Question

Mark wants to know how many families in his neighborhood plan to attend the neighborhood party. He puts all 80 of the neighborhood addresses in a hat and draws a random sample of 20 addresses. He then asks those families if they plan to attend the party. He finds that 20% of the families plan to attend the party. He claims that 20% of the neighborhood families would be expected to attend the party. Is this a valid inference?


plzzzzzzzzzzzzzzzzzzzzzz help

Answer 1

@ganeshie8

Answer 2

@BrandonR

Answer 3

@prowrestler

Answer 4

@saseal

Answer 5

nope its not

Answer 6

2/8 * 100% is 25%

Answer 7

plans to attend doesnt mean they would come

Answer 8

No, this is not a valid inference because he asked only 20 families
No, this is not a valid inference because he did not take a random sample of the neighborhood
Yes, this is a valid inference because he took a random sample of the neighborhood
Yes, this is a valid inference because the 20 families speak for the whole neighborhood

Answer 9

would it be C

Answer 10

1st one

Answer 11

oh i was wrong

Answer 12

thanks

Answer 13

yw

Answer 14

can u help with one more

Answer 15

ok

Answer 16

Carla wants to know how many students in her school enjoy watching reality TV shows. She asks all 22 students in her science class and finds that 40% of her classmates enjoy watching reality TV shows. She claims that 40% of the school's student population would be expected to enjoy watching reality TV shows. Is Carla making a valid inference about her population?

Answer 17

she cant take her class's preference to represent the school's

Answer 18

about her population?

No, it is not a valid inference because her classmates do not make up a random sample of the students in the school
No, it is not a valid inference because she asked all 22 students in her science class instead of taking a sample of the students in her school
Yes, it is a valid inference because she asked all 22 students in her science class
Yes, it is a valid inference because her classmates make up a random sample of the students in the school

Answer 19

so A

Answer 20

yea

Answer 21

thx