According to the US Census Bureau, in 2004 the median household income in the Un

Question

According to the US Census Bureau, in 2004 the median household income in the United States was $43, 389 and the mean household income was $60, 528. Based on these two numbers the distribution of household income was: a. Symmetric. b. Skewed to the right. c. Skewed to the left. d. Bimodal. e. Not enough information given to estimate shape. A medical researcher claims that 10% of children suffer from a certain disorder. The hypotheses used to test this claim are: H_0: p = 0.10 H_1: p notequalto 0.10 Identify the type I error for the test. a. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 10% when that percentage is actually different from 10%. b. Fail to reject the claim that the percentage of children who suffer from the disorder is equal to 10% when that percentage is actually 10%. c. Reject the claim that the percentage of children who suffer from the disorder is different from 10% when that percentage really is different from 10%. d. Reject the claim that the percentage of children who suffer from the disorder is equal to 10% when that percentage is actually 10%.

Explanation / Answer

1. Mean > Median and the difference is significant. So, the distribution will be skewed to the right.

Option b is correct.

2. Type I error is rejecting the true null hypothesis. Hence,

Option d is correct.

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