Astandard i. q. test produces normally distributed results with a mean of 104 and a standard deviation of 16 for 52,000 students in grade 12 in the province. approximately how many of these people would have i. q.s below 76? 4,170 23,915 2,127 2,083

The IQ scores are RVs (X) normally distributed with mean and standard deviation .

The probability is calculated after converting the raw score to the standard score,

.

Now use normal distribution table or technology,

.

Thus, the number of people who would have I.Q.s below 76 out of 52,000 is

.

Therefore, the approximate number is .

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.

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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