Answer:
Step-by-step explanation:
Let X be the length of time between billing dates and checks received and deposited for non-delinquent accounts of an oil company’s monthly credit card customers
X has mean 13.5 and sigma 3 days
Sample size = n =36, x bar = 13
(One tailed test at 0.025 sign. level)
Mean diff = -0.5
Since sigma is known z test can be used
Std error =
Z statistic = -0.5/SE= -0.1
p value = 0.920
p>0.025 hence accept null hypothesis.
My conclusion is there is no statistical evidence that lock box reduced the mean time.
C) 90, similar shapes maintain angle measures, and are a fraction of a size of the original shape. (A ratio if you will.)
Here’s the answer, hope this helps :)
So if 20% of his pin code was 246.8, then we want to know 5 times that since 20% * 5 = 100%.
So 246.8 * 5 = 1234
So his pin was 1234.
he saves $860 per month
calculate each of his outgoings
rent = × $3600 = = $900
food = × $3600 = = $1440
activities = × $3600 = = $400
savings = $3600 - ( 900 + 1440 + 400 ) = $860