Solve the following problems:
Q1. Find a value, X0, such that µ = 160 and δ2 = 256
a)P(X < X0) = 0.16
b) P(X≤ X0) = 0.75
Q2. A sample of size n = 20 is randomly selected from a normal population with mean µ = 90 and standard deviation = 5. Find the following:-
a. P (x > 95) the x has a bar over the top on all of the problems a-d in this section
b. P (x < 93)
c. P (82 < x < 91)
d. P (x < 89)
Q3. Consider the following hypothesis test:
H0: µ = 5
Ha: µ = > 5
Assume the test statistics are as shown below. Compute the corresponding p-values and make the appropriate conclusions based on α = .05.
a. Z = 1.82 b. z = .45 c. z = 1.5
Q4. Consider the following hypothesis test.
H0:µ = 25
Ha:µ ≠25
A sample of 80 is used and the population standard deviation is 10. Use α = 0.05. Compute the value of the test statistic z and specify your conclusion for each of the following sample results.
a. X‾ = 22.0
b. X‾ = 24.0
c. X‾= 23.5
d. X‾ = 22.8