find 1- FIND E (X) 2- FIND THE VARIANCE

Q: Dustin buys a bag of cookies that contains 7 chocolate chip cookies, 6 peanut butter cookies, 8…

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Q: Here is the recommended dosage chart for milliliters of Ibuprofen, a medicine for pain and fever…

A: The data shows weight and dosage.

Q: The table shows the world population (in billions) for six different years. (Source: U.S. Census…

A: Given Information: The value of x for 1985 is 5. The least square regression quadratic polynomial…

Q: Research show that gasoline use for vehicles is normally distributed, with a mean of 25.5 miles per…

A: Given : Research show that gasoline use for vehicles is normally distributed, with a mean of 25.5…

Q: The NSW Health department was interested in obtaining opinions from adults aged 18-25 living in…

A: A sample is said to be random, when the members of the sample are randomly selected from the…

Q: A sample of male and female students were equipped with a device that records sound for one day.…

A: given data malesx¯1  = 16177s1 = 7520n1 = 56femalex¯2  =16569s2 = 9108n2 = 5699% ci for μ1-μ2unequal…

Q: It was revealed that in New York 8% of all automobiles in the state did not pass inspection. Of the…

A: 1. Suppose a random variable X, defines that the number of automobiles in the state that did not…

Q: Every year, the students at a school are given a musical aptitude test that rates them from 0 (no…

A: x f 0 4 1 1 2 1 3 4 4 4 5 1   n = 15

Q: A marketer claims that 54% of tourists prefer beach holidays and we want to test that claim at the…

A: From the provided information, Sample size (n) = 80 From which 39 prefer the beach. Sample…

Q: The need to validate the result of any research study is to make sure the groups or participants are…

A: Given::- The need to validate the result of any research study is to make sure the groups or…

Q: Environmental Health An important issue in assessing nuclear energy is whether excess disease risks…

A: Given information: A study was undertaken for a large sample of the community surrounding the…

Q: Consider the following image of the data. Is the linear trend line a reasonable fit to the data…

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Q: We can use lenght of a man's hand span to predict his height, with correlation coefficient of r =…

A: Given that We can use lenght of a man's hand span to predict his height with correlation coefficient…

Q: How do you find the expected value of a random variable

A: A random variable is a variable that takes numerical values for each outcome of an experiment.  A…

Q: Given a normally distributed variable x with mean 18 and standard deviation 2.5, what is the value…

A: From the provided information, Mean (µ) = 18 Standard deviation (σ) = 2.5 X~N (18, 2.5)

Q: HELM (2008): Workbook 37: Discrete Probability Distributions HELME Exercises continued 10. A factory…

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Q: The Bureau of Labor Statistics reported that the average yearly income of doctors in the year 2017…

A: Given that: Population mean, μ=115000 Population standard deviation, σ=30000 Sample size, n=300…

Q: If X and Y are independent random variables with E(X) = 2, E(Y) = 2, Var(X) = 3, and Var(Y) = 1,…

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Q: The time required for an automotive center to complete an oil change service on an automobile…

A: Given Information: Mean, μ=17 Standard deviation, σ=4

Q: You may need to use the appropriate technology to answer this question. What is the probability of…

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Q: was done on 26 students, and the distribution of total study hours per week is bell-shaped with a…

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Q: What value would you project for a share of stock at the beginning of year 3? $

A: From the model of Gordon's growth the formula is given as: P = [ D (1+g) ] ÷ ( ke -g). P = current…

Q: Here is the recommended dosage chart for milliliters of Ibuprofen, a medicine for pain and fever…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: arge scale industry manufacturers unique items for sale in the local market. The sales manager…

A: For the different natures of products, the following information about the sales (in M) is…

Q: further elaborate the regression model, researchers of the research project identified that the…

A: Hi! Thank you for the question. As per the honor code, we are allowed to answer three sub-parts at a…

Q: Regression analysis was applied between sales data (y in $1000s) and advertising data (x in $100s)…

A: The question is about regression Given : n = 17 sb1 = 0.2683 Regression eq. : y^ = 12 + 1.8 x   To…

Q: Here is a set of sample data 5 13 14 18 19 22 24 25 26 28 34 35 44 55 56 60 67 68 72 84 86 95 100…

