Lesson 15: Error Intervals | Unit 4: Proportional Relationships and Percentages

Multiple Choice

Jada measured the height of a plant in a science experiment and finds that, to the nearest $$\frac{1}{4}$$ of an inch, it is $$4 \frac{3}{4}$$ inches. What is the largest the actual height of the plant could be?

• 4 1/2 inches
• 5 inches
• 4 3/4 inches
• 4 7/8 inches

Multiple Choice

Jada measured the height of a plant in a science experiment and finds that, to the nearest $$\frac{1}{4}$$ of an inch, it is $$4 \frac{3}{4}$$ inches. What is the smallest the actual height of the plant could be?

• 4.5 inches
• 5 inches
• 4.625 inches
• 4.75 inches

Multiple Choice

Jada measured the height of a plant in a science experiment and finds that, to the nearest $$\frac{1}{4}$$ of an inch, it is $$4 \frac{3}{4}$$ inches. How large could the percent error in Jada’s measurement be?

• 3.75%
• 2.63%
• 5.00%
• 1.25%

Multiple Choice

The reading on a car’s speedometer has 1.6% maximum error. The speed limit on a road is 65 miles per hour. The speedometer reads 64 miles per hour. Is it possible that the car is going over the speed limit?

• Yes, it is possible that the car is going over the speed limit.
• No, the maximum error does not affect the speed reading.

Multiple Choice

The reading on a car’s speedometer has 1.6% maximum error. The speed limit on a road is 65 miles per hour. The speedometer reads 66 miles per hour. Is the car definitely going over the speed limit?

• The car is going exactly at the speed limit.
• No, the car is not definitely going over the speed limit.
• Yes, the car is definitely over the speed limit.

Multiple Choice

A thermometer has a maximum error of 0.5 degrees Celsius. If it reads 37.5 degrees Celsius, what is the possible range of the actual temperature?

• 37.0 to 38.0 degrees Celsius

• 37.0 to 37.5 degrees Celsius

• 37.5 to 38.0 degrees Celsius

• 36.5 to 38.5 degrees Celsius

Multiple Choice

A digital scale shows a weight of 150 pounds with a maximum error of 2%. What is the heaviest the actual weight could be?

• 153 pounds

• 150 pounds

• 147 pounds

• 152 pounds

Multiple Choice

A clock is known to have a maximum error of 1 minute per hour. If the clock shows 3:00 PM, what is the earliest it could actually be?

• 2:59 PM

• 2:58 PM

• 3:01 PM

• 3:02 PM

Multiple Choice

A measuring tape has a maximum error of 0.5 cm. If it shows a length of 100 cm, what is the shortest the actual length could be?

• 99.5 cm

• 100 cm

• 100.5 cm

• 101 cm

Multiple Choice

A digital thermometer shows a temperature of 98.6 degrees Fahrenheit with a maximum error of 0.2 degrees. What is the highest the actual temperature could be?

• 98.4 degrees

• 98.6 degrees

• 98.8 degrees

• 99.0 degrees