Question

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?



Alex sent a questionnaire by email instead of going door to door.



Alex sent the questionnaire only to those who live near her.



Not everyone who got the questionnaire responded.



Those who got the questionnaire may not have responded on time.
@KJSaif

Answer 1

option 2

Answer 2

she send emails to people in her neighbourhood only, thats why it is biased

Answer 3

@jango_IN_DTOWN Is right it's B

Answer 4

Amelia is conducting a survey among people who travel to work using the public transportation system in her city. She wants to know how much time people spend using public transportation. She selected three samples for her study.

Sample 1: 12 random members of the population who drive to work

Sample 2: 12 random people who use public transportation to get to work

Sample 3: 12 random people who drive to work and take public transportation on alternate days

Which sample is most likely to give a valid generalization? Which is least likely to give a valid generalization?



The sample that is most likely to give a valid generalization is sample 1 sample 2 sample 3 .
The sample that is least likely to give a valid generalization is sample 1 sample 2 sample 3 @jango_IN_DTOWN @KJSaif

Answer 5

Sample 1 :)

Answer 6

Sample 1: 12 random members of the population who drive to work

Answer 7

It's Sample 2 Actually.

Answer 8

@DallasCowboys88 No

Answer 9

It said LEAST for second

Answer 10

Mrs. Hampton’s class is studying the feeding habits of captive turtles in the community. Which of these samples represents the best random sample for the study?



some turtles at the local reptile zoo and some turtles kept as pets



all the turtles found in science classrooms at the school



every other turtle the class finds in the pond behind their school



every third turtle that appears on the beach near the lake

Answer 11

your right with first and im right with second

Answer 12

its the first one.hmm what do you thinK? @KJSaif

Answer 13

If i had to choose It would most likely be option 1 because it will best test the feeding habits

Answer 14

Pamela wants to learn more about the career preferences of students in her school. She interviews a number of students from the advanced science classes. Why is this sample likely to be biased?



Advanced science students may not have clear career preferences.



The numbers of boys and girls in the advanced science classes are not equal.



Advanced science students are not representative of all the students in the school.



It is too early for students to have career preferences while still in school.

Answer 15

yup i agree with you both

Answer 16

its C right?

Answer 17

That's what i would go with @ovidia

Answer 18

Of the 35 jewelers in her town, Naomi polled the 5 biggest to learn about the latest jewelry trends. Her sample is biased not biased . The sample is representative not representative of the jewelers in Naomi’s town.
@KJSaif

Answer 19

hmmmmm........................................@DallasCowboys88 what do you think?

Answer 20

not biased and representative

Answer 21

@DallasCowboys88

Answer 22

not biased and representative @ovidia

Answer 23

To find the average grades scored by students in science and math, the principal of a school sends a questionnaire to the top five students in each grade of the high school. Is the sample used by the principal random? Will a generalization from this sample be valid?



The sample used by the principal is random not random . A generalization made from this sample is valid not valid . @KJSaif

Answer 24

It's not random and not valid for grade scores

Answer 25

thank you @KJSaif @DallasCowboys88

Answer 26

your welcome @ovidia what did you get?