7.Find the value of k if f (x, y) = k(1- x)(1- y) for0 < x, y < 1 is to be joint density function.

Q: 2. A paint manufacturing company claims that the mean drying time for its paints is not longer than…

A: step.1  the null and alternative hypothesis ;- Claim to be tested is mean is no longer than 45 min.…

Q: ben and harry are friends who both enjoy fishing. One day they begin discussing the quantity of fish…

A: Given that, Ben and Harry are friends who both enjoy fishing. One day they begin discussing the…

Q: what fraction of the people say yes? what percent of people say yes?

A: Here given, you survey 50 people and 36 people say yes. X  = 36 n = 50

Q: Bob is a high school basketball player. He is a 70% free throw shooter. That means his probability…

A:

Q: hean amount paid by his firm for person- njury resulting from personal accidents 18,500. An actuary…

A: Given Xbar=19415 σ=2600 Level of significance=0.05 µ=18500

Q: You are conducting a test of independence for the claim that there is an association between the row…

A: The formula of chi - square test - statistic (χ2) is derived as below                χ2=∑Oi-Ei2Ei…

Q: Test whether there is a difference between two groups in the proportion who voted, if 45 out of a…

A: Assume that p1, p2 are the population proportions of who voted, in Group 1 and Group 2,…

Q: K In a large clinical trial, 395,956 children were randomly assigned to two groups. The treatment…

A: Formula used:  p = x/n

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A drug is…

A: Givensample size(n)=4658x=105Cofidence level=95%

Q: Suppose IQ scores were obtained for 20 randomly selected sets of twins. The20 pairs of measurements…

A: Given Alpha=0.05 X=97

Q: In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects were treated with…

A: given data, n=50x¯=3.2s=17.5CI=0.95α=1-0.95=0.05

Q: If n=21, (x-bar)=46, and s=3, construct a confidence interval at a 90% confidence level. Assume the…

A: given data sample size (n) = 21sample mean ( x¯ ) = 46sample standard deviatio (s) = 390% ci for…

Q: A simple random sample from a population with a normal distribution of 102 body temperatures has x =…

A: given data   sample size(n) = 102sample mean (x¯) = 98.40 sample standard deviation(s)…

Q: The letters of the word CASTIGATION is arranged in different ways randomly. What is the chance that…

A:

Q: Listed below are the overhead widths​ (in cm) of seals measured from photographs and the weights​…

A: Given: n = 6 α = 0.01 Formula Used: r = n∑XY-∑X∑Yn∑X2-∑X2n∑Y2-∑Y2

Q: Determine the probability that the child must wait between 2 and 3 minutes on the bus on a given…

A: we have to use exponential probability distribution with mean exponential probability distribution…

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: option A is correct graph According to given question,  We have:-   z1= 0.25 and z2 = 1.75To find…

Q: Some people are concerned that new tougher standards and high stakes tests adopted in many states…

A: Given tha ,  p = 10.9% = 0.109  X = 210 , N = 1782

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Solution-: Given: μ=269.5, σ=2.4. n=7 Let, X= The lengths of the steel rod ∴X→ N(μ=269.5,σ2=2.42) We…

Q: . Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact…

A: Compact Midsize Full-size 643 469 484 655 427 456 702 525 402   α=5% = 0.05

Q: The scatterplot below shows the relationship between two random variables X and Y. 9 5 4 3 2 0 8 O 2…

A: Dear student, According to Bartleby guidelines we can answer at most 3 subparts of a question at…

Q: A raffle costs $5 to play. You have 20% chance of winning $20, otherwise you lose.  What is the…

A: Given information: The percentage of winning $20 is 20%. P(winning)=20%=0.20 P(loosing)=1-0.2=0.8 A…

Q: population has parameters μ=239.2 and σ=93. You intend to draw a random sample of size n=48 What is…

A: Given that  n = 48 ,  μ=239.2 and σ=93

Q: A hypothesis test procedure uses a simple random sample to determine if an unknown population mean,…

A: given data n = 34x¯ = 4.81σ = 14H0 : μ= 0HA : μ≠0

Q: Now suppose we have only one sample x₁,...,n from the density: ƒ(x|t) = (2π)−¹/27¹/2−0.5x², x € (-∞,…

A: From the given information, fx|τ=2π-12τ12e-0.5τx2,  -∞≤x≤∞ Consider, the likelihood function,…

Q: K- Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: GIVEN DATA, normal distribution, μ=100σ=15the indicate IQ score for the given graph =?

