r a confidence level of 95% with a sample size of 30, find the critical t value

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Q: Find the Critical Values of the t- Distribution needed for a 95% confidence interval for the mean,…

A: Given data confidence interval=95% d .f=6

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A: Given,A random variable U~U(15, 22)f(x)=122-15f(x)=17     ;   15≤U≤22

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Q: In a random sample of 81 audited estate tax​ returns, it was determined that the mean amount of…

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Q: A professor wants to know if her Psychology statistics class has a good grasp of B math. Six…

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Q: ‘In 1996, 31% of students reported that their mothers had graduated college. In 2000, the percentage…

A: The formula to calculate z-test statistic for proportion is given by,  ztest = (p̂ – p)/√[p(1–p)/n]…

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Q: 1. In how many ways can four consonants be chosen from the six letters in the word DRAGON?

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Q: Here are summary statistics for randomly selected weights of newborn girls: n=181, x= 33.4 hg, s=…

A: given data,n=181x¯=33.4s=6.8CI=0.99α=1-CI=1-0.99=0.01df=n-1=181-1=180 here we have to find out the…

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A: given data  ci is : (13.046,22.15) x¯ = 17.598sx = 16.01712719n = 50

Q: In a random sample of 28 high school students, the linear  correlation coefficient R between the…

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Q: For the standard normal variable ZZ , find the probability P(0.07<Z<3.52)

A: We will use Excel to find the required probability based on Standard Normal distribution.

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Q: . Investigators are trying to determine if the contamination of a town well led to significant…

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Q: Find the = value to the left of the mean so that 99.27% of the area under the distribution curve…

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Q: Find the median: 68, 81, 72, 104, 28, 100, 66 Median

A: arrange data in accending order 28,66,68,72,81,100,104 sample size n = 7

Q: Question 9 {3 decimal places} Find the value of the test statistic.

A: The data shows the appraisal value of an apartment of other companies.

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Q: manufacturing industry, the number of industrial accidents averages three per week. Find the…

A: Given that  The number of industrial accidents averages three per week. X ~ Poisson (M = 3)