A health care professional wants to determine whether
individuals with hypertension who take Atenolol have significantly
lower systolic blood pressure than individuals with hypertension
who do not take Atenolol. For individuals who have not been
prescribed Atenolol, the population systolic blood pressure mean is
155 (µ = 155). The 33 individuals who take Atenolol have an average
systolic blood pressure of 145, with a sample standard deviation of
24. On the basis of these data, can the researcher conclude that
the Atenolol significantly lowers systolic blood
pressure? (Use these numbers only for this
question!)
What is the z-value or t-value you obtained (your test statistic)?
(numeric value only, including negative sign if required)
Test statistic,
t = (xbar - mu)/(s/sqrt(n))
t = (145 - 155)/(24/sqrt(33))
t = -2.394
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly...
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 234 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 8.47. On the basis of these data, can the researcher conclude that...
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 168 (µ = 168). The 30 individuals who take Atenolol have an average systolic blood pressure of 107, with a sample standard deviation of 11. On the basis of these data, can the researcher conclude that...
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 171 (µ = 171). The 30 individuals who take Atenolol have an average systolic blood pressure of 144, with a sample standard deviation of 23. On the basis of these data, can the researcher conclude that...
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A comparative psychologist (animal behavior researcher) wants to determine whether parrots have emotions and use them in their daily lives. He studies a collection of 12 African Gray Parrots in pairs and collects the number of times that the parrots in the pairs make aggressive actions against one another following a vocalization. He also records the vocalizations themselves and scores their intensity using digital audio analysis software. He hypothesizes that as the intensity of the vocalizations changes so does the...