You measure 43 watermelons' weights, and find they have a mean weight of 75 ounces. Assume the population standard deviation is 9.1 ounces.

You measure 43 watermelons' weights, and find they have a mean weight of 75 ounces. Assume the population standard deviation is 9.1 ounces.
Based on this, construct a 95% confidence interval for the true population mean watermelon weight.
Give your answers as decimals, to two places ±± ounces
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 34.6 for a sample of size 393 and standard deviation 9.5. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).
< μμ <
Answer should be obtained without any preliminary rounding.
SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample?
Make sure to give a whole number answer.
Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Out of 200 people sampled, 174 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places < p <
Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity
Box 2: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity
In a survey funded by the UW school of medicine, 750 of 1000 adult Seattle residents said they did not believe they could come down with a sexually transmitted infection (STI). Construct a 95% confidence interval estimage of the proportion of adult Seattle residents who don't believe they can contract an STI. (Use a zz score of 1.96 for your computations.)
· (.728, .772)
· (.723, .777)
· (.718, .782)
· (.713, .878)
· (.665, .835)
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.
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