1. Assuming the sales total per transaction at Kroger is nearly
normal with N(125,23), what proportion of sales falls below
100?
a. 0.1379
b. 0.2578
c. 0.5516
d. 0.8621
2. Find V(x) for binomial(50, 0.2) where µ = 10 and σ =
2.15.
a. 0.20
b. 2.15
c. 4.62
d. 10
3. The company executives at Company XYZ, believe that only 40%
of their 10,000 employees are extremely satisfied with their jobs
and have been working to improve this value. Therefore, they just
surveyed 200 employees which indicated that 90 employees were
extremely happy working for Company XYZ. What is the
null hypothesis of extremely happy employees?
a. H0: p = 0.40
b. H0: p = 0.45
c. H0: p = 0.90
d. H0: p ≠0.45