Q: According to financial records, 24% of U.S. adults have more debt on their credit cards than they…

A: Solution : We have given that p = 0.24 n = 100

Q: he confidence interval 69.8% ± 3.2% in the form of a trilinear inequality. ____% < p < _____ %

A: GIVEN DATATHE CONFIDENCE INTERVAL IS 69.8% ±3.2% WE HAVE TO FIND OUT THE CONFIDENCE INTERVAL IN A…

Q: An experimenter flips a coin 100 times and gets 54 heads. Test the claim that the coin is fair…

A: given data claim : p = 0.5n =100x = 54p^ = xn = 54100 = 0.54

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: Solution : It is given that, The readings at freezing on a bundle of thermometers are normally…

Q: Let X be the amount of time (in hours) the wait is to get a table at a restaurant. Suppose the cdf…

A: P(X≥5/3)=?

Q: Citizens of a country were asked if they thought unemployment would increase, and 46% thought that…

A: Givensample size(n)=637x=268sample proportion(p^)=xn=268637≅0.4207significance level(α)=0.05

Q: The time needed for college students to complete a certain paper-and-pencil maze follows a Normal…

A: The given significance level is 1%.

Q: Example: In the Lotto 6/49 lottery, six numbers are drawn at random, without replacement, from the…

A:

Q: A hypothesis test procedure uses a simple random sample to compare an unknown population mean, μ, to…

A: GIvensample size(n)=23Mean(x)=76677standard deviation(σ)=12500The null and alternative hypothesis…

Q: Roll a die 3 times. Find the probability of getting at least one 6.

A:

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A:

Q: You are conducting a multinomial hypothesis test (a 0.05) for the claim that all 5 categories are…

A: Solution:  Given information: k=5 Categories  n=18+25+13+9+9= 74 Sample size

Q: Use the standard normal table to find the area to the left of z = -2.64. Click here to view page 1…

A: Denote the random variable Z has a standard normal distribution. Thus, Z~ N (µ=0, σ=1).

Q: The story in question 6 uses the concept of ????? A) poison probability distribution  B) bell…

A: The probability density function of a geometric random variable X is given as, P(X=x) = qx-1p ;…

Q: Twelve different video games showing substance use were observed and the duration of times of game…

A:

Q: 6. If X and Y are independent RVs with variances 8and 5.find the variance of 3X+4Y.

A: From the provided information, X and Y are independent RVs with variances 8 and 5. V (X) = 8 and V…

Q: Who Is More Trusting: Internet Users or Non-users? In a randomly selected sample of 2237 US adults,…

A:

Q: To compare the dry braking distances from 30 to 0 miles per hour for two makes of​ automobiles, a…

A: Solution: Given information: n1=35 Sample size model An2=35 Sample size model B x1= 41 Sample mean…

Q: A population has parameters μ=34.1 and σ=69.7 You intend to draw a random sample of size n=78 What…

A: Central limit theorem: As sample size increases, the sampling distribution of sample mean follows…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given that  Z follows standard normal distribution with mean zero and standard deviation one  Z ~…

Q: Find the regression equation, letting the first variable be the predictor (x) variable. Using the…

A: Given data Best Actress=29 29 29 60 30 34 43 28 64 22 45 51 Best actor=41 35 37 45 48 46 62 52 38 55…

Q: A simple random sample of 49 8th graders at a large suburban middle school indicated that 82% of…

A: It is given that a simple random sample of 49 students indicated that 82% of them are involved with…

Q: The probability density function of a continuous random variable is given by y=2x−4 from x=2 to x=3.…

A: Given that, the probability density function of a continuous random variable is given by y=2x−4 from…

Q: The manufacturer of a certain candy states that 13% of the candies are brown, 24% yellow, 14% red,…

A: by bartleby policy i can gives only 3 subparts at a time From given data we have : 13% brown 24%…