SL A&I last lesson

Which type of sampling is 'interviewing every 10th student who enters the school on the morning'

• simple random

• quota

• systematic

• convenience

Testing at a 5% significance level, what are the correct rejection inequalities

You have just done a linear regression to find Pearson's correlation coefficient of r = 0.89. What is your conclusion?

• the variables show strong, positive correlation

• the variables show moderate, positive correlation

• the variables show strong, positive linear correlation

• the variables show strong linear correlation

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She picks the closest boy and the closest 4 girls.

What type of sampling is it?

• Simple random

• Systematic

• Quota

• Convenience

• Reject H0 and accept H1

• Accept H1 and reject H0

• We need to know the p value

The exam question is a t-test...what is the assumption you are making about the data?

• It's independent

• It's normally distributed

• It's binomially distributed

• It's correlated

The exam question is a t-test...which test on you calculator do you use?

• Z test

• T test

• 2-sampZtest

• 2-sampTtest

Your exam question is about an investment compounded quarterly for 5 years. What value of N do you put in the finance app?

• 5

• 60

• 15

• 20

You've cleared your calculator memory to show the invigilator...you've sat down in the exam hall...what do you now do?

• Switch from radians to degrees

• Put Stat Diagnostics On

• Put Stat Diagnostics Off

• Put Pooled to YES on 2-sampTtest