The mean price goes between $ 41.16 and $ 42.84, so a value of $ 48 is unusually high.
Since the average price of an item is $ 42 with a standard deviation of $ 3, to find a 98% confidence interval about the mean, and determine if a value of X = 48 is unusually high or if it is normal, the following calculations should be done:
- (((42 - 3) + (42 + 3)) / 2) x 0.98 = X
- ((39 + 45) / 2) x 0.98 = X
- 42 x 0.98 = X
- 41.16 = X
- (((42 - 3) + (42 + 3)) / 2) x 1.02 = X
- ((39 + 45) / 2) x 1.02 = X
- 42 x 1.02 = X
- 42.84 = X
Therefore, as the mean price goes between $ 41.16 and $ 42.84, a value of $ 48 is unusually high.
Learn more about maths in brainly.com/question/25908442
Answer:
-72
Step-by-step explanation:
(-4)(-9)(-2)=
36(-2)=
-72
N=1/5 I think i had this question before.
Answer:
1a: 1,000,000
2a: 1
3a: 6
4a: 0
5a: 1
6a: 1
7a: 9
1b: 1
2b: 1
3b: 1
4b: 1
5b: 1
6b:49
7b: 1
Step-by-step explanation:
Answer:
x=2; the extraneous root x=42.
All the details are in the attached picture, the answer is marked with red colour.
