Johnny uses 2-inch square tile to make a square, as shown below. What is the perimeter of Johnny's square? there are 3 2-inch ti
1 answer:
You might be interested in
Answer:
The p-value of the test is of 0.3219 > 0.05, which means that at , the average age is not higher than originally believed.
Step-by-step explanation:
A recent study in a small city stated that the average age of robbery victims was 63.5 years. Test if the average age higher than originally believed.
At the null hypothesis, we test that the mean is the believed mean age of 63.5 years, that is:
At the alternate hypothesis, we test if this mean is higher, that is:
The test statistic is:
In which X is the sample mean, is the value tested at the null hypothesis, s is the standard deviation of the sample and n is the size of the sample.
63.5 is tested at the null hypothesis:
This means that
A random sample of 20 recent victims had a mean of 63.7 years and a standard deviation of 1.9 years.
This means that
Test statistic:
P-value of the test and decision:
The p-value of the test is the probability of finding a sample mean above 63.7, which is a right-tailed test, with t = 0.47 and 20 - 1 = 19 degrees of freedom.
With the help of a calculator, this probability is of 0.3219.
The p-value of the test is of 0.3219 > 0.05, which means that at , the average age is not higher than originally believed.
The linear function that models the total cost for x deliveries is:
-------------------
A linear function has the following format:
In which
- m is the slope, that is, the rate of change.
- b is the y-intercept, that is, the value of y when x = 0.
In this problem:
- Fixed cost of $9 per month,
.
- Cost of $2 for each delivery, thus
.
The function for the <u>total cost for x deliveries is:</u>
A similar problem is given at brainly.com/question/16270359
1.
2. Jenna bought 4 lbs of apples.
Step-by-step explanation:
Step 1:
If a value x is to be rooted to a value of a, it will be equal to the value of x with an exponential .
So .
In the question, .
Substituting these values in the equation we get,
Step 2:
Apples cost $2.75 per pound. Jenna paid $11 for apples.
To calculate how many pounds of apples Jenna bought, we divide the price for which apples were bought by the cost per pound.
The price for which apples were bought = $11.
The cost per pound = $2.75.
The number of pounds bought =
So Jenna bought 4 pounds of apples.