The lengths of plate glass parts are measured to the nearest tenth of a millimeter. the lengths are uniformly distributed with values at every tenth of a millimeter starting at 590.2, and continuing through 590.9. determine the mean and variance of the lengths. (a) mean (in tenths of millimeters) round your answer to two decimal places (e. g. 98.76). (b) variance (in tenths of millimeters2) round your answer to three decimal places (e. g. 98.765).

Step-by-step explanation:

Given : The lengths are uniformly distributed with values at every tenth of a millimeter starting at 590.2, and continuing through 590.9.

Let x be the random variable that represents the lengths of plate glass parts.

The mean and variance of the random variable X that is uniformly distributed in interval [a,b] is given by :-

In the given situation, a= 590.2 and b= 590.9

Then,

Hence, Mean = 590.55 and Variance = 0.41

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.

it will be a cylinder. with a diameter of 8 and 4 single pieces high

step-by-step explanation: