Select the two recommendations that would decrease the margin of error of the interval.
1 answer:
From the options given, the only option which would result on having a reduced error margin, is to increase the sample size.
<u>Recall</u><u> </u><u>:</u><u> </u>
<em>Margin of Error</em> = Zcritical × σ/√n
- Increasing the mean would have no impact on the margin of error as it is not a part of the factors which affects the margin of error value.
- Increasing the standard deviation, which is the Numerator will result in an increased margin of error value.
- By raising the confidence level, the critical value of Z will increase, hence widening the margin of error.
- The sample size, n being the denominator, would reduce the value of error margin.
Hence, only the sample size will cause a decrease in the margin of error of the interval.
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Based on the graph, the correct statements are;
A: Voters age 55–64 were more likely to use nontraditional voting methods than people age 45–54.
B: Voters age 65 and older were more likely to use nontraditional voting methods than all other age groups.
<h3>What is the correct statement about the graph?</h3>The attached graph shows us that the likelihood of the 55–64 aged group using non-traditional voting methods is 69.7 as against 65.9 scored by the 45–54 age group.
Secondly, on the graph, the age group with the highest likelihood to use non-traditional voting methods is voters aged 65 and older with 77.7.
Finally, the graph shows us that age has a great influence on voters in choosing non-traditional voting methods over traditional methods.
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