The U.S. Census Bureau reports that in the year 2008, the mean household income was $68,424 and the median was $50,303. If a his
togram were constructed for the incomes of all households in the United States, would you expect it to be skewed to the right, skewed to the left, or approximately symmetric?
1 answer:
Answer:
<u>Skewed to the Right</u>
Step-by-step explanation:
Hello, great question. These types are questions are the beginning steps for learning more advanced problems.
Since the mean household income is $64,424 and the median was $50,303 then the mean is larger than the median. When this occurs then the constructed histogram is always <u>Skewed to the Right</u>. This is because there are a couple of really large values that affect the mean but not the middle value of the data set.
This in term leads to the graph dipping in values the farther right you go and increasing the farther left you go, as shown in the example picture below.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
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Answer:
A
The test statistics is
B
The Null and Alternative hypothesis are
and
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is
The sample mean is
The sample standard deviation is
The level of significance is
Given that the value which the manufacturer gave the automobile is 47.2 and it is believed that this is not correct, then
The Null Hypothesis is
The alternative Hypothesis is
The test statistics can be mathematically evaluated as
substituting values