(16.19) A class survey in a large class for first-year college students asked, "About how many...
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(16.19) A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 434 students was x¯¯¯x¯ = 12 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 8 hours in the population of all first-year students at this university. What is the 99% confidence interval (±±0.001) for the population mean? Confidence interval is from ___to ___ hours. |
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(16.19) A class survey in a large class for first-year college
students asked, "About how many...
16.19) A class survey in a large class for first-year college students asked, "About how many...
16.19) A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 452 students was x¯¯¯ = 13 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 7 hours in the population of all first-year students at this university. What is the 99% confidence interval (±0.001) for the population mean? Confidence interval is from to hours.
A class survey in a large class for first-year college students asked, "About how many hours...
A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 451 students was x¯¯¯x¯ = 15 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 9 hours in the population of all first-year students at this university. What is the 99% confidence interval (±±0.001) for the population mean? Confidence interval is from_____ to ____ hours.
(16.19) A class survey in a large class for first-year college students asked, About how many...
(16.19) A class survey in a large class for first-year college students asked, About how many hours do you study during a typical week? The mean response of the 463 students was x = 15.3 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation σ = 8.5 hours in the population of all first-year students at this university. Step 1: Use the survey result to give a 99% confidence interval for the mean...
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 300 students was x⎯⎯⎯x¯ = 149 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation σσ = 65 minutes in the population of all first-year students at this university. Use the survey result to give a 96% confidence interval for the mean study time of...
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 274 students was x ¯ ¯ ¯ x¯ = 144 minutes. Suppose that we know that the studey time follows a Normal distribution with standard deviation σ σ = 65 minutes in the population of all first-year students at this university. Regard these students as an SRS from the population of all...
5. When a very large STAT 200v class was surveyed and asked, "About how many hours...
5. When a very large STAT 200v class was surveyed and asked, "About how many hours do you study during a typical week?" The mean response of 450 students were x = 13 hours. Supposed that we know that the study time follows a normal distribution with standard deviation o = 7.4 hours in the population of all STAT 2000 students at this University. a. Use the survey result to give a 99% confidence interval for the mean study time...
4. A survey asked a random sample of 363 first-year students how many hours they studied...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
7. A survey of first-year and second-year students at a large university asked if students were satisfied with college life. We are interested in whether there is a difference between first and secon...
7. A survey of first-year and second-year students at a large university asked if students were satisfied with college life. We are interested in whether there is a difference between first and second-year students with respect to this question. You performed a hypothesis test and found there was no evidence of a difference between first and second-year students in response to this question. You based th on a test using alpha -0.01. Would you have made the same decision at...
3. How much TV do College Students watch? In a survey 361 students were asked how...
3. How much TV do College Students watch? In a survey 361 students were asked how many hours of TV they watched per week. The sample gave an average of 6.504 hours. A bootstrap distribution gave a SE of 0.2939. Find and interpret a 90% confidence interval for the average number of hours a student watches TV per week.
The figure to the right shows the results of a survey in which 3000 college graduates...
The figure to the right shows the results of a survey in which 3000 college graduates from the year 2016 were asked questions about employment.Construct 99% confidence intervals for the population proportion of college students who gave each response. A table labeled "Employment, College students' responses to questions about employment" consists of five rows containing the following information from top to bottom, with row listed first and information listed second: Expect to stay at first employer for 3 or more...
5. When a very large STAT 200v class was surveyed and asked, "About how many hours do you study during a typical week?" The mean response of 450 students were x = 13 hours. Supposed that we know that the study time follows a normal distribution with standard deviation o = 7.4 hours in the population of all STAT 2000 students at this University. a. Use the survey result to give a 99% confidence interval for the mean study time...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
7. A survey of first-year and second-year students at a large university asked if students were satisfied with college life. We are interested in whether there is a difference between first and second-year students with respect to this question. You performed a hypothesis test and found there was no evidence of a difference between first and second-year students in response to this question. You based th on a test using alpha -0.01. Would you have made the same decision at...
3. How much TV do College Students watch? In a survey 361 students were asked how many hours of TV they watched per week. The sample gave an average of 6.504 hours. A bootstrap distribution gave a SE of 0.2939. Find and interpret a 90% confidence interval for the average number of hours a student watches TV per week.
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