what does this have to do with math?

Math include statistics, which is counting and making data.

why wouldn't it be random if he pick every tenth student he didn't know the tenth student every time. My teacher explained this to me. I think there should have been to answer choices

"every 10th" makes it a systematic approach. the student chosen will still be random, but the way he chooses the student is not random

Main content

Statistics and probability

Course: Statistics and probability > Unit 6

Lesson 3: Sampling methods

Samples and surveys

Google Classroom

When we collect data it's important to know what type of data we're collecting and how to collect it properly.

Problem 1: Qualitative and quantitative data

A survey was given that included data on each student's field of interest, age in years, number of languages spoken, and handedness.

	David	Becca	Paige	...
Field of interest	computer science	journalism	chemistry	...
Age (years)	$13$ ‍	$15$ ‍	$14$ ‍	...
Languages spoken	$2$ ‍	$1$ ‍	$1$ ‍	...
Handed	right	left	right	...

question a

Is "field of interest" qualitative or quantitative?

Question b

Is "age (years)" qualitative or quantitative?

Question C

Is "languages spoken" qualitative or quantitative?

Question D

Is "handed" qualitative or quantitative?

Problem 2: Representative samples

question a

Jillian wants to know what percent of students at her school watch sports on TV. Which strategy for sampling will be more likely to produce a representative sample?

question b

Theo wants to know what percent of students at his school have a computer. Which strategy for sampling will be more likely to produce a representative sample?

(Choice A)
Get an alphabetized list of the names of all students in the school, and pick every tenth student on the list to survey.
(Choice B)
Send an email to every student asking them if they have a computer, and count the first $50$ ‍ surveys that get returned.

Problem 4: Biased wording in survey questions

Willy wants to find what percent of students drink the milk after they finish their cereal. Which survey question below is the most unbiased?

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klopez.dvs
Posted 5 years ago. Direct link to klopez.dvs's post “what does this have to do...”
what does this have to do with math?
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(9 votes)
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- ngolynnhappy
  Posted 4 years ago. Direct link to ngolynnhappy's post “Math include statistics, ...”
  Math include statistics, which is counting and making data.
  Comment on ngolynnhappy's post “Math include statistics, ...”
  (12 votes)
peterbpesch
Posted 8 months ago. Direct link to peterbpesch's post “Why does this page sudden...”
Why does this page suddenly use different terminology?

In Problem 1, we suddenly had to decide whether or not data was "qualitative". During the lessons and previous quizes, this was called "categorical".

In Problem 3, we suddenly had to decide whether or not as sample was "Randow" - During the lessons and the previous quizes this was called "Simple Random" ...
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(4 votes)
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kelstin holmes
Posted 4 years ago. Direct link to kelstin holmes's post “why wouldn't it be random...”
why wouldn't it be random if he pick every tenth student he didn't know the tenth student every time. My teacher explained this to me. I think there should have been to answer choices
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(1 vote)
Answer
- lil
  Posted 2 years ago. Direct link to lil's post “"every 10th" makes it a s...”
  "every 10th" makes it a systematic approach. the student chosen will still be random, but the way he chooses the student is not random
  Button navigates to signup page
  (4 votes)
Eliza
Posted 4 years ago. Direct link to Eliza's post “This is very frustrating....”
This is very frustrating. I have watched all KA videos in order up to HS Stats that this "lesson" is in and there are several questions about topics that were never even touched on. KA, please fix this.

Though I did get a laugh out of the last question ""Do you drink the disgusting leftover milk after you finish your cereal?""
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(1 vote)
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Abdulrahman Aa
Posted 5 years ago. Direct link to Abdulrahman Aa's post “what is the most effectiv...”
what is the most effective type of sampling ? and is there way to know that the sampling type i select is good representative of the population ??
thanks
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(1 vote)
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HomeSchool
Posted 3 years ago. Direct link to HomeSchool's post “The lesson confuses "natu...”
The lesson confuses "nature of study" with "data types." Data is neither qualitative nor quantitative. The questions that ask this are misleading. Data have types. Name/favorite food... nominal; Age... ordinal; Handedness/Gender... categorical; Height... continuous; etc.
Qualitative and quantitative refer to how you use the data. Even with purely nominal data, quantitative studies can be performed.

Also, the lessons and quizzes create confusion with respect to the handling of sample data (i.e., experiment vs. observation). In the unit test, there are several multiple choice answers that list (a) sampling, (b) experiment, (c) observation, when these are not treated equally in the lessons. In the lessons, "experiment" and "observation" are treated as subordinate to samples, at least at the early location.
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(1 vote)
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Borrego, Xeno
Posted 4 years ago. Direct link to Borrego, Xeno's post “There are some questions ...”
There are some questions i did not under stand like the Random,Systematic,Stratified,and cluster questions
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(1 vote)
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genesis.sanchezgil
Posted a year ago. Direct link to genesis.sanchezgil's post “Disgusting left overs?😭�...”
Disgusting left overs?😭🤣
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(1 vote)
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Addison Alford
Posted 7 years ago. Direct link to Addison Alford's post “This survey was super eas...”
This survey was super easy
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(0 votes)
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Lapatrick
Posted 5 years ago. Direct link to Lapatrick's post “why was the cluster one h...”
why was the cluster one hard to get
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(0 votes)
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