Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00 degrees°c. a thermometer is randomly selected and tested. draw a sketch and find the temperature reading corresponding to upper p82, the 82nd percentile. this is the temperature reading separating the bottom 82% from the top 18 %.

0.915

Step-by-step explanation:

Given that the readings of  the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00 degrees°C.

Let X represent the reading of the thermometer

X is N(0.1)

Or X is a standard normal variate

we have to find 82nd percentile

i.e. we find z such that

Sketch is attached

82nd percentile is 0.915

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.