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A social worker wished to determine if the race of loan applicants was independent of the approval of loans. The following table presents the results of her survey:
Applicants for Loans
Ethnicity Approved Rejected
Caucasian 213 189
Black 374 231
Asian 358 252
Conduct the appropriate hypothesis test that will provide an answer to the social worker. Use a significance level of 0.01. Please be sure to clearly state the null and alternative hypotheses, critical value, test statistic, and conclusion.
Describe a joint distribution of random variables X and Y such that Cov(X, Y ) = 0, but X and Y are not independent.
a textile manufacturing process finds that on average 3 flaws occur per every 180 yards of material produced.a. what is
Consider a normal population with μ = 47 and σ = 6. Calculate the z-score for an x of 46.3 from a sample of size 26. (Give your answer correct to two decimal places.
how much less wrinkling? you found that the hylite process results in significantly greater wrinkle resistance thatn
The level of various substances in the blood of kidney dialysis patients is of concern because kidney failure and dialysis can lead to nutritional problems.
Facebook users by country. The following table gives the numbers of Facebook users by region of the world as of December 31, 2011:
A fair coin was flipped three times and landed heads three times. What is the probability of a head on the next toss?
The Delaware Lottery is offering customers a chance to win $10,000. Customers pay $5.00 for a ticket (there are 3000 tickets sold only). Second prize is $1,000. If a customer buys only one ticket, find the expected value of this lottery game.
Write each of the following events in set notation and give its probability.- The vehicle is a light truck.- The vehicle is an imported car.
Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.
Find the sample proportion and the 95% margin of error for the proportion of undergraduates who spend no time on Facebook
An auto manufacturing company wanted to investigate how the price of one of its car models depreciates with age. The research department at the company.
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