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1. Provide a 95% confidence interval for the true proportion of residents in this neighborhood who would be interested in purchasing organic coffee.
2. How many residents would have to be surveyed in order to have a margin of error at the 95% confidence level to be less than 3%?
The variable TimeToNext is the time until the next eruption after the present eruption. Draw a histogram of this variable. Describe the shape of the histogram.
Use the given date to find the minimum sample size required to estimate a population proportion and populat mean. Margin of error: 0.004, confidence level, 90%, sample proportion (p) : = 0.45
In analyzing two independent small samples you notice that the standard deviation for both samples are the same. How does this affect the S2p (the pooled variance)? Explain your answer.
The interpretation of natural logarithms and common logarithms
what is the smallest mean μ that can be used so that at least 99.5% of all cans meet the regulation? - what is the probability that a typical can has at least 12 ounces?
What is the calculation if facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57 . If i was to take a sample of 25 students, what is the probability that the mean number of facebook frie..
Perform a significant test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p-value.
A survey indicates that male employees were more likely than females to relocate without being promoted. What information would you want to know before you accepted the results of this survey?
For the following data set, indicate whether the shape of the distribution is normal, positively skewed, or negatively skewed. Provide evidence for your answer by calculating the mean, mode, and median.
suppose there are 10 drawers each containing two coins. drawers 1 and 2 contain only gold coins while in drawers 34 and
one study on slavery estimated that a slave had only 2 chance of being sold into the interstate trade each year. this
At 0.05 level of significance, is there evidence that proportion of claims processed under this new system is higher than article reported for previous system?
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