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Charra [1.4K]
3 years ago
12

Can you help with a math problem

Mathematics
1 answer:
qaws [65]3 years ago
5 0
I believe that they are both the first answer because when the sign has a line under it, it is darken in the circle
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A simple random sample of 100 batteries is selected from a process that produces batteries with a mean lifetime of 32 hours and
Brrunno [24]

Answer:

.b. It is one‐half as large as when n = 100.

Step-by-step explanation:

Given that a  simple random sample of 100 batteries is selected from a process that produces batteries with a mean lifetime of 32 hours and a standard deviation of 3 hours.

i.e. s = 0.3

we obtain se of sample by dividing std devitation by the square root of sample size

i.e. s= \frac{3}{\sqrt{n} }

when n =100 this = 0.3 and

when n =400 this equals 0.15

We find that when sample size is four times as large as original, std deviation becomes 1/2 of the original

Correction option is

.b. It is one‐half as large as when n = 100.

7 0
3 years ago
An oil company fills 1 over 12 of a tank in 1 over 3 hour. At this rate, which expression can be used to determine how long will
IrinaK [193]

Answer:

(1/3)x12 hrs

Step-by-step explanation:

5 0
3 years ago
What is the slope of the line passing through the points (5, 3) and (5, -9)? *
Mars2501 [29]

Answer:

Slope is 0

Step-by-step explanation: x stood the same so therefore the slope is 0 or infinite

4 0
3 years ago
A courier originally had 5 packages to deliver. Suppose x represents the number of packages she has delivered so far and y repre
Olenka [21]

Answer:

A,E,F

Step-by-step explanation:

5 0
3 years ago
Expand and simplify 3(3x - 4) - 2(2x - 1)
bogdanovich [222]

Answer:

5x-10

Step-by-step explanation:

expand to 9x-12-4x+2

collect like terms.

5x-10

4 0
1 year ago
Read 2 more answers
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