Factor this trinomial completely.
1 answer:
You might be interested in
Answer:
-332.86 < µ1 - µ2 < -141.14
Step-by-step explanation:
We will be constructing a 99% confidence interval for a difference of means.
We have 2 samples sizes
Sample 1: (freshmen)
n = 10
x = 1023
s = 68
Sample 2: (sophomores)
n = 14
x = 1257
s = 338
We are to assume normality, but the equality in the population variances. This determines the formula we will use. For this situation, we use t-distribution to find the error, and our degrees of freedom are one less than the size of the smallest sample. In this case, 9 degrees of freedom.
Our t-value is: 3.25
*See attached photo for the construction of the confidence interval
1. If Sheryl works 6.5 hours in a day, she makes approximately 85 currency.
2A. If Sherly had not worked for a single hour, she would get no money.
If she worked for 1 hour, here wage would approximately be equal to 13 currency.
If Sheryl works 9 hours she will make approximately 117 currency.
Step-by-step explanation:
Step 1:
To calculate how much Sheryl makes if she works 6.5 hours a day, we check the graph to see what the y value of the graph is when .
When , the line falls on
So if Sheryl works 6.5 hours in a day, she makes approximately 85 currency.
Step 2:
The two points on the graph are at (0, 0) and (1, 13).
This means that if Sherly had not worked for a single hour, she would get no money.
If she worked for 1 hour, here wage would approximately be equal to 13 currency.
These two statements explain the two points on the graph.
Step 3:
To calculate how much Sheryl makes if she works 9 hours, we must create an equation that represents how much money she makes.
If she earns approximately 13 currency an hour, her wage is , where x is the number of hours worked and y is the wage.
When ,
So if Sheryl works 9 hours she will make approximately 117 currency.