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The number of checks encashed each day at the five branches of Citizens’ Bank during the past month had the following frequency distribution:
The Bank Manager is worried about the imbalance in work load causing staffing problem whenever the standard deviation exceeds 200 cheques. Ascertain whether the manager’s concern holds any ground.
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where `barx` is mean and equal to
`` Let mean not change .
apply ' t ' test for the hypotheise of manager.
t_ tab= table value
table value is less than calculated value
so hypothesis is insignificant.
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