The management of a department store is interested to estimate the difference in the amount of money spent by female and

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The management of a department store is interested to
estimate the difference in the amount of money spent by female and
male shoppers. You are given the following
information                                                                                           
Female Shoppers
Male Shoppers
Sample size
64
49
Sample mean
140
125
Population standard deviation
10
8
what is the value of the test statistic for the
difference mean between male shoppers and female shoppers assuming
the standard deviations are known?
Hint: difference between two mean population assume
S.D are Known.
A.
none
B.
Z= 8.86
C.
T= 8.86
D.
Chi-square = 8.86
E.
F= 8.86