Suppose a continuous probability distribution has an average of μ=35 and a standard deviation of σ=16. Draw 100 times at random with replacement from this distribution, add up the numbers, then divide by 100 to get their average. To use a Normal distribution to approximate the chance the average of the drawn numbers will be between 30 and 40 (inclusive), we use the area from a lower bound of 30 to an upper bound of 40 under a Normal curve with its center (average) at __ and a spread (standard deviation) of __ . The estimated probability is __

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

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.

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step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m