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Describe how you would use a random number table to get a random sample of 50 people who had listed phone numbers in a phone book that had 7500 people with listed numbers.
What sample size is needed to detect the difference of 10 in a 0:05-level testing against the two sided alternative with power and can you find any statistical evidence showing that the two gray levels are significantly different
an old saying in golf is you drive for show and you putt for dough. the point is that good putting is more important
How many treatments are there? What is the total sample size? Is there a significant difference at the 5% Level of significance?
Four research participants take a test of mannual dexterity (high scores mean better dexterity) and anxiety test (high scores mean more anxiety). Scores are as follows:
Identify the significance level, the test statistic, and the critical value, state whether you are rejecting or failing to reject the null hypothesis statement and explain how the results could be used by the manager of the company.
Assume the distribution of ages of homes follow an approximately normal distribution. Show all the seven steps and include the p-value.
use the frequency distribution table below showing a sample data set for 10 students on a test with a maximum score of
The standard deviation of the population of completion times is minutes, what is the minimum sample size needed for the managers to be confident that their estimate is within minutes of?
find the minimum sample size you should use to assure that your estimate of will be within the required margin of error
From these statistics she calculates a 90% confidence interval of [20.9 grams, 25.1 grams]. What can the researcher do to decrease the width of the confidence interval?
the gotham city police have just received three calls for police. five cars are available. the distance in city blocks
Based on past information, for the cars used, the distance traveled by a car in a day averages 170 km with a standard deviation of 40 km. What proportion of cars used in any day travel less than 100 km?
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