TEKS.MATH.7.6F

The Candlelit-Dinner Candle Store surveys its Monday customers to find out their opinion on a new scented candle.  Is this biased or unbiased?

• Biased
• Unbiased

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TEKS.MATH.7.6F

A wildlife reserve has a population of 120 elephants. A group of researchers trapped 42 elephants and recorded their vital statistics. Of the trapped elephants, 35 were female. If that rate holds true for the entire population of 120 elephants, how many female elephants are on the wildlife reserve?

• 100
• 120
• 132
• 216

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TEKS.MATH.7.6F

TEKS.MATH.7.4D

The entire group studied.

• sample
• population

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TEKS.MATH.7.6F

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

• The sample didn't include students.
• The sample is too small.
• The sample can only be accurate if each teacher is included in the sample

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TEKS.MATH.7.6F

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

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TEKS.MATH.7.6F

A city council member wanted to know how her constituents felt about a planned rezoning. She randomly selected 75 names from the city phone directory and conducted a phone survey.

• The population is everyone listed in the city phone directory; the sample is the 75 people selected.
• The population is residents of the city; the sample is the registered voters in the city.
• The population is registered voters in the city; the sample is everyone listed in the city phone directory.

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TEKS.MATH.7.6F

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

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TEKS.MATH.7.6F

I survey a senior citizen center to gain information about the population of NE Oklahoma. Which of the following best describes my population sample?

• Biased, sample is randomly taken or representative of population.

• Biased, sample is not randomly taken or representative of population.

• Representative, sample is randomly taken & representative of population.

• Representative, sample is not randomly taken or biased in terms the of population.

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TEKS.MATH.7.6F

Biased or Random?

Alexis wants to learn what the most popular board game in the United States is, so she creates a poll and shares it on Twitter.

• Biased

• Random

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TEKS.MATH.7.6F

Simon wants to find out which shop has the best frozen fruit drink in town. How could Simon conduct a survey with a sample that is representative of the population?

• Simon could stand outside a popular store in town that does not sell frozen fruit drinks and survey every fifth customer about their favorite local favorite fruit drink shop.

• Simon could stand outside a popular store in town that does sell frozen fruit drinks and survey every fifth customer about their favorite local favorite fruit drink shop.

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TEKS.MATH.7.6F