Statistics

Presentation

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Mathematics

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7th Grade

•

Medium

•

CCSS

7.SP.A.1, 7.SP.A.2, 7.RP.A.3

+13

Standards-aligned

JIMMY PIERCE

Used 314+ times

FREE Resource

5 Slides • 12 Questions

Statistics

Biased & Unbiased

Population - an entire group
Sample - a part of the population
Random Sample - members of the population are chosen at random
Convenience Sample - members of the population that are readily available
BIASED SAMPLE - does not fairly represent the population.

Lets look at

Biased and Unbiased samples

Multiple Choice

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

thirty students who are often tardy

thirty students who are rarely tardy

thirty of her friends

thirty randomly selected students from her school

Multiple Choice

At an assembly 7 out of 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

490

210

421

Multiple Choice

To determine the most popular children’s programs, a television station asks parents to call in and complete a phone survey.

Biased Sample

Unbiased Sample

Multiple Choice

To evaluate the defect rate of its memory chips, an integrated circuit manufacturer tests every 100th chip off the production line.

Biased Sample

Unbiased Sample

Multiple Choice

Define bias.

tolerance

two sided

in favor of one side

hate

Multiple Choice

The quality of being believable or trustworthy is called?

Credibility

Evidence

Support

Cite

Multiple Choice

A solid and reasonable argument that opposes or disagrees with your claim

claim

counterclaim

support

rebuttal

Multiple Choice

What is an unbiased resource?

source not cited

unfair

cited source

neutral or fair;

Making inferences with collected data.

Making predictions based on data

Random sampling

Multiple Choice

Fill in the Blanks

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Suppose there are 684 students at the school. How many can be expected to prefer E-mail? (just type in the number)

Type answer...

Fill in the Blanks

A bank randomly surveyed 50 of its customers by mail to find out how customers use its mobile banking service. The survey found that only 11 of the 50 customers used the service.

If the branch has 1,700 customers, about

Type answer...

customers use the mobile banking service.

*Only type in the numerical answer.

Multiple Choice

Zoie completes a report by asking 70 students across campus. She found that 48% of CIAA students do not wash their hands after using the bathroom. What is the sample size?

100

CIAA students

Statistics

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