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Sagot :
The Z-value posted in part(c) for a confidence level of 74% is 1.150
The Confidence level in statistics denotes the likelihood that an estimate of the location of a statistical parameter (such as an arithmetic mean) in a sample survey will also hold true for the population.
Confidence levels must be determined before conducting a survey since they affect the poll's margin of error and necessary coverage. 90, 95, and 99% confidence intervals are widely employed in surveys.
A calculated statistic that was based on a sample would also be true for the entire population, within the established confidence level, with a 95% likelihood, if the confidence level were set at 95%.
Every confidence level has different z-value
In the question, We have to write the Z-value of 74% which is 1.15
To know more about Confidence level here
https://brainly.com/question/22851322
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