L. The following table gives the distribution of a r.v. X ,nhere a and ß are constarnts, 20 2 P(X=x)| B 03 02 01 IFE(X)=0, then find E(3x²-5)

Q: (b) Define the backward difference Vp, (read nabla p,) by VP, = Pn- Pn-1· %3D

A: ∇pn is the first backward difference operator.

Q: a 33. Given the following data, find frequencies of () the remaining positive classes, and (i)…

A:

Q: 1. The following are final score grades. Fill in the frequencies: Score 3 1 3 4 55 3 4 3 4 3 4 2.…

A: Solution-: We have given data of 12 observations as below; 3,1,3,4,5,5,3,4,3,4,3,4 We fill the…

Q: 168. Correlation Let X and Y be jointly distributed with p(X,Y) = 1/2, o x = 2, and oy = 3. Find…

A: Given See the hand written solution

Q: Illustration 10.40. You are given the foilowing distributión of monthly income per family. Calculate…

A:

Q: What are the values of k for which K, x² dx = 0? -3 O 3 and -3 O -3, 0, and 3 O -3 - 3 O O

A: ∫-3kx2dx=0

Q: Use the following set of observed frequencies to test the independence of the two variables.…

A:

Q: Suppose a biologist collected data on the weight of 50 lab rats that were 3 weeks old. The boxplot…

A: We want to tell a skewness from box plot in given question

Q: Find the mean value of y = x + x° + x° over the range 0 < x < 2. Enter your answer as a decimal in…

A:

Q: Let p be the population proportion for the following condition. Find the point estimates for p and…

A: Solution Here we have given that X=2391, n = 4453 The point estimate for P  is  p^ = X/n  p^ =…

Q: The bone density scores are (Use a comma to separate answers as needed. Round to two decimal places…

A: Given  Mean =0 Standard deviation =1  Normally distributed  Find lowest 10% and highest 10% ?

Q: 57. Let p denote the proportion of all individuals who are allergic to a particular medication. An…

A: Given that p denotes the proportion of all individuals who are allergic to a particular medication.…

Q: the t-value in each of the cases. Click the icon to view the table of areas under the…

A:

Q: -2 b. fx(x) = {** x 21 else

A:

Q: The profits of a mobile company are normally distributed with Mean of R.O (D x 10) and standard…

A:

Q: need answer all the parts, incomplete answer will get down vote e: If 2u= 5x, is the relation beween…

A: Solution

Q: the following data related to size of shoes at a store during a Biven year. Find median and…

A:

Q: P(1.15 < Z < 2.77) =

A: X~N( 0 , 1 )   μ=0 , ?=1 (for standard normal distribution)   Z-score =( x - μ )/?

Q: if BF is a median, AF=2y+8 and CF=7y-2, find what AC =

A:

Q: For items 5 & 6: 5. If the area of the shaded part of the t-distribution below is 0.15, what is the…

A: If the area of the shaded part of the t-distribution below is 0.15, what is the area of the unshaded…

Q: 1 and x = 3 1 3 Find the mean value of y = between x = - +3 2 — х — Зх2

A: We have to find the mean value of y

Q: If: y = ax² + bx³ where a = 13 and b = 5, find the mean value of y for X between 1 and 3

A: Given :y=ax2+bx3a=13 and b=5

Q: Find the values of t that bound the middle 0.8 of the distribution for df = 29. (Give your answers…

A: The degrees of freedom is 29. The confidence level(middle value) is 0.80 then the significance level…

Q: A. Assuming n = 30, find the t scores that enclose: the middlemost 90% of the area under the curve…

A: To find t scores forA )The n=30 when,the middlemost 90% of the area under the curvethe middlemost…

Q: In the 1940s, the U.S. Department of Commerce reported a new way to test the tensile strongth, in…

A: Margin of error of second study will likely to be less than 10 pounds per square inch A margin of…

Q: The data below shows the maximum temperature(°c) and the number of bowls of soup sold at God's Grace…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: "The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the…

A: Solution-: Given: Sample size (n) =250,μ0=30,c=0.99 What rejection should be use?

Q: 5. The mean and variance of a Binomial variable X are 4 respectively 4 and Find P(X ≥ 3).

A: The question is about binomial distribution.Given :Mean = E(X) = 4.Variance = V(X) =4/5.

Q: 4.3.15 Generate i.i.d. X1, X2, ..., X, distributed N(-4, 3) with n large (take n = 10° if possible).…

A: Consider the given information:Consider the i.i.d variables X1, X2, X3 distributed with mean -4…

Q: solve for t.

A: here given ,  A group of faculty members at a local university agreed that the average annual salary…

Q: . 6.9. If 2x; + 3y, = 5; i 1, 2, ..., n and mean deviation of x1, x, . x about their mean is 12,…

A: Measures of Dispersion: The word dispersion is used to denote the degree of heterogeneity in the…

Q: For the following frequency distribution, what is ΣX? How to do the steps?X f30-34…

A: Solution: We are given the following data: Xf30-34125-29120-24315-19210-141

Q: Use the following set of observed frequencies to test the independence of the two variables.…

A: From the information, given thatThe formula of the expected frequency is,

Q: Which of the following is the closest estimate of r for the following scatterplot? a. .4    b. 0…

A: Introduction The scatterplot is a graphical representation of the relationship b/w the 2 variables.