As chocolate consumption increases, happiness increases. But only up to a point! When you eat too much, the opposite pattern emerges. What weakness of correlation does this illustrate? 1)Correlation is only for curvilinear relationships. 2)Correlation implies causation 3)Correlation is only for linear relationships 4)Correlation does not imply causation

Q: Find the value of Za 20.12 20.12 = (Round to two decimal places as needed.) ***

A: given data standard normal distributionZ~N(0,1)we have to find value of Z0.12

Q: .If X&Y are independent R.V's,what are the values of Var(X₁+X₂)and Var(X₁-X₂)

A:

Q: How did you get 0.15088 from -0.3877?

A: From the given information, the mean is 313.

Q: If var(X) = var(Y) = σ², cov(X,Y)= and 2Y-3 find the correlation between 2X+3

A:

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A: The data shows best actress and best actors winner.

Q: What is the total degree of freedom for the test?       A. 18       B. 17       C. 16       D. 15

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A: Given  Sample size n=18, sample mean x̄=12.4, sample standard deviations s=0.76, level of…

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A: For Sample 1:

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A: Given information: The statement is given related to the effect of an increase in confidence level…

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A: As per our guidelines we are supposed to answer only 3 sub-parts of any questions so i am solving…

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A: a)   The population mean is μ.

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A: The slope of a regression line interprets the change in the dependent variable for a unit change in…

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A: From given data we have ; Location of Injury Probability  Frequency Multiple  0.570 1021 Head…

Q: A simple random sample of size n is drawn. The sample mean, x, is found to be 18.6, and the sample…

A: GivenMean(x)=18.6standard deviation(s)=4.3

Q: Listed in the accompanying table are weights (kg) of randomly selected U.S. Army male personnel…

A:

Q: Q3 provide example for each data types. coz aut tw 1) Nominal 2) ordinal 3) Interval 4) Ratio .

A: Interval data type:  It is measured along a scale. In this data type every point is placed at the…

Q: You have a charge card. You receive a bill, dated June 5.  Your balance fluctuated during the 31-day…

A: Formula Used: Average = ∑FX∑F

Q: The top portion of the Pearson's r correlation coefficient equation calculates the______ whereas the…

A: Method: Correlation coefficient shows that the relationship between the two variables X and Y.

Q: The Environmental Protection Agency, EPA in 2016, issued guidelines stating that Perfluorooctanoic…

A: From the provided information, Sample size (n) = 49 Sample mean (x̄) = 592 Sample standard deviation…

Q: Carbonated Beverage: The fill volume of an automated filling machine used for filling bottles of…

A: Formula used: For z value            Z = (x - mu)/sigma

Q: Test the claim that the mean GPA of night students is smaller than 3.3 at the 0.10 significance…

A: given data, claim:μ<3.3α=0.10we have to complete the hypothesis testing for the given data

Q: 7. Assume there are 3,600 cases in the validation dataset, and 12% of these cases have a value of 1…

A:

Q: Assume the random variable x is normally distributed with mean μ = 50 and standard deviation o = 7.…

A:

Q: If X and Y are independent random variable find covariance between X+Y and X-Y. Answer:

A: Given that X and Y are independent random variables. We need to find covariance between X+Y and X-Y

Q: You happen to be stranded on a cruise ship that is foundered and is taking on water and zombies.…

A: Method: hypothesis testing,  Reject the null hypothesis

Q: Regression Model – In a simple linear regression, the standard model takes the form of Y ≈ β0 + β1X…

A:

Q: The relationship between the number of games won by an NHL team and the average attendance at their…

A: The following information has been provided: The regression model is : attendance^=-2600+225 wins.…

Q: Scenario: Researchers were interested in how social situations can influence stress-induced eating.…

A: Given scenario consists ofTwo factors1. Eating habits.2. Social situations.

Q: Two independent random variables X and Y have 36 and 16.Find the correlation co-efficient between…

A:

Q: Define OLS and what it is. Why do we use OLS for linear regressions? What are limitations of using…

A: Ordinary Least Squares: The ordinary least squares (OLS) method can be defined as a linear…

Q: 46.The joint p.d.f of (X,Y) is given by f (x, y) = e-(x+y) 0 ≤ x, y ≤ 00 .Are X and Y are…

A:

Q: Benford’s Law is an observation about the leading digits of the numbers found in real-world data…

A:

Q: (d) Compute the standard deviation of the random variable X. 0x = hits (Round to three decimal…

A: Let's solve for the question numbered d, e and f as all the questions before them are answered…

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: A travel agent is interested in the average price of a hotel room during the summer in a resort…

A: The question is about confidence interval Given : Randomly selected no. of hotels ( n ) = 20 Sample…

Q: A waiter believes the distribution of his tips has a model that is slightly skewed to the left, with…

A: given data slightly left skewed distribution μ = 8.30σ = 5.90n = 50 heren>30; as per clt sampling…

Q: d) P(Patient had pain or in the control group) = =

A: treatment control total pain 10 2 12 no pain 35 43 78 total 45 45 90

Q: The overhead reach distances of adult females are normally distributed with a mean of 197.5 cm and a…

A: given data  normal distribution  μ = 197.5σ = 8.3

Q: type are equal. k here to view the data Corn Plan

A: For Sludge Plot: sample size (n1) = 6 sample mean (x̄1) = Σx1 /n1 = 169/6 = 28.17 sample variance…

Q: Why does a correlation table have a diagonal line of 1s? 1 Because the sum of all correlation…

A: Why does correlation table have a diagonal line' of 1's??

Q: cording to a recent survey, the probability that the driver in a fatal vehicle accident is female…

A: GIVEN DATA event A  : river 24 years old or lessevent F : driver in a fatal accident is femaleP(F) =…

Q: Suppose that we check for clarity in 50 locations in Lake Tahoe and discover that the average depth…

A: From the provided information, Sample size (n) = 50 Sample mean (x̄) = 14 Sample standard deviation…

Q: A simple random sample of 60 items from a population with a = 5 resulted in a sample mean of 33. (a)…

A: Solution-: Given: x¯=33,n=60,σ=5 We want to find, (a) A 90% C.I. for the population mean. (b) A 95%…

Q: Put these data into a 2x2 contingency table.

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Which of the following would be a good dummy variable?  (Select all that apply.) 1   None of these…

A: Dummy variable is used to decode the categorical data. Dummy variables are coded as 0 or 1.

Q: If I change the alpha level from 0.05 to 0.01     The probability of a Type 1 error goes down…

A: Solution-: If I change the alpha level from 0.05 to 0.01 (a)The probability of a type -1 error goes…

Q: Problem 1. The Cook's distance is defined as Please show that Di = (Y - Y,))(Y −Y)) (p+1) MSE Di -…

A: Given the Cook's distance is defined as Di=Y^-Y^i'Y^-Y^ip+1MSE

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: We have given that  P(Z< z) = 0.8365

Q: According to a recent survey, 52% of UAE residents are considering a switch to hybrid or electric…

A: Given: P = 0.52 n = 250 X = 145 α = 1% = 0.01 Formula Used: Test-statistic Z = p-PP(1-P)n

Q: Public Housing Authority in a certain community conducted a survey of 1000 families to determine the…

A: Suppose a random experiment E is repeated n times under same essential conditions and an even A,…