Find the z-score corresponding to a score of X= 40 and the X
value corresponding to z = 0.25 for each of the following
distributions.
a. μ = 50 and σ = 20
b. μ = 50 and σ = 4
c. μ = 30 and σ = 8
d. μ = 30 and σ = 4
Find the value of the probability of the standard normal
variable Z corresponding to the shaded area under the standard
normal curve. (Round your answer to four decimal places. You may
need to use the appropriate table in the Appendix of Tables to
answer this question.) P(0.2 < Z < 1.83) = ?
Find the value of the probability of the standard normal random
variable Z corresponding to this area. (Round your answer to four
decimal places.) P(−1.68 < Z < 1.23) =?
Calculate the z scores, then use the z table. please show work
and explain Based on the Normal model N (100, 16) describing IQ
scores from Exercise 24, what percent of applicants would you
expect to have scores a) over 80? b) under 90? c) between 112 and
132? d) over 125?
Calculate the z scores based on the probabilities, then back out
the x values. please show work and explain Based on the model
N(0.062, 0.018) for quarterly returns...
Using the z table (The Standard Normal Distribution Table), find
the critical value (or values) for the two-tailed test with
a=0.05
. Round to two decimal places, and enter the answers separated
by a comma if needed.
A) Find the z-score corresponding to the given area. Remember, z
is distributed as the standard normal distribution with mean of μ =
0 and standard deviation σ = 1. Round to two decimals, if
necessary.
The area to the left of z is 10%. z = The area to the right of z
is 50%. z =
The area to the left of z is 55%. z = The area to the right of z
is 5%. z =...
5. Find the probability for the following
A. What is the probability if z value is at least 2 (z=2 and
more)?
B. What is the probability if z value is maximum 2 (z=2 and
less)?
C. What is the probability if z value is between -2 and
+1.25?