Question

In tilton school there are 380 students in key stage 3 240 students in key stage 4 110 students in key stage 5 Phoebe is carrying out of a survey she needs a sample of 100 students stratified by key stage work out the number of students from keystage 3 there should be in the sample.

Answer 1

Answer:

79

Step-by-step explanation:

Answer 2

Answer:

52

Step-by-step explanation:

dd the 3 stages for the total number of students:

380 + 240 + 110 = 730 total students.

The fraction of students in Key Stage 3 = 380 / 730

She needs a sample of 100, so multiply the fraction of Stage 3 by the sample rate:

380/730 x 100 = 52.05 people.

Since you cannot have 0.05 of a person, depending on how your teacher wants you to round you could have either 52 or 53 people.