I’m confused by the formula on question 1. I can’t find this working in my Kaplan book or on the Opentuition lectures.

Would it be possible to explain or point me in the direction of an explanation. I understand the consempt but just want to be able to remember the formula for the exam

gracestan says

I’m confused by the formula on question 1.

I can’t find this working in my Kaplan book or on the Opentuition lectures.

Would it be possible to explain or point me in the direction of an explanation. I understand the consempt but just want to be able to remember the formula for the exam

Sa276 says

Question 3 appears to be marking incorrectly.

It accepts answers between 7 and 7.1

The working it gives is :

std dev is sqrt of 9 = 3

49% z value is 2.33

VAR = 2.33 x 3

The answer, therefore, is 6.99 NOT between 7 and 7.1

abhijit9060 says

i need answers for this mock