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A census is a ________________ of an entire population
A restaurant claims that its speed of service time is less than 18 minutes. A random selection of 36 service times was collected, and their mean was calculated to be 17.7 minutes. Their standard deviation is 3.1 minutes. Is there enough evidence to support the claim at alpha = .08. Use the p-value. (Hint: first show Ho and Ha. Then calculate the proper test statistic, use the table or Excel to get the P-value)
Determine the minimum required sample size if you want to be 99% confident that the sample mean is within 2 units of the population mean given sigma = 7.8. Assume the population is normally distributed.
Sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
The following is the number of minutes to commute from home to work for a group of automobile executives.
Recognize and explain potential threats (up to 3) to external validity.
An instructor claims the average time to take a statistics test is greater than 39 min. As, if a sample of 33 students took 43 min. is the instructor's claim true?
What is sampling error? Could value of sampling error be zero? If it were zero, what would this mean?
A fair coin is flipped 3 times. Compute the odds of flipping 3 tails.
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
A combination of content and supportive examples would be greatly appreciated.
Digital camcorder repair service has set the goal not to exceed average of 5 working days from time unit is brought in to time repairs are completed. Compute the t-value.
When n = 250, determine the probability that proportion of couples in sample who are racially or ethnically mixed will be greater than 0.07?
Describe the meaning of alternatives, criteria and states of nature. How are they utilized in decision analysis?
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
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