Question

What minimum Z score does a student need to get to be ranked in the top 1% of her/his class? (Use the Z table) O around 0.25 O around 2.33 O between 3.5 and 4.0 O around 1 Question 15 1 pts A sample was collected to test a hypothesis. What does it mean when the null hypothesis was rejected at alpha level of.01? O The probability was less than .01 that a sample like this could have been obained when he null hypothesis was false. O The probability was more than.01 that a sample like this could have been obtained when the nul hypothesis was true O The probability was more than.01 that a sample like this could have been obained when he nuil hypothesis was false. O The probability was less than .01 that a sample like this could have been obained when he nuil hypothesis was true

Answer 1

1: Here z score will be

P(Z>z) = 0.01

1-p(Z<z) = 0.01 => p(Z<z) = 0.99

So... Z score will be 2.33

I. E. Option B is correct answer

2: when null hypothesis was rejected at aplha level of 0.01

Mean the probability was less than 0.01 that a sample like this could have been obtained when the null hypothesis was false

Option A is correct..