An economist is studying the effect of education on salary and conducts a survey of 150 randomly selected workers from each of these categories: less than a high-school degree; high-school degree; more than a high-school degree. The sampling technique being employed

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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Exhibit 9-31 n = 64 x=64.8 a = 24 Refer to Exhibit 9-31. The p-value is equal to .2302 0.0548 .2698…

A: Given  Hypothesis Ho: μ=60 H1: μ≠60 n=64, sample mean x̄=64.8, standard deviations σ=24

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Q: Suppose that P(A) = 0.5 , P(B) = 0.8, and P(B / A) = 0.7. Find: (a)P (A and B) (b) P (A or B )

A: given data   P(A) = 0.5  P(B) = 0.8  P(B | A) = 0.7

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Q: (a) P(A^ B') = P(A) – P(A^ B) (b) P(AUB) = 1 - P(A'n B')

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Q: Can we use the Normal distribution to calculate probabilities for the weekly income of an individual…

A: From the Histogram, Data is right skewed There is no symmetry Low income - more students High income…

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Q: Question No: 08 209c04670 s is a subjective question, hence you have to write your answer in the…

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Q: what is the standard deviation

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Q: find the mean of the Variable X.. find the Standard deviation.

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Q: Suppose X has a hypergeometric distribution with N = 100, n = 4, and K = 20. Determine the…

A: given data  N = 100 n = 4 K = 20 we have to find given probabilities. P(x=X) = kxN-kn-xNn

Q: Question: When doing a hypothesis test, we find a p-value of 0.02 with a significance level of a =…

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Q: 4. If X~ N3 (μ, E) where µ¹ = [2-3 1] and Σ = 1 3 2 | 1 2 2 then find the distribution of 3X1-2X2 +…

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Q: The manufacturing of semiconductor chips produces 2% defective chips. Assume the chips are…

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Q: Use normal approximation. Round the answers to four decimal places (e.g. 98.7654). (a) Approximate…

A: It is given that  p = 19.3% = 0.193 n = 1000

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Q: Consider the linear regression In(y) = ₁ + 3₂ ln(x2) + 33 ln(x3) + e. The restriction that 3₂ = 33/3…

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Q: uld you please check

A: Wait time in minutes     40 46 49 44 45 45 38 51 42 46 41 45 49 41 48 42 49 40 42 43 43…

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Q: A sample of 80 observations will be taken from a process (an infinite population). The population…

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Q: 6.47 6.13 6.19 4.89 5.63 4.52 5.89 4.03 3.76 3.77 3.34 3.47 2.92 3.20

A: We know  that correlation coefficient is statistical indicator of the degree of the association…

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Q: The brain volumes (cm³) of 20 brains have a mean of 1115.7 cm and a standard deviation of 124.1 cm³.…

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Q: below for reference.

A: Given,  Independent variable (x) = No of Commercial  Sales Dependent variable (y)  = Volume By using…

Q: A random process X(t) whose mean value is 2 and autocorrelation function is Rxx (7) = 4e²¹²/²1 Find…

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