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sashaice [31]
3 years ago
14

Demonstrate how repeated subtraction can be used to show that 22 dividend by 7 = 3 r 1

Mathematics
1 answer:
Rudik [331]3 years ago
6 0
22-7-7-7=1 this will show that you can subtract 7 three times from 22 and have a remainder of 1.
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<h2><u>Answer with explanation</u>:</h2>

Let \mu be the average life of light bulbs.

As per given , we have

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Since H_a is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.

Formula for Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

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[We reject the null hypothesis when critical value is less than the test statistic value .]

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