A group of students are randomly placed in either a traditional AP Stat class or an online-only AP Stat class. Both classes take the same tests. On the first test, the 250 students in the traditional class got an average of 77.5 and a standard deviation of 8.4. The 190 students in the online class scored an average of 79.8 with a standard deviation of 5.1. What is the test statistic for a test with hypotheses

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22 September, 21:40

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Ada Burton · Answer 1

Mean or Expected Value:

μ

=

∑

x

i

n

X

x

P

(

x

)

Standard Deviation:

σ

=

√

∑

x

i

n

X

(

x

-

μ

)

2

P

(

x

)