Answer:
10 shares.
Step-by-step explanation:
So first you need to right yourself an equation to help you solve this
so it cost $67.50 with 60 shares.
so let x be the shares
67.50x=675.00
divide 67.50 by 675.00 and then you should get your answer of 10 shares.
the answer therefore is 10 shares.
Answer: 2.5 hours
Step-by-step explanation:
Answer:


Step-by-step explanation:
Given

Solving (a): The mean of the 6 samples.
This is calculated as:

So, we have:



Solving (b): The sample standard deviation.
This is calculated using:

So, we have:




Answer:
Step-by-step explanation: 25÷ 12545.5 = 5,018.20
Answer:
The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).
Critical value t=1.318
Step-by-step explanation:
We have to calculate a 80% confidence interval for the mean.
The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.
The sample mean is M=0.165.
The sample size is N=25.
When σ is not known, s divided by the square root of N is used as an estimate of σM:

The degrees of freedom for this sample size are:

The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.
The margin of error (MOE) can be calculated as:
Then, the lower and upper bounds of the confidence interval are:

The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).