Mathematics, 29.10.2020 04:50 angieinthehouse45
A recent Harvard study concluded that people who drink coffee tend to live longer than those who don’t drink coffee. The study followed more than 20,000 nurses and doctors over a 30-year period, giving them frequent questionnaires to answer about their coffee habits. Researchers found that people who drank 3 to 5 cups of coffee a day had a mortality rate during the study that is 15% lower than those who did not drink coffee. Identify the explanatory and response variables. Then determine whether each is an experiment or an observational study. Explain your reasoning.
Answers: 1
Mathematics, 21.06.2019 14:30
Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.
Answers: 3
Mathematics, 21.06.2019 17:30
Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules
Answers: 1
Mathematics, 21.06.2019 21:00
Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?
Answers: 2
A recent Harvard study concluded that people who drink coffee tend to live longer than those who don...
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