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1. What is a p-value, and how is it relevant to hypothesis testing?
2. The p-value for a hypothesis test has been reported as 0.03. If the test result is interpreted using the α = 0.05 level of significance as a criterion, will H0 be rejected? Explain.
Wwith a standard deviation of 1.7 grams. Assuming the distribution of weights is normally distributed, 4% of whooping crane eggs weigh less than how many grams?
(a) Calculate the least-squares regression line for these data. (b) Plot the points and the least-squares regression line on the same graph.
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
a pair of dice is rolled 10 times. what is the probability that a sum of seven is observed at most three
Identify a research question from your professional life or career specialization that can be addressed by an independent samples t test.
The distribution of the height of students in a large class is roughly bell-shaped. The average height is 68 inches, and approximately 95% of the heights are between 62 and 74 inches. Thus, the standard deviation of the height distribution is appr..
Construct a time series plot. What type of pattern exists in the data? Compute the exponential smoothing forecasts for a = .2.
Determine the range and standard deviation of the times.
If you draw two balls without replacing the first one, what is the possibility that one ball is red and the other is white.
The coffee/soup machine at the local bus station is supposed to fill cups with 6 ounces of soup. Ten cups of soup are brought with results of a mean of 5.93 ounces and a standard deviation of 0.13 ounces. Construct a 99% confidence interval for th..
The following data give the annual incomes (in thousands of dollars) and amounts (in thousands of dollars) of life insurance policies for eight persons.
A random sample of 48 managers of large hotels has mean X‾= 5.91. The null hypothesis for the researcher's test is?
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