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In a hypothesis test with hypotheses H0:p≤0.58 and H1:p>0.58, a random sample of size 1186 produced a sample proportion of 0.5985. The test is to be made at the 2.5% significance level.
What is the critical value of z?
What is the value of the test statistic, z, rounded to three decimal places?
What is the p-value for this hypothesis test, rounded to four decimal places?
a quiz consists of 20 multiple-choice questions each with 5 possible answers. for someone who makes random guesses for
1. How did the Tuskegee Airmen contribute to victory in World War II?
A food inspector, examining 12 jars of a certain brand of peanut butter, obtained from the fofollowing percentages of impurities: 2.3, 1.9, 2.1, 2.8, 2.3, 3.6, 1.4, 1.8, 2.1, 3.2, 2.0 and 1.9.
Find the product of the vector of state probabilities for the preceding period and the matrix of transition probabilities.
Use the data in Problem 1 and develop a regression model to predict selling price based on the square footage and number of bedrooms. Use this to predict the selling price of a 2,000-square-foot house with 3 bedrooms.
Run a simple regression of the dependent variable demand on the independent variable price and observe the coefficient on price.
In Example, the information given was that 3% of a nationwide randomly selected sample of n = 883 suffered from severe allergies.
In a sample of 100 homes, local officials find that 14 had termites less than 1 year after being treated. At the 0.05 level of significance, evaluate the credibility of the exterminator's statement.
From a list of the 729 people who went on a cruise, 25 were randomly selected for interview. Of these, 21 said that they were "very happy".
Amalgamated Fruits, Vegetables, and Legumes, an agricultural company, breeds the experimental fruit "kiwana." The company is studying the effects of a new fertilizer on the number of kiwanas per bunch grown on kiwana trees. The regression analysis be..
Assuming a stable process, calculate a 95% (two-sided) confidence interval for the proportion of all dies that pass the probe.
What sample size would allow us to increase our confidence level to 95% while reducing the margin of error to only 3 hours? Round up to the nearest whole number
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