A: Given: Sample of data (n)=23 ordered data 5 13 14 18 19 22 24 25 26 28 34…

Q: Out of 100 people sampled, 40 had kids. Based on this, construct a 99% confidence interval for the…

A: From given data we have : x=40 n=100 thus, p^=xn  =40100  =0.4

Q: For Numbers 24 to 26: Three veterinary x-ray equipment (A, B, and C) are being tested for efficiency…

A: Note: As only Q25 is completely visible in the image, the answer has been provided for the same.…

Q: After doing AVONA on the SPSS I got result of sig. 0.165. What does that say about my data and…

A: Given The result of doing ANOVA on the SPSS is obtained and the sig. is 0.165.

Q: Can you use these results and Theorem 12.2 (see image) to test the null hypothesis that ? = 150…

A: Given information: From the given theorem,  K follows Chi-square distribution with 1 degrees of…

Q: we want to check the accuracy of self-reported diagnoses of angina by getting further medical…

A: Number of ways of selection of cases = nPr  where n=40 and r=4…

Q: Derive the marginal pdf of X Derive the conditional pdf of XaXx, and calculate EXX) Please Calculate…

A: Let X1, and X2 has joint pdf, fX1,X2(x1,x2)  = 1 , 0<x1,x2<1                         = 0,…

Q: For a disability insurance claim: (i) The claimant will receive payments at the rate of 20,000 per…

A: Given::- For a disability insurance claim: (i) The claimant will receive payments at the rate of…

Q: Dr. Anakin Goldblum has created a 50-item questionnaire which supposedly measures people's levels of…

A: Regression analysis is used to predict the variable based on the another. It measure the…

Q: Give the boundaries of the indicated value. 2 quarts

A: The question is about boundaries Introduction : Boundaries : Boundaries are the interval within…

Q: If X∼ Normal(5,25), then P(X=5)=__

A: given data normal distribution X~N(5,25) P(x=5) = ?

Q: In a bag of 340 chocolate candies, 35 of them are brown. The candy company claims that 13% of its…

A: Given:-               n = 340               p = 0.13               x = 35

Q: A pharmaceutical company wishes to set a maximum efficacy guarantee on its drug for covid-19. Lab…

A: From given data we have : mean μ=67900 Standard deviation σ=2050

Q: (a) The 9 members of the swim team completed the following numbers of laps at today's practice: 76,…

A: Solution:  When the data is in numerical form the best measure of central tendency is mean. Because…

Q: There are 13 lakes in the park. Each lake is connected to other lakes by at least 3 canals. What is…

A: Given The total number of lakes in the park =13 Each lake is connected to other lakes by at least 3…

Q: n1=473p^1=0.52n2=522p^2=0.45 d) Find a 95% confidence interval for the difference in the…

A: Given that From the provided information,   n1=473 p1^=0.52 n2=522 p2^=0.45 We have to find d...…

Q: What relationship exists between the two variables?    Student Midterm (x) Finals (y) x2 y2…

A: From the provided information, the following values are obtained: ∑x=775,  ∑y=815,  ∑x2=60925,…

Q: How many of the surveyed customers know about the computers because of EXACTLY ONE of these forms of…

A:

Q: 23. Suppose (X1,..., Xn} are random variables on the probability space (S, B, P) such that P[…

A: Rn :(Ω,B(Ω))→(Ω′,B′) where Ω′ ={1,...,n}∪{17} and B′ =B(Ω′)

Q: is approximately normally distributed with mean 42.5 inches and standard deviation 6 inches. Round…

A: Given that.   X~N( μ , ?)   μ=42.5     , ?=6   Z-score =( x - μ )/?

Q: 1. If X is a discrete random variable and 0 is not a mass point, then P(X=0)=0. A. True B. False 2.…

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted  1. If…

Q: 24. The treatments and experimental units in the study are A. x-ray equipment, dogs B. x-ray…

A: Given information: In the given study, there are three veterinary x-ray equipment (A, B, C) tested…

Q: ppose that the results of a survey show that 38% of people consider summer as their favorite season.…

A: Given, Suppose that the results of a survey show that 38% of people consider summer as their…

Q: With t test statistics and its p-value, given in the regression output, we test:

A: