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Find a 95% confidence interval for the proportion of customers who purchase the extended service plan.
Find a 95% confidence interval for the proportion of all customers who would benefit by purchasing the extended service plan.
Test the appropriate hypothesis by comparing with a critical value using o: = 0.05, and explain what your results mean. Compute the p-value for the test in part (a) and use it to perform the hypothesis test.
1 a sample of 100 elements produced a mean of 48 and a standard deviation of 8. the 99 confidence interval for the
When the purpose of sampling is to detect when a process becomes too variable the chart of choice will be a c-chart?
a study looked at the relationship between condom use and the spread of aids by following heterosexual couples in which
When is it important to have matched pairs rather than two independent sets of data?
Find a 98% confidence interval for the true proportion of students who have a personal blog with a maximum margin of error of 0.03. How many students do you survey?
one environmental group did a study of recycling habits in a california community. it found that 71 of the aluminum
the personnel director of a large corporation wishes to study absenteeism among clerical workers at the corporations
a sample of 65 observations is selected from one population with a population standard deviation of .75. the sample
Medication, 47% take cholesterol-lowering medication, and 12% take both medications. What is the probability that a senior citizen takes either blood pressure-lowering or cholesterol-lowering medication?
we are supposing that the proportion of all adults who think that two children is ideal is p0.52. what is the
determine the probability that at least 2 people in a room of 11 people share the same birthday ignoring leap years and
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