Q1) Mean score of adult men on psychological test that measures "masculine stereotypes" is 4.88. A researcher studying hotel managers suspects that successful managers score higher than adult men in general. A random sample of 48 managers of large hotels has mean  X‾= 5.91. The null hypothesis for the researcher's test is

Select one answer.

a) H0: μ = 4.88

b) μ > 4.88

c) H0: μ = 5.91

d) H0: μ > 5.91

Q2) Mean score of adult men on psychological test that measures "masculine stereotypes" is 4.88. Researcher examining hotel managers suspects that successful managers score higher than adult men in general. A random sample of 48 managers of large hotels has mean X‾  = 5.91. Researcher's alternative hypothesis  is

Select one answer

a) Ha: μ ≠ 5.91

b) Ha: μ ≠ 4.88

c) Ha: μ > 5.91

d) Ha: μ > 4.88

Q3) Mean score of adult men on psychological test that measures "masculine stereotypes" is 4.88. Researcher studying hotel managers suspects that successful managers score higher than adult men in general. Random sample of 48 managers of large hotels has meanXbar = 5.91. Assume that scores of hotel managers on psychological test are Normal with standard deviation σ = 0.79.  Value of the z statistic for the researcher's test is

Select one answer

a) z=1.30         

b) z=-1.30       

c) z=9.03         

d) z=1.03