Question 1 options: Huma has a normal distribution of scores with a mean of 7 an

Question

Question 1 options:

Huma has a normal distribution of scores with a mean of 7 and a standard deviation of 2. Find the probability that a random score would be drawn between the score of 6 and 9.

Please place your answer in the form of a percentage with two decimal places and a percent sign at the end.

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Question 2 (1 point)

Question 2 options:

Lamar has a normal distribution of scores with a mean of 7 and a standard deviation of 2. Find the proportion of scores that lie between a score of 4 and a score of 8.

Please place your answer in the form of a percentage with two decimal places and a percent sign at the end.

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Question 3 (1 point)

Question 3 options:

What z score separates the highest 30% from the rest of the scores (from a normal distribution)?

Please place your answer in the form of a whole number with two decimal places.

Explanation / Answer

1)

2)

3)

for highest 30% ; z score =0.5244

therefore score =mean+z*std deviation =7+0.5244*2=8.05

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