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The following graph portrays the distribution of the number of Biggie-sized soft drinks sold at a nearby Wendy's for the last 141 days. The mean number of drinks sold per day is 91.9 and the standard deviation is 4.67.
If we use the Empirical Rule, sales will be between what two values on 68 percent of the days? Sales will be between what two values on 95 percent of the days?
telephone marketers and opinion polls use random digit dialing equipment to call residential telephone numbers at
there are 3 coins in a box. the probability of getting head is 23 for two of them while for remaining it is 12. a coin
If the store orders three copies of the magazine, what is the mean value of the profit? (Profit = Revenue - Cost). If the store orders four copies of the magazine, is it better to order four than three copies of the magazine. Explain.
Create the 95% confidence interval for portion of respondents who feel president is doing a good job. Based on the intervalin part(a), It is sensible to conclude that majority.
Differentiate between descriptive statistics and inferential statistics. Provide an example for each. How does correlation analysis differ from regression analysis? What does a correlation coefficient reveal? Is correlation the same as causation?
Calculate the 95% confidence interval for the proportion of students with at least one injury for each of the two subpopulation
Assumed that the standard deviation of the difference in the mean number of drinks is 6.7 drinks.
Distributed with a mean of 8 minutes. What is the probability that it will take a worker between four and nine minutes to complete the task?
Analyze whether or not patients undergoing this treatment are illustrating significant change from baseline to 3 months afterward. Report a p-value.
a study examines self esteem and depression in children using a standardized test for depression. for the general
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.
assume that the population distributions of times in minutes for two different skiers to race the same course are
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