Answer:
The null and alternative hypotheses are:
Under the null hypothesis, the test statistic is:
Where:
is the sample mean
is the sample standard deviation
is the sample size
Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:
Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.
Answer: Weight of Charles = 177.5 pounds
Weight of dos = 22.5 pounds.
Step-by-step explanation:
Let x = Weight of Charles
y = Weight of dog.
As per given , we have the following system of linear equation :
We can write (ii) as :
Subtract equation (iii) from (i) , we get
Put this value in (1) , we get
Hence , Weight of Charles = 177.5 pounds
Weight of dos = 22.5 pounds.
There are 150 children in the after school club. 15 = 10%, 30 = 20%, 45 = 30%, etc.
Let's find the unit rates and compare. The hardware store's one is already given, so we only need to find the one for the stand.
85/4 = 0.2125
0.2125 > 0.19
You would want to buy at the store. Hope this helps!
In the given question there
are certain information’s based on which the answer to the question can be
easily reached.
Let us assume that the distance ran by Adam = x
The the distance ran by Julio = (x - 17) miles
It is also given that Julio had run 13 miles
The we can create an equation and that is
x - 17 = 13
x = 13 + 17
= 30
So Adam ran a distance of 30 miles.