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Statistics - All Topics

Question 2:

All 6 members of a family work. Their hourly wages (in dollars) are

18, 26, 31, 10, 13, 40

Assuming that these wages constitute an entire population, find the standard deviation of the population. Round your answer to at least two decimal places.

Question 3:

Petroleum pollution in oceans stimulates the growth of certain bacteria. An assessment of this growth has been made by counting the bacteria in each of 5 randomly chosen specimens of ocean water (of a fixed size). The 5 counts obtained were as follows:

41, 59, 44, 40, 41

Find the standard deviation of this sample of numbers. Round your answer to at least two decimal places.

Question 4:
Evaluate the following. 8+6/2+3*6

Question 5:
Evaluate the following expression. [19+(15-11)*2]/9

Question 6:
Round 8.655 to the nearest hundredth.

Question 7:
Write 35% as a fraction in simplest form.

Question 8:
Write 40/50 as a percentage.

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