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My name is Ann [436]
3 years ago
8

A sample of 1100 computer chips revealed that 58% of the chips fail in the first 1000 hours of their use. The company's promotio

nal literature claimed that 61% fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.05 level to dispute the company's claim? State the null and alternative hypotheses for the above scenario.

Mathematics
1 answer:
marta [7]3 years ago
4 0

Answer:

Please see attachment

Step-by-step explanation:

Please see attachment

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gayaneshka [121]
The product would be -18
6 0
3 years ago
Read 2 more answers
Ken has a pole that is 26 inches long. He wishes to cut it into two pieces so that one piece will be 8 inches longer than the ot
Yuliya22 [10]

Answer:

9 inches

Step-by-step explanation:

Do the question algebraically, represented by this equation:

let x be the shorter piece

x + (x + 8) = 26                      (longer piece is 8 units longer)

Remove brackets

x + x + 8 = 26                 Combine like terms              

2x + 8 = 26                   Start isolating "x"

2x + 8 - 8 = 26 - 8           Subtract 8 from both sides

2x = 18

2x/2 = 18/2           Divide both sides by 2

x = 9                    shorter piece

The shorter piece would be 9 inches.

If you needed the longer piece too:

longer piece = x + 8

x + 8

= 9 + 8

= 17

The longer piece would be 17 inches.

Check your answer:

Longer + Shorter = 26           Substitute the lengths

17 + 9 = 26                    Add

26 = 26                same number

LS = RS                left side equals right side

The answer is correct.

3 0
3 years ago
What is the probability that in a class of 20 students, 2 of them will have the same birthday?
earnstyle [38]
There would be a 10% chance that they would have the same birthday
8 0
3 years ago
HELP ASAP. Dilation scale=2, center (5,4) <br> Graph the new points
frosja888 [35]

Answer:

3.5

Step-by-step explanation:

5 0
2 years ago
Hunter had seven gallons of water in the refrigerator. Of those, two and one-fourth gallons were spring water and one and one-fi
Crank

Answer:

3 11/20

Step-by-step explanation:

Total gallons of water=7

Spring water=two and one-fourth gallon=2 1/4

Filtered water=one and one-fifth

=1 1/5

Spring water+filtered water=2 1/4 + 1 1/5

=9/4+6/5

= 45+24/20

=69/20

=3 9/20

How many gallons of water were not spring or filtered

=Total gallons- (spring+ filtered water)

=7-69/20

=140-69/20

=71/20

=3 11/20

5 0
3 years ago
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