. To establish whether RATE is indeed needed to predict the effectiveness of a treatment, a…

A: Given is the summary of logistic regression to predict the effectiveness of the treatment (Y) from…

Q: Here are the scores of 11 students on a science test. 65, 69, 69, 77, 79, 80, 81, 82, 85, 86, 93…

A:

Q: Oversampling should be done on the entire training dataset prior to cross validation True / False

A: The correct answer is  True.

Q: Suppose you are comparing seven groups in an ANOVA, and your result is significant. You want to…

A: Given information, Number of groups to be compared is 7. It is given that the ANOVA results are…

Q: Housing Price Prediction Model for D.M. Pan Real Estate Company

A: Given information: The output of simple linear regression is given.

Q: A company manager was told 35% of workers had COVID this year but the manager thought that was not…

A:

Q: If X is a Normal R.V with mean zero and variance o² Find the p.d.f of Y=e*.

A:

Q: Consider the following regression estimated using 84 observations Yt-P1 P2X21+P3X31+A4X41U Suppose…

A: Consider the multiple regression equation yt=β1+β2X2t+β3X3t+β4X4t+ut where β1, β2, β3, and β4 are…

Q: A waitress believes the distribution of her tips has a model that is slightly skewed to the right,…

A: given data  right skewed distribution  μ= 10.80σ = 5.40n = 50

Q: The table below compares how long high school seniors and college freshmen can hold their breath HS…

A:

Q: Suggest a reasonable value for the biasing constant c based on the VIF values and R² using the…

A: When the multiple regression model suffers from multicollinearity, the estimates of the regression…

Q: Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100…

A: It is given that the distribution of time taken follows normal distribution with mean 100 in and…

Q: e confidence interval for a population mean is (240.53, 240.79). What are the sample mean and the…

A: The confidence interval for a population mean is (240.53, 240.79)WE HAVE TO FIND OUT THE MEAN AND…

Q: ← A golf ball is selected at random from a golf bag. If the golf bag contains 7 type A balls, 4 type…

A: Data given Total ball =7(A)+4(B)+8(C) =19

Q: The following three independent random samples are obtained from three normally distributed…

A: Work study vs. Co-op: Given information: x¯1=13.1813, s1=0.6592,n1=15x¯2=15.0517, s2=1.6674,n2=24…

Q: A sample of values taken from a normally distributed population are 6.8, 7.2, 5.4, 8.8 and 10.2. If…

A: Given data is 6.8,7.2,5.4,8.8,10.2sample size(n)=5population standard deviation(σ)=2.1

Q: Test the claim that the mean GPA of night students is significantly different than the mean GPA of…

A:

Q: Let the sample space be S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10). Suppose the outcomes are equally…

A: Solution-: Given: Sample space =S={1,2,3,4,5,6,7,8,9,10} Let, Event E=An even number less than 7 We…

Q: Levi-Strauss Co manufactures clothing. The quality control department measures weekly values of…

A: Given the data of weekly values of different suppliers for the percentage difference of waste…

Q: Three unbiased the probability heads? coins are tossed. What is of getting at most two

A:

Q: Use the normal curve to find the indicated information for the given data. (You may find it helpful…

A: It is given that the distribution of life of batteries follows normal distribution with mean 328 in…

Q: Four undisturbed samples were taken from a stiff clay deposit. Un- drained triaxial tests on these…

A:

Q: A man and his wife appear in an interview for two vacancies in the same post. The probability of…

A: event A:wife selected           B:husband selected   P(A) = 1/5 P(B) = 1/7   independent events…

Q: A manager believes that the average worker spends 7.93 hours on the job with a standard deviation of…

A: given data σ = 0.79n = 35X¯ = 7.8293% ci for μ.

Q: A university conducted a survey of 387 undergraduate students regarding satisfaction with student…

A: given data, n=387 undergraduate students here data table is given we have to find out the…

Q: The following stem-and-leaf display shows the weight, in kilogram, boxes of juice…

A: Introduction: It is required to find the missing values and answer the questions related to the…

Q: Withdrawal symptoms may occur when a person using a painkiller suddenly stops using it. For a…

A: Given n=1100 P=0.01

Q: 7.38 Food intake and weight gain. If we increase our food intake, we generally gain weight.…

A: Given the data as Weight before Weight after 55.7 61.7 54.9 58.8 59.6 66 62.3 66.2 74.2…