o compare customer satisfaction with holiday gift purchases of digital gear from online and walk in retailers, a researcher randomly selects 30 customer ratings of online retailers and 31 customer ratings of walk in retailers. The mean customer rating of online retailers is 90 out of 100. Assume the population standard deviation is 3.4. The mean customer rating of walk-in retailers is 88 out of 100. Assume the population standard deviation is 3.5. At a=0.01, can the researcher support the claim that the mean customer rating of online retailers is greater than the mean customer rating of walk in retailers? A.) Identify the claim, state the null and alternative hypothesis. B.) Find the critical value(s) and identify the rejection region(s) C.) Find the standardized test statistic z
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
To compare customer satisfaction with holiday gift purchases of digital gear from online and walk in retailers, a researcher randomly selects 30 customer ratings of online retailers and 31 customer ratings of walk in retailers. The mean customer rating of online retailers is 90 out of 100. Assume the population standard deviation is 3.4. The mean customer rating of walk-in retailers is 88 out of 100. Assume the population standard deviation is 3.5. At a=0.01, can the researcher support the claim that the mean customer rating of online retailers is greater than the mean customer rating of walk in retailers?
A.) Identify the claim, state the null and alternative hypothesis.
B.) Find the critical value(s) and identify the rejection region(s)
C.) Find the standardized test statistic z
D.) Decide whether to reject or fail to reject the null hypothesis.
E.) Interpret the decision in the context of the original claim.
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