List at least two possible confounding variables for the following association. Countries which have a larger proportion of citizens who own personal computers and/or laptops tend to also have a larger proportion of citizens who are overweight.

Q: Pass the ball: The following table lists the heights (inches) and weights (pounds) of 8 National…

A: By using excel regression  Excel> data>data analysis > regression > input data >…

Q: Show that an irreducible Markov chain with a finite state space and transition matrix P is…

A:

Q: According to a leasing firm's reports, the mean number of miles driven annually in its leased cars…

A: Givenstandard deviation(σ)=1040sample size(n)=70Mean(x)=12635significance level(α)=0.05

Q: Find the n-step transition probabilities pij (n) for the chain X having transition matrix P= 0 1/3…

A:

Q: What is 10% of 21

A: The bill amount comes to $21 plus 10% tax.

Q: In a random sample of 200 students at a university, 160 stated that they were nonsmokers. Based on…

A: given data, n=200x= no. of smokers =160p^=xn=160200=0.80CI=0.95α=1-0.95=0.05

Q: Test Engineers found that 22% of steel frames fracture within 15 years. The average stress that…

A: It is given that the average stress that the frames an withstand is 30 psi.

Q: Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which…

A:

Q: a) Consider an ARMA(1,1) process given by x₁ = 0.5x₁_₁+z₁ − 0.3z₁_1 Find the first four weights.

A: Hello! As you have posted 3 different questions, we are answering the first question. In case you…

Q: events {owns an iPhone} and {owns a laptop} independent? 11. The probability Keydaliz will get an A…

A:

Q: Private nonprofit four-year colleges charge, on average, $27,449 per year in tuition and fees. The…

A: given data  μ = 27449σ = 7255 normal distribution

Q: 49. Cars arrive at the beginning of a long road in a Poisson stream of rate from time t = 0 onwards.…

A:

Q: A random sample of n1n1 = 228 people who live in a city were selected and 85 identified as a…

A: Given n1=228 n2=101 X1=85 X1=54

Q: A college preparation academy claims that their 3-hour crash course may have an effect on students'…

A: The given claim is that there is sufficient evidence that the mean practice SAT score after the…

Q: Single Mean against a Reference – Null Hypothesis is that the Population Mean Equals 47.2, Alternate…

A:

Q: find the T value such that the area left of the T value is .025 with 15° of freedom

A: The area of the T value is 0.025.

Q: Retinitis pigmentosa (RP) is a hereditary ocular disease in which patches of pigment appear on the…

A: Let X represents time and Y represents ln (visual field area).

Q: Question content area top Part 1 Assume that two fair dice are rolled. First compute​ P(F) and then​…

A: Given that, two dice are rolled. So that, sample space,…

Q: For each data set, find the measures of central tendency (mean, median, and mode), measures of…

A: Solution-: Given data sets: Data set 1: 18, 15, 21, 16, 15, 14, 15, 21 Data set 2: 22, 35, 28, 29,…

Q: The p-value for a hypothesis test turns out to be 0.01251. At a 2% level of significance, what is…

A: The p-value for a hypothesis test is 0.01251.

Q: Q. 4 What are the properties of a good measure of central tendency?

A:

Q: A bag of 100 tulip bulbs purchased from a nursery contains 25 red tulip bulbs, 40 yellow tulip…

A: Answer: From the given data, Number of tulip bulbs in the bag = 100 Number of red tulip bulbs = 25…

Q: Shown below are four confidence intervals created from the same sample data. Which of these…

A: we have to find which confidence interval has highest level of confidence? (a) 156<μ<160(b)…

Q: The lifetime (years) of a television power adapter can be considered to follow a Weibull…

A: We have given that parameter for weibull distribution a = 15.0 and  b = 1.59

Q: Many students brag that they have more than 150 friends on a social media platform. For a class…

A: Given that  Number of friends X:  250,255,230,185,250,95,120,20,260,95, 160,40,175  We have to…

Q: We can use simulation to examine the fate of populations of living creatures. Consider the Asian…

A: Introduction: It is required to choose the correct option regarding assigning digits for the…

Q: Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to…

A: Given data, standard normal distribution X~N(0,1)we have to find out the value of c for the given…

Q: ssing 2 more questions

A: here we have to use Empirical rule  68% of the values are contained in μ-σ to μ+σ 95% of the values…

Q: A box office analyst seeks to predict opening weekend box office gross for movies. Toward this​…

A: The​ least-squares regression equation for these data is, Yi=−0.914+1.408Xi

Q: * (*) don giving counter Examples, we will take Example. of binomial distribution. 94 X ~ binomial…

A: For giving counter example, we’ll take an example of binomial distribution,  If X~ Binomial(n,p)…

Q: Find the T value such that the area in the right tail is .15 with 8° of freedom

A: Given that Significance level (α)= 0.15 Degree of freedom (df) = 8 Type of tail = right tailed

Q: Consider the following data of the number of hours 12 students spent online during the weekend and…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed…

A: Solution-: Given: μ=19, σ=5 Let, X= be the number of days for a randomly selected trial. We want to…

Q: The "Freshman 15" refers to the belief that college students gain 15 lb (or 6.8 kg) during their…

A: Null hypothesis: H0: μd = 0. Alternative hypothesis: H1:  μd >0. Paired t-test statistic: In…

Q: A toy manufacturer wants to see how long, on average, a new toy captures children's attention. He…

A: given data, n=16X¯=27S=8normal distribution, CI=0.90α=1-0.90=0.10

Q: Question 22 Which of the statements is correct as shown in the figure below? When y increases, x…

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Q: These are the bullet points relating to the following question: You are studying a different…

A: Given, μ=6 mm and α=0.05 (significance level). From the collected sample of fruit flies, X¯=5.8 mm,…

Q: Test the hypothesis that σ₁ <0₂ at the a= 0.05 level of significance for the given sample data.…

A: We’ve to test,  H0: σ1&gt;=σ2 H1: σ1&lt;σ2

Q: If P (Z ≤ z) = 0.25. What is the P(-zs Zs z) is

A: From given data we have  P(Z≤z)=0.25

Q: Example 10 A die is thrown. If E is the event the number appearing is a multiple of 3' and F be the…

A:

Q: find the t value such that the area in the right tail is .02 with 12° of freedom

A: Given Area in right tail =0.02 Degree of freedom=12

Q: When using population size as the explanatory variable, x, and broadband subscribers as the response…

A: We have given the following regression equation  ŷ = 4975098 + 0.0342X

Q: From previous studies, it is concluded that 60% of people support legalizing gay marriage. A…

A:

Q: 1. Let X be a rs from normal distribution N(0, 1). Determine whether the Q below are valid pivots.…

A: Given:-               Q1 = n x¯-θ Let x be a  rs from normal distribution N θ,1.

Q: Define the term statistic.

A:

Q: Suppose the mean of X is 16. What is the mean of Y if Y=1.27*X? (Use two decimal places, ex: 12.34)

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Q: Consider the time series process given by x₁ = Z₁ + 0₁ Z-2 where ~WN 0,1 and 6₁ = -0.8. A. Find the…

A: Given the time series process : xt=zt+θ1zt-2  where zt~WN0,1  and  θ1=-0.8

Q: Deduction of the binomial distribution.

A: We have find  Deduction of the binomial distribution

Q: A manager at a local discount gym believes that less than 20% of gym members use the gym, at least 5…

A: From given data we have : sample success x = 15 sample size n=100 so, p^=xn=15100=1.5

Q: The test statistic, t, is (Round to two decimal places as needed.) The P-value is (Round to three…

A: