We also know that a z score of 1.28 cuts off the upper 10%. We simply need to convert z = 1.28 to a raw score.
As a decimal, the top 10% of marks would be those marks above 0.9 (i.e., 100% - 90% = 10% or 1 - 0.9 = 0.1). First, we should convert our frequency distribution into a standard normal distribution as discussed in the opening paragraphs of this guide.
Answers & Comments
Answer:
Letter B. z=1.28
Step-by-step explanation:
We also know that a z score of 1.28 cuts off the upper 10%. We simply need to convert z = 1.28 to a raw score.
As a decimal, the top 10% of marks would be those marks above 0.9 (i.e., 100% - 90% = 10% or 1 - 0.9 = 0.1). First, we should convert our frequency distribution into a standard normal distribution as discussed in the opening paragraphs of this guide.
Answer:
c po
Step-by-step explanation:
pa brainlist plssssss