Chelsea wants to determine the number of people in her school who read news reports on the internet daily. she asks five people in her language arts class. which improvements could chelsea make to her sample to increase the validity of the results? check all that apply.
increase the sample size
choose students from different grade levels
choose every fourth student in all language arts classes
decrease the sample size
choose students whose answer to the survey question is predetermined

Increase the sample size and choose students from different grade levels are definitely two of the answer you should pick. Hope this helps!

Chelsea wants to determine the number of people in her school who read news reports on the Internet daily.

She asks five people in her language arts class.

The following things she should do to increase the validity of the results:

1 - increase the sample size - Her sample size is very low. Only 5 students cannot represent the whole population.

2 - choose students from different grade levels - She is choosing only her classmates, but she should choose students from all grades randomly.

3 - choose every fourth student in all language arts classes - This will help her access the results in a better way as the population will increase.

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.