"Athletes at major colleges graduated, on the whole, at virtually the same rate as other students." according to the NCAA in 1992. Suppose that in a poll of 500 athletes at major colleges, the number graduating was 268. a) Find a 98% confidence interval for the proportion of athletes at major colleges who graduate. b) The poll was done after the implementation of Proposition 48, which requires athletes maintain a minimum GPA in order to play. The graduation rate prior to this was p=0.51. What can you conclude?

1.A poll questioned 800 students about their views on pizza for lunch at school. The results indicated that 65% of respondents felt that pizza was a must for lunch at school and would quit school if there was no pizza at lunch. a) Determine the 90% confidence interval.  b) What is the margin of error for this response at the 90% confidence level?

A survey collected data on attitudes toward the quality of customer service in retail stores.  The survey found that 270 of the 750 American adults sampled felt that customer service is better today than it was two years ago. We wish to develop a 94% confidence interval for the proportion of American adults who feel customer service is better today than it was two years ago.   What is the population? A) the 750 American adults sampled B) customer service representatives C) all American adults

Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?