1 answer:
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Answer:
First option.
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Step-by-step explanation:
The given set of numbers are:
And it is required to order the set of numbers correctly from least to greatest.
The easiest way is to convert all numbers to decimal and comparing it.
So, The order from least to greatest is as following
So, the correct answer is first option.
Answer:
Yes, there is a significant difference in customer satisfaction ratings at the two stores
The P-value is P=0.000.
Step-by-step explanation:
<em>The question is incomplete:</em>
<em>The store A has a sample mean of 4.05 and a sample standard deviation of 0.039. The store B has a sample mean of 3.99 and a sample standard deviation of 0.025.</em>
We have to perform an hypothesis test for the difference between means.
The claim will state that satisfaction ratings differ. So, the null and alternative hypothesis are:
being μ1: the actual staisfaction rating of store A, and μ2: the actual satisfaction rating of store B.
The significance level is 0.05.
We know that, for both samples, the sample size is n=100.
The difference between means is:
The standard error of the diffence between means is calculated as:
The z-statistic can be calculated as:
The P-value for this test statistic in a two tailed test is
The P-value is smaller than the significance level, so the effect is significant. The null hypothesis is rejected.
There is enough evidence that the customer satisfaction rating differs from store A to store B.