Stats Quiz Review

Which of these represents a random way to group people for an experiment? Select all that apply.

• flip a coin for each person

• sort alphabetically based on last name

• assign based on IQ

• let people randomly decide for themselves

What is the singular form of the word "dice"?

What is the key feature that makes an experiment, an experiment?

• dividing into two groups to change one variable

• asking questions directly to the participants

• observing responses without interaction

• getting data from more than 100 participants

Which of the following are characteristics of a normal distribution? Select all that apply.

• it's shaped like an upside-down V

• the standard deviation is at the center

• the area under the curve is 1

• 95% of the data is within 3 standard deviations

• if you have the median you can draw the normal curve and do all the calculations

Which element has the chemical symbol Fe on the periodic table?

Some plants have a mean height of 10 inches with a standard deviation of 2 inches. Approximately 68% of the plants should have a height between ___ ___ ___ inches.

• 8 and 12

• 6 and 14

• 4 and 16

• 9 and 11

• 0 and 10

Consider a normal curve with mean 100 and standard deviation 10. Determine the proportion of data that falls between 73 and 90. Use Desmos if necessary.

• 0.155

• 0.259

• 0.336

• 0.541

• 0.659

Find the standard deviation of {2,3,4,10,11,12,15,19}

• 5.68

• 2.49

• 3.19

• 7.22

• 19

Which US state comes first in an alphabetical list?

How many serial numbers are possible if they contain 3 letters followed by 5 digits? The letters can NOT repeat but the digits can.