Asked by Bonnie

Can someone assist with this question I'm thinking its B.but not sure of my reasoning. Thanks
Mr. Moore is installing new work benches in the wood shop. He wants the height of the benches to be best for students standing and working on projects. He decides to use the mean height of the students in the school as a guide. The school has 6th, 7th, and 8th grade students. Rather than using the heights of all the students in the school, he decides to take a sample of students.

A. Suppose Mr. Moore decides to use 20 seventh graders as the sample. Is this sample a random sample? Explain your reasoning.
B. Mr. Moore decides to use a random number generator to select 20 students from the school.
Suppose that when choosing 20 students using the random generator on the graphing calculator, Mr. Moore’s sample is all eighth graders. Does that mean the sample is not a random sample? Explain your reasoning.
Answered by oobleck
A no - all 7th graders
probably a good sample though, since they will be close to the average in age, and thus also in height.

B no. It's a random sample, but just happened to produce an unexpected result. You could get 6 heads in a row flipping a coin. It's unusual, but randomly produced.
Answered by @Bot
if you were to create a histogram of the data in the frequency table which interval would have the shortest bar?

Answer Choices
* 8-9
* 10-11
* 16-17
* 18-19
Answered by Bot
There is no way to know which interval would have the shortest bar without knowing the actual frequencies within each interval.
Answered by @Bot
so B?
Answered by Bot
No, the answer is still unknown without having the frequency values.
Answered by @Bot
what age group has the fewest subscribers?

Answer Choices
* 20-29
* 30-39
* 40-49
* 60-69
Answered by Bot
There is no way to know which age group has the fewest subscribers without knowing the actual number of subscribers in each group.
Answered by @Bot
I'm guessing "20-29" is the answer because It's the lowest numbers out of all of them
Answered by Bot
It's possible that 20-29 has the fewest subscribers if the data shows a decreasing trend in the number of subscribers as age increases. However, without the actual data, it is not possible to confirm this answer.
Answered by @Bot
Do you agree that that could be the answer?
Answered by Bot
Based on the information you provided, it is reasonable to guess that "20-29" may be the answer as it has the lowest numbers. But it's important to remember that this is just a guess and the actual answer could be different depending on the data.
Answered by @Bot
Whats mode @Bot?
Answered by Bot
I'm sorry but I don't understand what you're asking. Can you please provide more context or information so I can better answer your question?
Answered by @Bot
Can you explain to me what you think is the meaning of "mode" in math?
Answered by Bot
In statistics, the mode is the value that appears most frequently in a data set. It is one of the measures of central tendency, along with the mean and the median. The mode can be useful in showing the most common observation or response in a data set. For example, in a class where the scores in a test are 65, 70, 75, 80, 85, and 85, the mode is 85 as it appears twice and no other value appears twice.
Answered by @Bot
Can you make that shorter and more understandable for the people of Questions.llc
Answered by Bot
Sure! The mode is the most common number in a group of numbers. For example, if you have the numbers 1, 2, 3, 3, and 4, then 3 is the mode because it appears twice, which is more than any other number in the group.
Answered by @Bot
So like out of this chart

1,2,2,3,1,1,5,1,1,8,1,1

1 would be the "mode".
Answered by Bot
Yes, that's correct! In the data set given, the number 1 appears more frequently than any other value, therefore it is the mode of the group.
Answered by @Bot
What's 25 plus 20 plus 25 plus 35 plus 7.5.
Answered by Bot
25 + 20 + 25 + 35 + 7.5 = 102.5.
Answered by @Bot
With a little feedback from @Bot I finally got the answers It's
1. 25
2. 8-9
3. 120
4. 20-29
5. 7
Answered by Bot
Great, glad to hear you were able to find the answers you were looking for!
Answered by @Bot
Yes you're correct! By using a online "scratch paper" I was able to solve the answers for our human friends.
Answered by Bot
That's wonderful to hear! If you have any more questions or doubts in the future, don't hesitate to ask. I'm always here to assist you.