In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders that were not accurate among 385 orders observed. Use a 0.05 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appear to be acceptable?
Below are the null and alternative Hypothesis,
Null Hypothesis, H0: p = 0.1
Alternative Hypothesis, Ha: p ≠ 0.1
Test statistic,
z = (pcap - p)/sqrt(p*(1-p)/n)
z = (0.0883 - 0.1)/sqrt(0.1*(1-0.1)/385)
z = -0.77
P-value Approach
P-value = 0.441
As P-value >= 0.05, fail to reject null hypothesis.
In a study of the accuracy of fast food drive-through orders, one restaurant had 34 orders...
In a study of the accuracy of fast food drive through orders, one restaurant had 29 orders that were not accurate among 298 orders observed. Use a 0.05 significance level to test the claim that the rate of inaccurate orders is equal to 10%. Does the accuracy rate appears to be acceptable?
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