If I have a sample of 20 people what is my T-threshold for a two-tail test and an alpha of 0.1 percent?

Q: number of components must fail before completing the 100 hours of work, considering that the…

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Q: 2. For the following information on a data set: Measurement Class .00-.75 75-1.50 1.50-2.25…

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Q: Z= -0.83

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Q: A 95% confidence interval of 19.5 months to 47.1 months has been found for the mean duration of…

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Q: A) Following is a boxplot for the data above is it reasonable to assume that the condition for…

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A: Given,n=170p=0.875A random variable X~Binomial(n=170 , p=0.875)

Q: a. Use the one-mean t-interval procedure with the sample mean, sample size, sample standard…

A: (a) Obtain the 90% confidence interval for the population mean. The 90% confidence interval for the…

Q: Given the standard normal distribution, find P(z0.73)

A: Let z be the standard normal variable with mean is μ=0 and standard deviation is σ=1 The probability…

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A: From the provided information, Sample size (n) = 12 Level of significance (α) = 0.05

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: Given,mean(μ)=55.8standard deviation(σ)=9

Q: According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is…

A: 1. The provided information is  n=20x¯=45σ=7α=0.01The null and alternative hypothesis is…

Q: I don't see the -0.6725 on the s chart?

A: With respect the previous question given Mean μ=100Standard deviation σ=15 The IQ score has to be…

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A: Know that  Null and alternative hypothesis is denoted by H0 and H1.

Q: J 2 Illustrate the value of Bayesian Analysis: Using probability, explain why is it so much more…

A: Let,E1 = Person from under-represented ethnic group population E2= Person from an over-represented…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.9…

A: Given: Population meanμ=8.9Standard deviationσ=2.9

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: Given that.   X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: Out of 500 people sampled, 170 had kids. Based on this, construct a 99% confidence interval for the…

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Q: item test. The standard deviation of the eviation of the sample is 10. Construct a 95% confidence…

A: Given data,No of students n=22The mean is x=60The sample sd is s=10Construct a 95% CI?

Q: Test the claim that the proportion of people who are confident is larger than 60% at the 0.01…

A: here given ,  A well-known brokerage firm executive claimed that 60% of investors are currently…

Q: Q2: Use Linear Least-Squares Regression to fit the following variables: 7 10.1 Xi yi 1 1.3 2 3.5 3…

A: Given data set is xi yi 1 1.3 2 3.5 3 4.2 4 5.0 5 7.0 6 8.8 7 10.1 8 12.5 9 13…

Q: Suppose you are testing Hoμ = 94 against Ha: μ< 94. From an SRS of 68 individuals, you compute X =…

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Q: As reported in Table 5.1, the mean SAT Evidence-Based Reading and Writing (ERW) score was 536 with a…

A: (1) Obtain the percentage of students scored above 625. The percentage of students scored above 625…

Q: Suppose that the amount of time that students spend studying in the library in one sitting is…

A: "Since you have posted a question with multiple subparts, given 3 solved question so we have solved…

Q: An automotive manufacturer wants to know the proportion of new car buyers who pref foreign cars over…

A: A sample of 897 cars; n=897 304 preferred domestic cars; x=304 α=0.05

Q: 4(x + y) 5x³ f(x, y) = Let pdf with 14]=16 then the value of A which make this probability true is…

A: Answer.     B.  1/12

Q: In a study of statistics professors' salaries (USA) the following data was obtained: n=13,…

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Q: You measure 24 textbooks' weights, and find they have a mean weight of 45 ounces. Assume the…

A: 24 textbooks weights measured with mean is 45; n=24  x=45 The population standard deviation is 6.4;…

Q: Women athletes at a certain university have a long-term graduation rate of 67%. Over the past…

A: "We will solve the first three subparts of the question for you. If you want any specific question…

Q: a club consists of 5 men and 4 women. in how many ways can this club elect a president, Vice…

A: Given data A club consists of 5 men and 4 women

Q: 51 69 73 74 75 82 89 93 98 100 and the range. 68 69

A: Given Range =Highest value - lowest value

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 6.4 inches,…

A: Given Mean=6.4 Standard deviations=0.5

Q: Muzzle velocities of eight shells tested with a new gunpowder yields the following results 2959 ft/s…

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Q: A. Compute the margin of error for each of the following cases. Assumes that the population is…

A: 1)Givensample size(n)=400population standard deviation(σ)=58confidence level = 955

Q: He scores higher than what percent of all adults? What if his score were 95? Find the value for Z…

A: here given , The scores of adults on an IQ test are approximately normal with mean 100 and standard…

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The…

A: The summary of statistics is,

Q: Correlation coefficients in the range of +0.81to1 indicate that there is very high correlation. True…

A: Sol: True :-

Q: School X School Y 1. 3. Number of Years Teachers Have Been Teaching 5. 7. 2 4 6 8 What is the median…

A: The comparative boxplot is employed to contrast different collections of information pertaining to…

Q: part D E F

A: Sample size n = 25 Formula Used: Confidence interval = X ± tsn

Q: 39 9 7 38 21 18 a point estimate for the population standar 33 19 24 34

A: The given data is x 7 39 38 33 24 21 9 18 19 34

Q: When α= 0.10 and n=30 ,   χ2left =     χ2right =

A: Given that α=l.o.s.=0.10 n=30

Q: Assume there is a certain population of fish in a pond whose growth is described by the logistic…

A: The starting population is given as p0=100 The growth is 240% per year and the growth rate is 2.4…

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A: Given data isMean(x)=47standard deviation(s)=9sample size(n)=17confidence interval=98%

Q: A) determine the correlation coefficient, rounded to the nearest thousandth b) find the equation of…

A: here given data for time watching TV  and time on internet  here take x=  time watching TV y = time…

Q: In the General Social Survey, respondents were asked "If your party nominated a woman for President,…

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Q: There is a [a] correlation between the amount of salary and efficiency ratings – that means, an…

A: Here Given  A manager of a company wants to study the correlation between the amount of salary and…

Q: actually 0.25 (we normally wouldn’t know this, but suppose hypothetically someone was able to know…

A: The total number of exposed and non-exposed  in the source population   Cases Controls Exposed…

Q: The accompanying data show the number of bacteria present after a certain number of hours. Find the…

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Q: A personnel director in a particular state claims that the mean annual income is greater in one of…

A: Given:A personnel director in a particular state claims that the mean annual income is greater in…