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Olegator [25]
3 years ago
8

121,580 rounded to the nearest fhousand

Mathematics
1 answer:
lilavasa [31]3 years ago
8 0
The answer is 122,000 
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An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 75 type K batteries and a sample of 46
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The decision rule for rejecting the null hypothesis, considering the t-distribution, is of:

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<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if there is not enough evidence to conclude that the mean voltage for these two types of batteries is different, that is, the subtraction of the sample means is of zero, hence:

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At the alternative hypothesis, it is tested if there is enough evidence to conclude that the mean voltage for these two types of batteries is different, that is, the subtraction of the sample means different of zero, hence:

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Considering the significance level of 0.05, with 75 + 46 - 2 = 119 df, the critical value for the test is given as follows:

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Hence the decision rule is:

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More can be learned about the t-distribution in the test of an hypothesis at brainly.com/question/13873630

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