A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score from a personality inventory. For adults in the U.S., the mean SI score from this inventory is about 150. The psychologist gathers a random sample of 13 SI scores of smokers and finds that their mean is 162 and their standard deviation is 40. Assume that the population of SI scores of smokers is normally distributed with mean µ. Based on the sample, can the psychologist conclude that µ is different from 150? Use the 0.05 level of significance. Perform a two-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. The null hypothesis: H0: ______ The alternative hypothesis: H1: _____ The type of test statistic: (Choose one) _____ The value of the test statistics: _____ (Round to at least three decimal places) The two critical values at the 0.05 level Of significance: ______ and ______ (round to at least three decimal places.) At the 0.05 level of significance, can the psychologist Conclude that the mean SI score among smokers is different From 150? Yes ______ or NO _______
A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score from a personality inventory. For adults in the U.S., the
The psychologist gathers a random sample of 13 SI scores of smokers and finds that their mean is 162 and their standard deviation is 40. Assume that the population of SI scores of smokers is
Perform a two-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places and round your answers as specified in the table.
The null hypothesis: H0: ______
The alternative hypothesis: H1: _____
The type of test statistic: (Choose one) _____
The value of the test statistics: _____
(Round to at least three decimal places)
The two critical values at the 0.05 level
Of significance: ______ and ______
(round to at least three decimal places.)
At the 0.05 level of significance, can the psychologist
Conclude that the mean SI score among smokers is different
From 150? Yes ______ or NO _______
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