8×12=96. Katie
12×12=144. Mary
you have to Divide Katie's 96 by 8 to get 12
then take Mary's 12 and multiply it by 12 to get the answer of 144 apps that Mary owns
5 1/4? Im not sure what the question is asking but whatever
Answer:
The solution to this equation could not be determined.
Step-by-step explanation:
Simplifying
a(c + -1b) = d
Reorder the terms:
a(-1b + c) = d
(-1b * a + c * a) = d
(-1ab + ac) = d
Solving
-1ab + ac = d
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Combine like terms: d + -1d = 0
-1ab + ac + -1d = 0
The solution to this equation could not be determined.
Answer: a. 1.981 < μ < 2.18
b. Yes.
Step-by-step explanation:
A. For this sample, we will use t-distribution because we're estimating the standard deviation, i.e., we are calculating the standard deviation, and the sample is small, n = 12.
First, we calculate mean of the sample:


2.08
Now, we estimate standard deviation:


s = 0.1564
For t-score, we need to determine degree of freedom and
:
df = 12 - 1
df = 11
= 1 - 0.95
α = 0.05
0.025
Then, t-score is
= 2.201
The interval will be
± 
2.08 ± 
2.08 ± 0.099
The 95% two-sided CI on the mean is 1.981 < μ < 2.18.
B. We are 95% confident that the true population mean for this clinic is between 1.981 and 2.18. Since the mean number performed by all clinics has been 1.95, and this mean is less than the interval, there is evidence that this particular clinic performs more scans than the overall system average.