Question

3. If a certain data value is 0.56 standard deviations below the mean, what is the z-score?

4. Find the area under the standard normal curve between

z =-1.33
and
z = 2.20.

5. Find a z-score such that 11% of the area under the curve is to the right of z.

Answer 1

Answer:

Given that:

3. If a certain data value is 0.56 standard deviations below the mean, what is the z-score?

0.56 standard deviation below the mean

negative z-score is below the mean and positive z-score above the mean

z-score =-0.56

4. Find the area under the standard normal curve between z =-1.33 and z = 2.20.

P (−1.33<Z<2.20 )

By using standard normal table

P (−1.33<Z<2.20 )=0.8943