Answer Happy

Show work: Good Luck! 1) You know that your data has mean = 18 and standard deviation - 2. A) What interval contains all the data within 3 standard deviations of the mean? B) What percentage of the data is in your interval from problem A? 2) You have a known mean of 40 and a standard deviation of 3. What interval contains at least 99% of the data? 3) Here is a tricky one. You know the mean is 33 and you have an interval (27, 39). You also know that this interval contains at least 75% of the data. What is the standard deviation?
4). You have data that is N(20,4): A) What percentage of the data is in ( 24,00)? B) what percentage of the data is in ( 12, 24)?? C) Name an interval that contains approximately 68% of the data. D) Name an interval that contains approximately 95% of the data. E) Name an interval that contains about 16% of the data. (There are two)