SAT scores (out of 1600) are distributed normally with a mean of 1100 and a standard deviation of 200. Suppose a school council
1 answer:
You might be interested in
Answer:
The total length of the Dogwood Trail is 24 kilometers
The difference between the lengths of the trails is 6 kilometers
Step-by-step explanation:
<u><em>The complete and correct question is</em></u>
The diagram shows two different nature trails in a state park. The solid line shows the Dogwood Trail. The dashed line shows the Elm Trail.
Which of the following statements are true about the lengths of the trails? Check all that apply.
1.The total length of the Dogwood Trail is 16 kilometers.
2.The total length of the Dogwood Trail is 24 kilometers.
3.The Elm Trail is longer than the Dogwood Trail.
4.The difference between the lengths of the trails is 2 kilometers.
5.The difference between the lengths of the trails is 6 kilometers.
<u><em>The picture in the attached figure</em></u>
step 1
Find the value of a
Applying the Pythagorean Theorem in the right triangle ABC
step 2
Find the value of b
Applying the Pythagorean Theorem in the right triangle CDE
step 3
Find the total length of the Dogwood Trail (solid blue line)
The total length is equal to
---> by segment addition postulate
substitute the given values
substitute the value of a and b
step 4
Find the total length of the Elm Trail (dashed red line)
The total length is equal to
---> by segment addition postulate
substitute the given values
<u><em>Verify the following statements</em></u>
Part 1) The total length of the Dogwood Trail is 16 kilometers
The statement is false
Because
The total length of the Dogwood Trail is 24 kilometers (see the explanation)
Part 2) The total length of the Dogwood Trail is 24 kilometers
The statement is true (see the explanation)
Part 3) The Elm Trail is longer than the Dogwood Trail
The statement is false
Because
The Elm Trail is smaller than the Dogwood Trail
Part 4) The difference between the lengths of the trails is 2 kilometers
The statement is false
Because
The difference is equal to
Part 5) The difference between the lengths of the trails is 6 kilometers
The statement is true
Because
The difference is equal to
Answer:
Step-by-step explanation:
Since we're finding the product, we have to multiply:
×
You can simplify in this stage by using the "butterfly method", and dividing by
, and
by
, you'd then have:
×
Multiply the numerators and the denominators to get:
~
If you prefer the longer way, again, multiply:
×
Multiply the numerators and the denominators:
Simplify the fraction by dividing both the numerator and denominator by :
Answer:
Check the explanation
Step-by-step explanation:
Open file in excel.
Click on Data->Data Analysis and select Regression.
Enter wait time data range in y-variable.
Enter Duration data range in x-variable.
Click ok.
From above output:
#1 The equation of the linear regression line is:
A 95% confidence interval for the slope of the regression line is:
In excel, ise formula =FORECAST(6,wait time data range, duration data range) and press enter. The wait time between eruptions following a 6 minute eruption is
Since (for F test) , we can conclude that there is a statistically significant linear relationship between the duration of the eruptions and the wait time between eruptions.
The correct null and alternative hypotheses for this analysis:
Kindly check the output below
