A sample of 25 freshman nursing students made a mean score of 77 on a test designed to measure attitude toward the dying patient. The sample standard deviation was 10. Do these data provide sufficient evidence to indicate, at the .05 level of significance, that the population mean is less than 80? What assumptions are necessary?

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A sample of 25 freshman nursing students made a mean score of 77 on a test designed to measure
attitude toward the dying patient. The sample standard deviation was 10. Do these data provide
sufficient evidence to indicate, at the .05 level of significance, that the population mean is less than
80? What assumptions are necessary?
Transcribed Image Text:A sample of 25 freshman nursing students made a mean score of 77 on a test designed to measure attitude toward the dying patient. The sample standard deviation was 10. Do these data provide sufficient evidence to indicate, at the .05 level of significance, that the population mean is less than 80? What assumptions are necessary?
A sample of 100 apparently normal adult males, 25 years old, had a mean systolic blood pressure of
125. It is believed that the population standard deviation is 15. What conclusion should be drawn from
these results?
The following data are the oxygen uptakes (milliliters) during incubation of a random sample of
15 cell suspensions:
14.0, 14.1, 14.5, 13.2, 11.2, 14.0, 14.1, 12.2,
11.1, 13.7, 13.2, 16.0, 12.8, 14.4, 12.9
Do these data provide sufficient evidence at the .05 level of significance that the population mean
is not 12 ml? What assumptions are necessary?
Transcribed Image Text:A sample of 100 apparently normal adult males, 25 years old, had a mean systolic blood pressure of 125. It is believed that the population standard deviation is 15. What conclusion should be drawn from these results? The following data are the oxygen uptakes (milliliters) during incubation of a random sample of 15 cell suspensions: 14.0, 14.1, 14.5, 13.2, 11.2, 14.0, 14.1, 12.2, 11.1, 13.7, 13.2, 16.0, 12.8, 14.4, 12.9 Do these data provide sufficient evidence at the .05 level of significance that the population mean is not 12 ml? What assumptions are necessary?
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