In her book Red Ink Behaviors , Jean Hollands reports on the assessment of leadi
ID: 3206552 • Letter: I
Question
In her book Red Ink Behaviors, Jean Hollands reports on the assessment of leading Silicon Valley companies regarding a manager's lost time due to inappropriate behavior of employees. Consider the following independent random variables. The first variable x1 measures manager's hours per week lost due to hot tempers, flaming e-mails, and general unproductive tensions.
The variable x2 measures manager's hours per week lost due to disputes regarding technical workers' superior attitudes that their colleagues are "dumb and dispensable".
What is the value of the sample test statistic? (Test the difference 1 2. Do not use rounded values. Round your final answer to three decimal places.)
x1: 3 10 3 2 2 4 10Explanation / Answer
Given that,
mean(x)=4.8571
standard deviation , 1 =3.579
number(n1)=7
y(mean)=6.5
standard deviation, 2 =3.0237
number(n2)=8
null, Ho: u1 = u2
alternate, H1: 1 != u2
level of significance, = 0.1
from standard normal table, two tailed z /2 =1.645
since our test is two-tailed
reject Ho, if zo < -1.645 OR if zo > 1.645
we use test statistic (z) = (x-y)/sqrt(s.d1^2/n1)+(s.d2^2/n2)
zo=4.8571-6.5/sqrt((12.80924/7)+(9.14276/8))
zo =-0.95