Suppose a > 0, gcd(a, 42) = 6 and lcm(a, 42) = 420. Find a. %3D (а) 10 (b) 50 (c) 12 (d) 60 O b b O a

Q: Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of…

A: Given data and calculation is shown below x y x2 y2 xy 29 30 841 900 870 44 19 1936 361 836…

Q: A sample of n =16 scores produces a t statistic of t = 2.00. If the sample is used to measure effect…

A: Given Information: Sample size (n) = 16 t-statistic (t) = 2.00 To obtain the value of r2:   The…

Q: What is the relationship between Za and Zb? A E a В

A: Vertical angles: the angles should be formed by two intersecting lines and both should be opposite.…

Q: A factory has reported that 81%of their mechanical keyboards remain in a consumer's household over a…

A: Let's find.

Q: Suppose that X ~ Pareto(y). Define Y = In(X+1). If E[X] = , then what is the variance of Y? %3D %3D

A: For X~Pareto(γ), if x∈(0,∞) then the probability distribution function(pdf) of X is given by…

Q: If E(x; – X)² fi = 600 and E f; = 30 , The variance value is equal to %3D

A: The variance is calculated by  Variance= (1/N) sigma fi(xi - X)^2

Q: Find the z-score if the area to the right of z is .3523 and area to the left of –z is 0.3342.

A: Standard normal score: The standard normal score follows a normal distribution with mean 0 and…

Q: Loky wanted to test if there is association between vitamin exposure and having cardiovascular…

A:

Q: For the optimization of the likelihood function, the computation of the log-likelihood L(8; y) = log…

A: In maximum likelihood estimation we maximize the likelihood function with respect to  the parameters…

Q: 1 If z = xy', find the percentage error in z when x = 3.14 ± 0.0016 and 8 y = 4.5 ± 0.05.

A: The percentage error in z is defined as ∆zz×100.  It is provided that ∆x=0.0016 , ∆y=0.05 and…

Q: b) Given the following data in table below: f(x) 9.367879 8.233241 7.180350 6.209329 -3.0 -2.8 -2.6…

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Q: 9t 12. Can vaccination be regarded as preventive measure for smallpox, from the data given below?…

A:

Q: A healthy subjects receives an infusion of 2L of isotonic saline. Assuming no urine excretion, which…

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Q: The coefficient of correlation between X and Y is and of = a, ož = 4a, and o; = 114 where Z = 3X –…

A: Given that Z=3X-4YSo,…

Q: A fire insurance company wants to relate the amount of fire damage in r fires to the distance…

A: Regression Equation = ŷ = bX + a

Q: proportion infected with leeches control treatment 0.726 0.342 0.381 0.37 0.284 0.083 0.335 0.082…

A: control treatment 0.726 0.342 0.381 0.37 0.284 0.083 0.335 0.082 0.895 0.218 0.562 0.16…

Q: he following using p I below freezing and ner snowing or belov

A: Reasoning: p:It is below freezing.q:It is snowing.~p:It is not below freezing.~q:It is not snowing.

Q: From the result above, it can be said that the expected yearly income of a. males is $10,263 more…

A: Answer: From the given output, It can be said that the expected yearly income of males is $10,263…

Q: A sample of n = 16 scores produces a t statistic of t = 2.00. If the sample is used to measure…

A: Given, n=16 t=2.00 The degrees of freedom is obtained as- df=n-1=16-1=15

Q: For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

A: From the given information,   Mean = 84 Standard deviation = 4   The objective is to find the…

Q: For a research study with 2 levels of factor A, 4 levels of factor B, and n = 8 in each treatment…

A: For a research study with 2 levels of factor A, 4 levels of factor B, and n = 8 in each treatment…

Q: Consider a dice with the property that the probability of a face with n dots showing up is…

A: Introduction : Given , A dice , prob.(a face with n dots showing up) is proportional to n.hence, we…

Q: 1 If z = 8 -xy, find the percentage error in z when x = 3.14 + 0.0016 and y = 4.5 + 0.05.

