1st answer could probably be C
2nd answer could probably be D
3rd answer could probably be ( A)
4th is ( D)
* sorry if wrong *
Answer:
Step-by-step explanation:
From the information given:
mean life span of a brand of automobile = 35,000
standard deviation of a brand of automobile = 2250 miles.
the z-score that corresponds to each life span are as follows.
the standard z- score formula is:
For x = 34000
z = −0.4444
For x = 37000
z = 0.8889
For x = 3000
z = -2.222
From the above z- score that corresponds to their life span; it is glaring that the tire with the life span 30,000 miles has an unusually short life span.
For x = 30,500
z = -2
P(z) = P(-2)
Using excel function (=NORMDIST -2)
P(z) = 0.022750132
P(z) = 2.28th percentile
For x = 37250
z = 1
Using excel function (=NORMDIST 1)
P(z) = 0.841344746
P(z) = 84.14th percentile
For x = 35000
z = 0
Using excel function (=NORMDIST 0)
P(z) = 0.5
P(z) = 50th percentile
Answer:
The conclusions apply only to the sample.
Step-by-step explanation:
Since the sample size is small, it's not likely to be representative of any larger population.
I hope this helps!
Answer: 3,4 and they all have easy slopes just look at ends of arrows
Step-by-step explanation:
No it is not reasonable, since 9 isn't an even number, and what determines if it is an even number, is the value in the ones place.