At Indiana Dunes State park the maximum allowable standard for swimming in the lake are 235 colonies of E. coli per 100 ml of water (source). In order to measure this, 10 different measurements of E. coli are taken each day at different locations in the lake near the beach. On a given day, the 10 measurements were 118, 175, 190, 206, 207, 208, 249, 256, 260, and 289. Assuming the underlying distribution of E. coli counts is normal, construct a 99% confidence interval for the true mean number of colonies of E. coli per 100 ml of water.

What is the definition of exponential decay?

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.