Five times the sum of a number and 7 is 3 more than the double of a number. Find the number.
2 answers:
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Answer:
The right options are:
a. The margin of error is 0.632
f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.
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Step-by-step explanation:
<em>The question is incomplete:</em>
<em>Select one or more:</em>
<em>a. The margin of error is 0.632</em>
<em>b. The margin of error is 1264.</em>
<em>C. The margin of error is 0.600.</em>
<em>d. We believe that the true mean time spent on breakfast is between 11.968 and 13.232 minutes.</em>
<em>e. If we take many other samples from this population, 95% of them will have a sample mean that is between 11968 and 13232.</em>
<em>f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.</em>
The margin of error can be calculated from the bounds of the confidence interval as:
As the confidence interval is calculated at 95% confidence, we are 95% confident that the true mean is within the calculated interval. We are not 100% confident although (that's why Option d is false).
This interval does not give us information about the sampling distribution (option e is false).