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A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the .025 significance level.
A. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)Reject H0 when z < _________
B. What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)What is the value of the test statistics?
C. What is the p-value? (Round your answer to 4 decimal places.)
In a series of seven games, the ?rst team to win four games wins the series. If the teams are evenly matched, what is the probability that the team that wins the ?rst game will win the series?
We suspect that automobile insurance premiums (in dollars) may be steadily decreasing with the driver's driving experience (in years), so we choose a random sample of drivers who have similar automobile insurance coverage and collect data about th..
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?
Calculate the margin of error that would be used to determine a 99% confidence interval for the mean pulse rate of all women.
the return on investments earned by your company for four successive years was 20 -20 50 and 120. what is the geometric
What is the arithmetic mean of the Alaska unemployment rates? Find the median and the mode for the unemployment rates.
during the recent primary elections the democratic presidential candidate showed the following pre-election voter
suppose iq scores were obtained from randomly selected twins. for 20 such pairs of people the linear correlation
the probability that sammy makes his own lunch is 0.75. the probability increases to 0.8 if he made his own lunch the
Reconsider the corn yield and rainfall data (Display 9.18; data file ex0915). Fit the regression of yield on rainfall, rainfall-squared, and year. Use the approach of Section 10.4.5 to find the rainfall that maximizes mean yield.
Determine the probability that subscriber didn't rent the car during past 12 months for either business or personal reasons?
if you had the chance to set up a simple experiment at your workplace to test a hypothesis would you have your research
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