Estimating an Average of a Population Statistics

The table lists five counties with the largest area in Texas. Find the mean.

• 23,197

• 4,639.4

• 4,571

The Table above shows the points scored by the JV basketball team in their first seven games. Calculate the mean, median, mode and range. Which statistical measure makes the team sound the best?

• Mean

• Median

• Mode

• Range

In a sample of 50 people in a town, the average yearly consumption of fruits is found to be 75 kilograms with a margin of error of 10 kilograms. Estimate the total yearly consumption of fruits in kilograms for the town's population of 2000 people.

• 130,000 kg-170,000 kg

• 110,000 kg-120,000 kg

• 180,000 kg- 200,000 kg

• 130 kg- 170 kg

A sample of 600 ninth graders was selected at random and asked how much time they spend on homework each day. Of the ninth graders selected, 220 spend less than 2 hours on homework each day. If the conclusion was drawn that “approximately 1.35 million ninth graders spend less than 2 hours on homework each day,” which of the following is closest to the population, in millions, of ninth graders?

• 0.368

• 0.495

• 3.68

• 5.84

• between 5,700 and 6,000

• between 6,500 and 7,000

• between 5,400 and 6,600

• between 5,400 and 5,900

A survey of 200 students at a high school finds that the average amount of money spent on lunch per week is $25 with a margin of error of ±5. Estimate the total amount of money spent by all students at the high school on lunch per week if there are 1200 students.

• $15,000-$20,000

• $24,000-$36,000

• $770

• $40,000

A survey conducted on 100 households in a neighborhood finds that the average number of pets per household is 3 with a margin of error of ±0.5. Estimate the mean number of pets in all 500 households in the neighborhood.

• between 1250 pets-1750 pets

• between 125 pets- 175 pets

• between 1820 pets- 1940 pets

• between 182 pets- 194 pets

A sample of 600 ninth graders was selected at random and asked how much time they spend on homework each day. Of the ninth graders selected, 220 spend less than 2 hours on homework each day. If the conclusion was drawn that “approximately 1.35 million ninth graders spend less than 2 hours on homework each day,” which of the following is closest to the population, in millions, of ninth graders?

• 0.368

• 0.495

• 3.68

• 5.84

If the mean of a sample is 203 and the margin of error is 4.6, what would be a reasonable mean for the population?

• 99.2

• 198.3

• 207.2

• 207.7