A: Calculate percentage error: ∆zz=∆xx+3∆yy        =0.00163.14+30.054.5        =79723550        =0.0338…

Q: What is the symbol for the residual? R? None of the above / does not have a symbol

A: In the given problem, We need to write the symbol for residual.

Q: In one of his Subsidiaries, sheltron, gasoline is stocked in a bulk tank each week. Let x denote the…

A: Given that  X: proportion of tank's capacity stocked per week Y: proportion of tank's capacity sold…

Q: Two samples, one each from two batches of a product, were analyzed for trace iron content by the…

A: Given, α = 0.05 Two batches of product having specific iron content as given in table    Batch A…

Q: The data below are the temperatures on randomly chosen days during a summer class and the number of…

A:

Q: e weights of radish seeds are normally distributed, with µ = 0.12 g and σ = 0.02 g.     What is the…

A: Z score is the score used to measure by how many units the value of a raw score is above or below…

Q: The Department of Health wishes to determine the percentage, p, of the general population who are…

A: Given : The test for Cooties is known to be 99% accurate given that a patient is infected and 90%…

Q: A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27…

A: We want to find the Zcritical

Q: To calculate the residual, you would take   a. yi − ŷ b. ŷ − yi c. xi − ŷ d. xi − x

A: We have given that,  To calculate the residual, you would take a. yi − ŷ b. ŷ − yi c. xi − ŷ d. xi −…

Q: a one way factor anova produces ss between =120, ss within = 30 , and df = 2, 15. For this analysis,…

A:

Q: Given that the residual for each observation () is H; > 0, this means that Select one: O a.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Show that their covariance is Cry=a o where oy is the variance of X

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Q: 2,222 dollars. Test the hypothesis that the true value of property lost in burglaries is more than…

A: The provided sample mean is Xˉ=2222\bar X = 2222 and the known population standard deviation is…

Q: People having Raynauds syndrome are apt to suffer a sudden impairment of blood circulation in…

A: Given : m =12 ,  n = 12         Test the hypothesis at  α = 0.01 , H0: µ1 − µ2 = 0 versus Ha: µ1 −…

Q: Is a value of r=0.75 from a sample of 100 more significant than a value of r=0.30 from a sample of…

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Q: The electric car company also wants to control the quality of the current battery manufacturing…

A: Given information: The data represents the values of the variables Lithium-ion and Lead-acid.

Q: Since the z-score in freestyle is [ Select ] O than the z- score in backstroke, his time in…

A:

Q: A population with a mean of μ = 8 has SX = 40. How many scores are in the population?

A: It is given that, the population mean is µ = 6 and ΣX = 40.

Q: What size samples do you need for a 2-group design if you expect to have an effect size of .50 and…

A: Type of experiment: 2-group design (2 samples independent test) Designated Power: 0.71 Effect size:…

Q: d) Theth percentile corresponds to this score, which means that 299 is (Round to five decimal places…

A: Now finding the answer for (d) Given that the best score is 299 now we have to find percentile…

Q: %3D A population of N= 5 scores has EX= 20 and EX² = 100. For this population, what is the value of…

A: Given information- Population size, N = 5 ⅀X = 20 ⅀X2 = 100 We have to find the sum of squares (SS)

Q: X has PDF f(x) = #/2 if0<x <2 0 otherwise What is the 17th percentile?

A:

Q: Imagine a family member looks over your shoulder as you look at the variance equation Σki=1(xi −…

A: sigma^2   = ∑ (x −  μ)2 / n

Q: The covariance of two perfectly correlated variables X and Y is 96. Determine ox and Oy if it is…

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Q: A researcher conducts a hypothesis test using a sample from an unknown population. If the t…

A: A researcher conducts a hypothesis test using a sample from an unknown population.  Degrees of…

Q: 1.Derive M(t), E(X), and Var(X) for Exponential Distribution.

A: As per our guidelines we are supposed to answer only one question per post so I am solving question…

Q: . oc 22.9. Show that if A occurs in a larger proportion of cases where B is than where B is not, hen…

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Q: at the variance of the treatment effect is o?. otain an expression for E [(ỹ1. – 72.)²] in terms of…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.