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A researcher wants to estimate the average amount of time that people spend to get to work. Based on previous data, the travel times are normally distributed with a mean of 25.2 minutes and standard deviation of 5.4 minutes. What is the required sample size, if the researcher wants to be accurate to within 0.5 minutes at a 95% level of confidence?
What are the three vertical integration of a business and why is it vital to organizational success?
Some of the factors affect statistical power for a one sample t test. How does statistical power change (increase or decrease) for each of the following changes?
A spray can is used until it is empty except for the propellant gas, which has a pressure of 1344 torr at 23 °C. If the can is thrown into a fire (T = 475 °C),
A pizza delivery company buys 42 of these cars. What is the standard deviation of the sampling distribution of samples means?
What is the lower limit of the 95% confidence interval? What is the upper limit of the 95% confidence interval?
Suppose that 47% of all Americans have flown in an airplane at least once and that 28% of all Americans have ridden on a train at least once.
Sources of Individual Shy-Bold Variations in Antipredator Behaviour of Male Iberian Rock Lizards," published online in Animal Behavior in 2005
Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Please test the hypothesis using a = 0.05.
question ameesha drove car at 80 kmph and missed the flight by 5 min. if she drove at 100 kmph she would have reached
What is the null hypothesis for this hypothesis test? What is the alternate hypothesis for this hypothesis test?
assume that a random sample is used to estimate a population proportion p. find the margin of error e that corresponds
State the null and alternative hypotheses. Using the test statistic, degrees of freedom and p-value, what can you conclude about the null hypothesis? What is the 95% confidence interval of the difference? Interpret the 95% confidence interval using t..
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