Answer: The sample mean ![(\overline{x}) = 517](https://tex.z-dn.net/?f=%28%5Coverline%7Bx%7D%29%20%3D%20517)
Step-by-step explanation:
The confidence interval is given by :-
Sample mean ± Margin of error
Given : The scores on a standardized test are normally distributed. If a random sample of standardized test scores is taken and the confidence interval is (497,537).
i.e. Sample mean - Margin of error = 497 ..(i)
Sample mean + Margin of error=537 ..(ii)
Adding (1) and (2), we get
2 (Sample mean) = 1034
⇒Sample mean = 517
Hence, the sample mean ![(\overline{x}) = 517](https://tex.z-dn.net/?f=%28%5Coverline%7Bx%7D%29%20%3D%20517)
Answer:
A
Step-by-step explanation:
If angle a is less then 90 then it’s acute
The equation has exactly 1 real solution.
You can find this by solving it.
8 - 4x = 0 ----> add 4x to both sides
8 = 4x ----> divide both sides by 4
2 = x
You can see there is only 1 and therefore it has one solution.
Answer:
3 : 15 : 2
Step-by-step explanation:
Let cranberry juice = x,
3/4 + 1/10 + x = 1
x = 3/20
Ratio = cranberry : apple : orange
= 3/20 : 3/4 : 1/10
= 3 : 15 : 2 (Times everything with 20)