Answer: The point estimate of the population mean and margin of error for the confidence interval is 22 and 6 respectively.
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where is the sample mean and E is the margin of error.
Given : Lower bound is 16 and upper bound is 28
Then, and
Adding both equations , we get
Put in first equation, we get
Hence, the point estimate of the population mean and margin of error for the confidence interval is 22 and 6 respectively.
Answer:
-7.5
Step-by-step explanation:
-4.2×-4.2 = 17.64
-132.3/17.64= -7.5
Answer:
10x=4
x=4/10
x=2/5
Step-by-step explanation:
Answer:
a movie, m is 3
a video game, v is 5.5
Brainliest would be really appreciated. (need it to unlock chat)
Feel free to ask further questions if you feel like it.
Till then, have a nice day
Step-by-step explanation:
I 5m+2v=26
II 3m+8v=53
I 5m+2v=26 devide by 2 on both sides
5/2m+v=13 subtract 5/2m om both sides
v=13-5/2m
Now put this whole thing in the other equation II, replacing the v there
3m+8(13-5/2m)=53 just calculate it
3m+104-20m=53
-17m+104=53 subtract 53 on both sides
-17m+51=0 add 17m on both sides
51=17m devide by 17
3=m
we found m, v is easy
now put m in an equation from the start, let's take equation I here
I 5m+2v=26
5*(3)+2v=26
15+2v=26 subtract 15 on both sides
2v = 11 devide by 2
v = 5.5
So we found m and v, prices for single items. we can proof this when we put m and v into a given equation and the if it equals a true value
m & v in II
II 3m+8v=53
3*(3)+8*(5.5)=53
9+44=53
53=53
Seems legit.
Answer:
A) 4
B) Mode is 5
C) 10.5
Step-by-step explanation:
A) 62+x/12
(62 + x) ÷ 12 = 5.5 ×12
62 + x = 66
×= 66-62
×=4
B) mode is the highest occuring no which is 5
C) mean has been given as 5.5; mean plus mode= 10.5