The following data shows students marks before and after they attended a remedial statistic “boot camp”. Is there evidence at the 0.05 level of significance that the boot camp improved the participants’ scores on the statistics test, stating the null and alternative hypothesis?

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A: The answer to your question is as given in steps below.

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A: given data normal distributionμ = 20σ = 1n = 100expected sample mean = ?

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A: Given Information: The mean of the distribution, μ=5.4 The standard deviation of the observation,…

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Q: The joint probability distribution of two random variables X, Y is given in the table below. Y=-4…

A: y=-4 y=-2 y=0 y=2 y=4 total x=0 0.02 0.07 0.11 0.03 0.08 0.31 x=2 0.00 0.11 0.09 0.12 0.00…

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A:

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A: Given data :  Determine which numbers could not be used to represent the probability of an event.

Q: . A researcher studying public opinion of a proposal obtains a simple random sample of 40 adult…

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Q: The following table provides a frequency distribution for the number of rooms in this country's…

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Q: population of values has a normal distribution with �=214.5 and �=71.6. You intend to draw a random…

A: Given that.   X~N( μ , ?)   μ=214.5 , ?=71.6  , n=114   Z-score =( x - μ )/?

Q: Data Group 67 72 65 69 71 62 64 71 67 71 75 68 73 59 64 67 63 68 70 A A A A A B B B B с C C с D D D…

A: Solution: From the given information, Data Group 67 A 72 A 65 A 69 A…

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Q: A population of values has a normal distribution with μ = 144.5 and o random sample of size n = 100.…

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Q: Suppose a simple random sample of size n=10 is obtained from a population with μ=68 and σ=19. Answer…

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A: (a)   Use EXCEL to determine the regression equation.   EXCEL procedure:   Go to EXCEL Go to…

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Q: B) A city's population in 2007 was about 568 thousand, and had been growing by about 1.1% each year.…

A: Given: A city's population in 2007 was about 568 thousand. It had been growing by about 1.1% (0.011)…

Q: WHAT ARE THE Probability of Picking at most 3 hoads in 10 tosses of a coin Me total trials M₂ P =…

A: When toss a coin then probability of getting head  p = 1/2 = 0.5 q = 1 - p = 1 - 0.5 = 0.5 Number of…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 38 hours…

A: Answer: From the given data, mean(μ) = 480 standard deviation (σ) = 38 X~Norma(480,38)

Q: Mean:21.1 Standard Deviation: 4.9 1. What is the probability that a random sample ofnn=40 oil…

A: 1. Suppose a random variable x defines the time required to get an oil change.

Q: The annual income for a sample of 450 part-time students is normally distributed with a mean income…

A: Given that.   X~N( μ , ?)   μ=31000 , ?=3000   Z-score =( x - μ )/?

Q: Z0.975 = 1.96   What does the "0.975" represent? What does the "1.96" represent? Group of answer…

A: Given that  Z0.975 = 1.96

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 38 hours…

A: given data normal distributionμ = 480σ = 38P(x≥505) = ?

Q: Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding…

A: Data given 127.9,137.8,126.3,132.3,142.6,135.3,138.9,128.9

Q: Consider the following marks obtained by 20 students in a quantitative methods class test.  64 89 63…

A: Given that: 64, 89, 63, 61, 8, 87, 74, 72, 54, 8862, 81, 78, 73, 63, 56, 83, 86, 83, 93

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Q: Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages…

A: For the distribution of the weight of 10-ounce packages of cookies, σ is defined to be 1.5 ounces.…

Q: For the following setting, (a) describe the parameter of interest, and (b) state the appropriate…

A: Given that: Population proportion, p=0.85 Sample size, n=100 Number of successes, x=75

Q: You wish to estimate, with 95% confidence, the population proportion of U.S. adults who want more…

A: At 95%  confidence level critical value is 1.96 by excel