4/16 estimating population totals

A factory produces light bulbs. Approximately 95.5% of the light bulbs were in perfect condition with a margin of error of ±1.2%.

If the factory manufactures 20,000 light bulbs, how many of them would most likely be without any defects?

• 19

• 10,000

• 19,100

• 21,000

Tags

CCSS.7.SP.A.2

A plant specializes in producing batteries. Roughly 92.3% of the batteries meet the company's high standards with a margin of error of ±2.1%.

If the plant produces 50,000 batteries, how many would most likely be free from defects, accounting for the margin of error?

• 44,300 - 45,100

• 46,000 - 47,000

• 45,100 - 47,200

• 48,000 - 50,000

A manufacturer produces electric kettles. 98.6% of the kettles were without any manufacturing errors with a margin of error of ±0.8%.

If the manufacturer makes 30,000 electric kettles, how many would most likely be without any manufacturing errors, accounting for the margin of error?

• 27,180 - 31,980

• 29,400 - 29,450

• 29,580 - 29,760

• 30,000 - 30,240

Tags

CCSS.HSS.IC.B.4

A toy company specializes in making miniature cars. 89.7% of their cars do not have any manufacturing flaws, with a margin of error of ±1.8%.

If the company produces 15,000 miniature cars, how many of them would probably be without manufacturing flaws?

• 150

• 13,455

• 13,500

• 15,000

Tags

CCSS.7.SP.C.6

A 2017 survey conducted among 100 middle school students in Orlando asked whether they agreed with the statement, "I believe that teamwork leads to greater success than working alone." The survey found that 78 students agreed with the statement with a margin of error of ±4%.

If the actual number of middle school students in Orlando is 5000, what would be the estimated number of students who agreed with the statement?

• 3900 – 4200

• 3840 – 4000

• 3780 – 3900

• 3700 - 4100

Tags

CCSS.HSS.IC.B.4

A 2021 survey of 100 office workers in Miami was conducted to find out how many people used public transportation to commute to work. The survey found that 60 of the respondents used public transportation with a margin of error of ±5%.

If the actual number of office workers in Miami is 10,000, what would be the estimated number of workers who use public transportation to commute?

• 5250 – 5750

• 5400 – 6600

• 5500 – 6500

• 5700 – 6300

Tags

CCSS.HSS.IC.B.4

A survey found that 93.75% of college students in Oviedo eat fruit every week, with a margin of error of ±4%.

If the actual number of college students in Oviedo is 2000, what would be the estimated number of students who eat fruit every week?

• 1420 – 1580

• 1795 – 1955

• 1455 – 1555

• 1500 – 1700

Tags

CCSS.HSS.IC.B.4

The table shows the height and weight of a group of dogs. What type of data is shown on the table?

• univariate numerical

• univariate categorical

• bivariate numerical

• bivariate categorical

The table shows height and weight of a group of dogs. Select all the graphs that could be used to represent the data shown

• scatter plot

• line plot

• line graph

• histogram

• bar graph

The table shows different types of fruit grown in Agraria. What type of data is shown?

• univariate numerical

• univariate categorical

• bivariate numerical

• bivariate categorical

Answer explanation

remember to ignore the table and just read the description when deciding the data type.

the description just says "The table shows different types of fruit grown in Agraria"

the only question they're asking is "what kind of fruit grows here?"

Since they're only asking one question, the data is univariate.