Answer:
Option D. We are 95% confident that the mean amount spent on electric service among the 160 households is between $151 and $216.
Explanation:
A confidence interval is a range of values, derived from the sample statistics, which may include the value of an unknown population parameter.
A 95% confidence interval indicates that between 152 of 160 samples (95%) of the same population will produce confidence intervals that will contain the population parameter.
It also means that we have a 95% confidence that the average (average amount) is among the resulting amounts obtained.
Logically, option "D" is missing the final part. This would be: D. We are 95% confident that the mean amount spent on electric service among the 160 households is between $ 15.
This is the only true option, since the test is based on a sample of only 160 households, the entire population of households cannot be included.
Hence, the correct option is:
Option D. We are 95% confident that the mean amount spent on electric service among the 160 households is between $151 and $216.
The correct answer is negative cash flow.
When a company has a situation where their revenue is less than their operating expenses they have a negative cash flow. This is normally indicative that a company is not doing well and may need to make changes in order to become profitable.
Answer:
Variable cost per unit= $0.10
Explanation:
Giving the following information:
Cost Machine Hours
March $3,106 15,176
April 2,668 9,558
May 2,892 11,947
June 3,538 17,899
<u>To calculate the variable cost under the high-low method, we need to use the following formula:</u>
Variable cost per unit= (Highest activity cost - Lowest activity cost)/ (Highest activity units - Lowest activity units)
Variable cost per unit= (3,583 - 2,668) / (17,899 - 9,558)
Variable cost per unit= $0.10