Flashback - Average

What is the formula for calculating the average of a set of numbers?

• Add all the numbers together and divide by the count of the numbers.

• Multiply all the numbers together and divide by the count of the numbers.

• Subtract the smallest number from the largest number and divide by two.

• Add the largest and smallest numbers and divide by two.

How can outliers affect the average of a data set?

• Outliers can skew the average, making it higher or lower than the typical values in the data set.

• Outliers have no effect on the average of a data set.

• Outliers only affect the median, not the average.

• Outliers can only increase the average, never decrease it.

How do you find the average of a set of daily observations?

• Sum the total observations and divide by the number of days.

• Multiply the total observations by the number of days.

• Add the highest and lowest observations and divide by two.

• Count the number of observations and multiply by the number of days.

If Peter has an average score of 60 from 3 tests, what is the total score he has achieved so far?

• 150 points

• 180 points

• 200 points

• 160 points

What is the average amount of money Mandy earned per day if she earned $4, $7, $5, $4, and $5?

• $4

• $5

• $6

• $7

What is the average number of birds Jean saw each day if she saw 7, 11, and 0 birds over three days?

• 5 birds

• 6 birds

• 7 birds

• 8 birds

How do you calculate the average earnings over a week?

• Sum the total earnings for the week and divide by the number of days worked.

• Multiply the total earnings by the number of days worked.

• Add the highest and lowest earnings and divide by two.

• Take the total earnings and multiply by seven.

How do you calculate the average score from multiple tests?

• Add all the test scores together and divide by the number of tests taken.

• Multiply all the test scores together and divide by the number of tests taken.

• Add the highest and lowest test scores and divide by two.

• Take the median of the test scores.

What is a weighted average and how is it different from a simple average?

• A weighted average treats all values equally, while a simple average takes into account the relative importance of each value.

• A weighted average takes into account the relative importance of each value, while a simple average treats all values equally.

• A weighted average is calculated by adding all values together and dividing by the number of values, while a simple average is calculated by multiplying each value by its weight before summing.

• A weighted average is only used in financial calculations, while a simple average can be used in any context.

What is the importance of context when interpreting averages?

• Context is crucial as it helps to understand the relevance and implications of the average in real-world situations.

• Context is irrelevant and does not affect the interpretation of averages.

• Context only matters in statistical analysis, not in real-world applications.

• Context can be ignored when averages are calculated.