It takes an average of 9.4 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 49 injured patients to immediately tell the truth about the injury and noticed that they averaged 9.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 0.94 minutes. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer ? H1: ? Select an answer c. The test statistic ? (please show your answer to 3 decimal places.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Chapter10: Statistics
Section10.3: Measures Of Spread
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It takes an average of 9.4 minutes for blood to begin clotting after an injury. An EMT wants to see if
the average will decline if the patient is immediately told the truth about the injury. The EMT
randomly selected 49 injured patients to immediately tell the truth about the injury and noticed that
they averaged 9.1 minutes for their blood to begin clotting after their injury. Their standard
deviation was 0.94 minutes. What can be concluded at the the a = 0.01 level of significance?
a. For this study, we should use Select an answer
b. The null and alternative hypotheses would be:
Ho:
Select an answer
?
H1:
?
Select an answer
c. The test statistic ? O
(please show your answer to 3 decimal places.)
d. The p-value =
e. The p-value is ? O a
f. Based on this, we should Select an answer a the null hypothesis.
g. Thus, the final conclusion is that.
|(Please show your answer to 4 decimal places.)
The data suggest the populaton mean is significantly less than 9.4 at a = 0.01, so there
is statistically significant evidence to conclude that the population mean time for blood
to begin clotting after an injury if the patient is told the truth immediately is less than
9.4.
The data suggest that the population mean is not significantly less than 9.4 at a = 0.01,
so there is statistically insignificant evidence to conclude that the population mean time
for blood to begin clotting after an injury if the patient is told the truth immediately is
less than 9.4.
O The data suggest the population mean is not significantly less than 9.4 at a = 0.01, so
there is statistically significant evidence to conclude that the population mean time for
blood to begin clotting after an injury if the patient is told the truth immediately is equal
to 9.4.
Transcribed Image Text:It takes an average of 9.4 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 49 injured patients to immediately tell the truth about the injury and noticed that they averaged 9.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 0.94 minutes. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer ? H1: ? Select an answer c. The test statistic ? O (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? O a f. Based on this, we should Select an answer a the null hypothesis. g. Thus, the final conclusion is that. |(Please show your answer to 4 decimal places.) The data suggest the populaton mean is significantly less than 9.4 at a = 0.01, so there is statistically significant evidence to conclude that the population mean time for blood to begin clotting after an injury if the patient is told the truth immediately is less than 9.4. The data suggest that the population mean is not significantly less than 9.4 at a = 0.01, so there is statistically insignificant evidence to conclude that the population mean time for blood to begin clotting after an injury if the patient is told the truth immediately is less than 9.4. O The data suggest the population mean is not significantly less than 9.4 at a = 0.01, so there is statistically significant evidence to conclude that the population mean time for blood to begin clotting after an injury if the patient is told the truth immediately is equal to 9.4.
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