It is claimed that the average life span of people in rural area is more than 64 years old with a standard deviation of three years. Test this claim at 0.05 level of significance if in the random sample of 250 people, the mean life span resulted to 66 years.

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A: Arranging Observations in the ascending order, We get…

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Q: Outcome Frequency 1 6 QUIZ: Direction: Choose the letter of the correct answer. 2 2 (For items 1&2)…

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A: Given data is -2,7.2,6.9,-10.4,5.3sample size(n)=5

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Q: 19% of all college students volunteer their time. Is the percentage of college students who are…

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Q: probability that the number on the ticket is divisible by 2 or 3 is

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Q: Calculate the means and standard deviations of:37, 26, 19, 21, 19, 25, 17 6.9 ;3 .a O 2.414 :3 .b…

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Q: D E Totals A 0.10 0.30 0.40 B 0.25 0.05 0.30 C 0.10 0.20 0.30 Totals 0.45 0.55 1.00

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Q: 6 cards are drawn at random from a standard deck. Find the probability that all the cards are…

A: Given data: Total card in standard deck of card = 52

Q: z is a standard normal random variable. The P(-1.96 ≤z S-1.4) equals O a. 0.475 Ob. 0.0558 O c.…

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Q: (a) Find the probability that a study participant has a height that is less than 67 inches. The…

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Q: If random variable X has a binomial distribution with n=9 and P(success) =p= 0.4, find the standard…

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Q: 3. The following table lists the probability function of the discrete variables (X, Y). Known that…

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Q: A coin is flipped 30 times. Find σ². Round to 1 decimal place.

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Q: Find the probability of 3 coins showing all heads when tossed simultaneously.

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Q: xample: A continuous random Variable x has X70 fx(x)= 120 0 Find the E(X). -ax X40 probability…

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Q: There are on average 20 old growth Sitka Spruce trees per acre in a local forest. Find the…

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Q: The random variables A and B have variances 0.2 and 0.5 respectively. Let T= 5A+2B. The variance of…

A: Here given  Var(A) = 0.2 Var(B) = 0.5 T = 5 A + 2B

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Q: f(x, y) = ) = (x ² + 232,0. +3,0 < x < 1,0 < y < 2, elsewhere. 0, g(x)= 2x (x + 1/3), h(y)= 1/3 +…

A: Given f(x,y)= x2+xy/3 ;0&lt;x&lt;1, 0&lt;y&lt;2  Note: According to Bartleby guidelines expert solve…