A friend tells you that she has conducted a survey to nd the proportion of people in her university that utilize the campus intemet cafe at least once a day. She has collected a sample and calculated a sample proportion of p = 0.68. She uses this value to calculate a condence interval for the population proportion. Your friend says that she is not going to tell you the sample size or the level of condence used in her construction, but she does tell you that the lower bound for the interval is 0.53. From the following list, select the values that, based on the information given, could possibly be the upper bound of the condence interval your friend calculated: 0.88 0.78 0.83 0.68 DDDDCI 0.73 A survey was run by a high school student in order to determine what proportion of mortgageholders in his town expect to own their house within 10 years. He surveyed 43 mortgage holders and found that the proportion ofthese that did expect to own their house within 10 years is 0.42. The student decides to consti'uct a 95% condence interval for the population proportion. You may nd this standard normal table useful for thefollowing questions. a) Calculate the margin of error that the high school student Iwill have. Give your answer as a decimal to 2 decimal places. Margin of error = |:| A university student nds the survey results of the high school student and believes he should have had a larger sample. The university student surveys 86 mortgage holders in her town and nds that the proportion of these that do expect to own their house within 10 years is again 0.42. This student also constructs a 95% condence interval for the population proportion. h) Calculate the margin of error that the university student will have. Give your answer as a decimal to 2 decimal places. Margin of error = |:| A survey of 118 small business owners found that a proportion of 0.695 of the owners had decided to downsize in the year following the Global Financial Crisis {GFC). a) Calculate the number of surveyed small business owners that downsized. Give your answer to the nearest whole number. Number of owners that downsized = |:| A 95% condence interval is to be constructed for the proportion of all small business owners that decide to downsize after the GFC. You may nd this standard normal table useful for the following questions. In) Calculate the lower bound for the condence interval. ve your answer as a decimal to 3 decimal places. Lower bound for condence interval = |:| c) Calculate the upper bound for the condence interval. Give your answer as a decimal to 3 decimal places. Upper bound for condence interval = |:|