Question

A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unusual.

–1.90; not unusual
1.90; not unusual
1.90; unusual
–1.90; unusual

Answer 1

@AlexandervonHumboldt2

Answer 2

@MrNood

Answer 3

@jim_thompson5910

Answer 4

Given a distribution of test scores with mean 69 and standard deviation of 10, find the z score corresponding to a raw score of 50.

What would you do first?

Answer 5

i'm not sure how to start it. Can you help me?

Answer 6

ok.

Answer 7

For now I ask you to take my word for this: You can roughly divide the area under each of the 2 sides of this normal curve into four more or less equal areas:

Answer 8

ok. how do i do that