aim that the main systolic blood pressure for vegetarians is lower than the mean sy re for nonvegetarians. Also assumed that the population standard deviations are ed he standard error of the difference between means is obtained by pooling the samp nany populations? 1 2 s the parameter? Difference between Means

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A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower than the
blood pressure of nonvegetarians. Independent simple random samples of 85 vegetarians and 75
nonvegetarians were obtained and the size, mean and standard deviation of each group was recorded. Test
the claim that the main systolic blood pressure for vegetarians is lower than the mean systolic blood
pressure for nonvegetarians. Also assumed that the population standard deviations are equal(o,-02), so
that the standard error of the difference between means is obtained by pooling the sample variances.
How many populations?
01
O2
What is the parameter?
O Difference between Means
O Variance
O Proportion
О Мean
O Standard Deviation
Transcribed Image Text:A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower than the blood pressure of nonvegetarians. Independent simple random samples of 85 vegetarians and 75 nonvegetarians were obtained and the size, mean and standard deviation of each group was recorded. Test the claim that the main systolic blood pressure for vegetarians is lower than the mean systolic blood pressure for nonvegetarians. Also assumed that the population standard deviations are equal(o,-02), so that the standard error of the difference between means is obtained by pooling the sample variances. How many populations? 01 O2 What is the parameter? O Difference between Means O Variance O Proportion О Мean O Standard Deviation
What is the test statistic?
Ot =
(T1 – 72) – (41 – 42)
(î1 – 72) – (41 - 42)
Ot =
I - ld
O ta
Ox? =
(n – 1)² . s?
OF
(F1 – F2) – (41 – H2)
(ê1 – P2) – (Pi – p2)
||
Transcribed Image Text:What is the test statistic? Ot = (T1 – 72) – (41 – 42) (î1 – 72) – (41 - 42) Ot = I - ld O ta Ox? = (n – 1)² . s? OF (F1 – F2) – (41 – H2) (ê1 – P2) – (Pi – p2) ||
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