A manufacturer knows that on the average 2% of the electric toasters that he makes will require repairs within 90 days after they are sold. Use normal approximation to the binomial distribution to determine the prob that among 1200 of these toasters at least 30 will require repairs within the first 90 days after they are sold?

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Q: The value of the test statistic is (Round to two decimal places as needed.)

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A: GivenMean(x)=5.85standard deviation(s)=1.99sample size(n)=189significance level(α)=0.05

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A: Given data: Significance level = 0.05

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A: Given: P = 0.21 n = 100 X = 34 α = 0.01 Formula Used: Test-statistic Z = p^-PP(1-P)n

Q: give an example of a study for which the independent sample t-test  is appropiate

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Q: Draw an area model to represent 5/9

A: The objective is to draw an area model to represent the fraction 59

Q: c) Use the classical approach at the a=0.10 level of significance to find the critical value and…

A: From given data we have ; n=250 x=23.2 s=3.1

Q: لیا Maria is to select one number from the set {60, 61, 62, 63, 64, 65, 66, 67, 68, 69} at random.…

A: Event X: The selected number is an even number. X=60,62,64,66,68 Event Y: The selected number is a…

Q: Find the sample size n needed to estimate p for each of the following situations: a. E = 0.04, p ≈…

A: given data  (a) E = 0.04p = 0.51-α = 0.90α = 1-0.90 =0.10(b) E = 0.01p = 0.51-α = 0.90α = 1-0.90…

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A: Given X=43 Alpha=0.05 n=6

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Q: b) The weight of a green forest frog has a normal distribution with mean 150.3 g and a standard…

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Q: Londell, an accomplished marathon runner, claims that the standard deviation for his time to run a…

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Q: .) The breaking strengths of cables produced by a certain manufacturer have a standard deviation of…

A: As per our guidelines we are suppose to answer only one question kindly post the remaining questions…

Q: What would a t-test look like?

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Q: Statistics Question: A random sample of the birth weights of 186 babies has a mean of 3103 grams and…

A: The sample mean is 3103 and the standard deviation is 696.

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Q: Describe the explained variation about a regression line in words and in symbols. y x (X₁, Yj) •…

A: The sum of squares of the explained deviation values is termed as a explained variation.

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Q: QUESTION 22 The waiting time (in minutes) of customers at a fast food outlet is normally…

A: Given: n = 15 Confidence Interval = (1.83,  2.16) Formula Used: Margin of error E = t*sn Margin of…

Q: A survey of 18 adults in UAE found that the mean age for a person's primary vehicle is 4.6 years and…

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Q: (d) Calculate the conditional probability P(Y> x =). (e) Calculate the probability P(Y > ¹). (f)…

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Q: A study in Sweden compared former elite soccer players with people of the same age who had played…

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Q: A study was done using a treatment group and a placebo group. The results are shown in the table.…

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Q: 7.1.7. Let X₁, X2,..., Xn denote a random sample from a distribution that is N(μ,0), 0 < 0 < x,…

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Q: Assume that a sample is used to estimate a population proportion p. Find the 99.5% confidence…

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Q: Suppose you want to check whether a coin is fair or not. You flip the coin 100 times and get 54…

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Q: Express the confidence interval (82.6%,89.8%) in the form of ˆp ± ME   ____% ± ____ %

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Q: Oral N-acetylcysteine (NAC) exerts a beneficial action in chronic bronchitis by reducing the number…

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Q: A study investigated ways to prevent staph infections in surgery patients. The researchers examined…

A: given data  n = 100 x = 86 80% ci for p.  p^ = xn = 86100 = 0.86

Q: Let X₁,..., Xn each be independently distributed N(μ, o2) where o = 3.0. Suppose the sample mean is…

A: Given, σ=3.0, and x¯=58.3 We need to compute the confidence interval for mean. Note that since you…

Q: 2. According to Eckhoff University statistics, the probability that any of its students is married…

A: Given The probability that any of its students is married=30%sample size =23

Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…

A: Given: n1 = 100 p1 = 0.34 n2 = 100 p2 = 0.44 α = 0.05 Formula Used: Test-statistic Z =…

Q: The following table shows the weights (in pounds) and the number of hours slept in a day by a random…

A: Given data: Weight, x Hours slept, y 8.1 14.8 10.3 14.7 9.9 14.1 7.2 14.2 6.9 13.8…