Each person in a random sample of 20 students at a particular university was asked whether...
Each person in a random sample of 20 students at a particular university was asked whether he or she is registered to vote. The responses (R = registered, N = not registered) are given here:
N N R R R N N N R R R R N N N R N N R R
Use these data to estimate p, the true proportion of all students at the university who are registered to vote.
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Each person in a random sample of 20 students at a particular
university was asked whether...
A random sample of students were asked whether they were satisfied with their school's lunch menu....
A random sample of students were asked whether they were satisfied with their school's lunch menu. The resulting confidence interval for the proportion of students who are satisfied is (0.33,0.51). What is the margin of error?
In a random sample of 275 students at a university, 225 stated that they were nonsmokers....
In a random sample of 275 students at a university, 225 stated that they were nonsmokers. Based on this sample, compute a 92 % confidence interval for the population proportion of all students at the university who are smokers. What is the Best point estimate, Margin of Error and Include the written statement.
(A) Mrs. Smith took a random sample of students after winter break and asked if they...
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(A) Mrs. Smith took a random sample of students after winter break and asked if they...
(A) Mrs. Smith took a random sample of students after winter break and asked if they enjoyed their break. She found that 70% of the 40 students she asked said yes. Estimate and interpret a 90% confidence interval for the proportion of all students who enjoyed their break. (B) How large of a sample will allow Mrs. Smith to get a margin of error of 2.5% at a 95% confidence level? Remember to SHOW your work with the numbers plugged...
Suppose that at a particular college, a random sample found that 25 out of 100 students...
Suppose that at a particular college, a random sample found that 25 out of 100 students who use the internet use Twitter. Does this provide evidence that the true proportion of students at this college who use Twitter is higher than the nationally stated 15%? Use a significance level of 0.05 and the p-value to give your decision. The correct hypotheses to use are: Ho: p = 0.15 HA: p > 0.15 Blank #1: Report the test statistic to two...
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in...
(Test on a Mean, Sigma Unknown): A random sample of 12 first-year university students enrolled in MATH 1051H was drawn. At the course's completion, each student was asked how many hours he or she spent doing homework in statistics. The data are listed below. (28, 36, 38, 37, 32,36), (31, 31, 40, 40, 41, 36) You estimate that the population standard deviation is 7. The instructor has recommended that students devote 3 hours per week for the duration of the...
in a sample of 150 residents, each person was asked if he or she favored the...
in a sample of 150 residents, each person was asked if he or she favored the concept of having! 9-3 \p a single countrywide police agency. The residence (city or outside the city) and the responses 4 of the residents are summarized in the following table. Oppose (A) 40 Favor (F) Residence City 80 10 20 Outside of City (OC) If one of these residents was to be selected at random, what is the probability that the person will (a)...
In a local university, 66% of the students live in the dormitories. A random sample of...
In a local university, 66% of the students live in the dormitories. A random sample of 70 students is selected for a particular study. We know that the standard error of the proportion is 0.0566. Find the probability that the sample proportion (the proportion living in the dormitories) is between 0.64 and 0.67.
In a local university, 66% of the students live in the dormitories. A random sample of...
In a local university, 66% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. We know that the standard error of the proportion is 0.0530. Find the probability that the sample proportion (the proportion living in the dormitories) is between 0.65 and 0.68.
A random sample of university students were asked whether they participate in varsity athletics and how...
A random sample of university students were asked whether they participate in varsity athletics and how many times they had used marijuana in the last ten days. If the necessary conditions are met, which of the following methods would be most appropriate to test for an association between the whether or not a student participates in varsity athletics and the frequency of marijuana use? A) One sample t-test B) Paired t-test C) Two sample t-test for difference in means D)...
Suppose that at a particular college, a random sample found that 25 out of 100 students who use the internet use Twitter. Does this provide evidence that the true proportion of students at this college who use Twitter is higher than the nationally stated 15%? Use a significance level of 0.05 and the p-value to give your decision. The correct hypotheses to use are: Ho: p = 0.15 HA: p > 0.15 Blank #1: Report the test statistic to two...
in a sample of 150 residents, each person was asked if he or she favored the concept of having! 9-3 \p a single countrywide police agency. The residence (city or outside the city) and the responses 4 of the residents are summarized in the following table. Oppose (A) 40 Favor (F) Residence City 80 10 20 Outside of City (OC) If one of these residents was to be selected at random, what is the probability that the person will (a)...
A random sample of university students were asked whether they participate in varsity athletics and how many times they had used marijuana in the last ten days. If the necessary conditions are met, which of the following methods would be most appropriate to test for an association between the whether or not a student participates in varsity athletics and the frequency of marijuana use? A) One sample t-test B) Paired t-test C) Two sample t-test for difference in means D)...
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