280 men are found to have an average pulse rate of 73 (beats per minute) with standard deviation 5.4, and 240 women are found to have an average pulse rate of 72 (beats per minute) with standard deviation 7.7. A researcher is interested in whether, on average, men have higher pulse rates than women. What is the most appropriate test for the researcher to use?
a. |
z-test for the difference between two proportions |
|
b. |
chi-squared test |
|
c. |
two sample t-test |
|
d. |
paired sample t-test |
280 men are found to have an average pulse rate of 73 (beats per minute) with...
1) Do faculty and students have similar perceptions of what types of behavior are inappropriate in the classroom. Each individual in a random sample of 173 students and 98 faculty members were asked to judge various behaviors on a scale from 1 (totally inappropriate) to 5 (totally appropriate). Data from the behavior “Addressing instructor by first name” are given below. Students Faculty Mean=2.90 Mean=2.11 StDev=1 StDev=1 n=173 n=98 Is there sufficient evidence to conclude that the mean “appropriateness” score assigned...
Assume that an adult female is randomly selected. Suppose females have pulse rates that are normally distributed with a mean of 79.0 beats per minute and a standard deviation of 12.5 beats per minute. Find the probability of a pulse rate between 62 beats per minute and 73 beats per minute. (Hint: Draw a graph.) The probability is _______ .
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 148 adult males, the mean pulse rate is 67.9 bpm and the standard deviation is 10.6 bpm. Find the value of the test statistic. The value of the test statistic is
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 144 adult males, the mean pulse rate is 69.5 bpm and the standard deviation is 10.8 bpm. Find the value of the test statistic. The value of the test statistic is nothing.
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 144 adult males, the mean pulse rate is 67.7 bpm and the standard deviation is 10.8 bpm. Find the value of the test statistic.
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 129 adult males, the mean pulse rate is 70.2 bpm and the standard deviation is 10.6 bpm. Find the value of the test statistic.
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 1311 adult males, the mean pulse rate is 70.5 bpm and the standard deviation is 11.4 bpm. find the value of the test statistic.
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 148 adult males, the mean pulse rate is 68.4 bpm and the standard deviation is 11.3 bpm. Find the value of the test statistic.
9. A research study measured the pulse rates of 37 randomly chosen college men and found a mean pulse rate of 70 beats per minute with a standard deviation of 7.85 beats per minute. Researchers want to know if the mean pulse rate for all college men is different from the current standard of 72 beats per minute. Assume that pulse rates are normally distributed. Test at 0.05 level of significance to prove the researcher's claim. (12 pts)
Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 169 adult males, the mean pulse rate is 69.3 bpm and the standard deviation is 10.7 bpm. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)