[IB Math SL] Exam Review: z-scores

[rtcodes]

x is x value, mew is mean, s is standard deviation :) for those wondering, like I did, she said it correctly ;)

[dimitarmanov]

Dear Cheshire,

You were very prone to leading me to failure, thank god ms.V🥰 helped me. Delete the video, you are spreading false information. Eradicate the wrong-doing !!

Best,
D.