Answer:
Step-by-step explanation:
Tthe population is normally distributed and the sample size is .
Since the population standard deviation is unknown and the sample standard deviation , must replace it, the t distribution must be used for the confidence interval.
Hence with degrees of freedom of 21, .(Read from the t distribution table)
The 98% confidence interval can be constructed using the formula:
.
From the question the sample mean is dollars and the sample standard deviation is dollars.
We substitute the values into the formula to get
Therefore, we can be 98% confident that the population mean is between is between 19.22 and 44.78 dollars.
It simplifies to 52/25 not 26/25 and it depends on wht ur teacher wants weather she wants it as a improper fraction or not
37/11 is correct just multiply 3*11 and add four
Answer:
m= 3/7
Step-by-step explanation:
I'm assuming the question is solve for the variable, m.
First step is to isolate the variable
In other words, let's move everything (but m) from the left side to the right side
To move 7 to the right side, we can either divide both sides by 7 or multiply both sides by 1/7 (both equal the same thing)
7/3m × 1/7 = 1 × 1/7
1/3m = 1/7
Now we must move 1/3 from the left to the right side
We can use the reciprocal, 3/1, to do this
1/3m × 3/1 = 1/7 × 3/1
m = 3/7
if your trying to find the slope then the slope is 3