Margin of Error for proportions

85% of the juniors of WRH wish to attend the prom. If the margin of error is 2.5%, which intervals represent the data of the true mean?

• (85, 87.5)

• (82.5, 97.5)

• (82.5, 87.5)

• (87.5, 82.5

If the interval of data percentage of the data is (65, 78), what is the true mean?

• 73

• 74.5

• 71.5

• 72.5

There are 50 Beta Club members at WRH and 710 students in all. What is the proportion of the Beta Club Members

• 7.04%

• .704%

• 7%

• 7.05%

Of the 192 seniors of WRH, 103 will attend the prom night. What proportion of seniors will attend the prom night?

• 5.63%

• 53.6%

• 50.3%

• 0.54%

73% of the 120 students at WRH will attend the prom night. What is the margin of error of this data?

• 0.08

• 8

• .8

• 0.008

77 of the respondents in a research out of 200 with to participate in a community service. What is the proportion of the data in decimal?

• 0.385

• 3.85

• 38.5

• 385

Convert 1.2% in decimal.

• 0.12

• 1.22

• 0.012

• 0.0012

The margin of error of a study is 2.5% when the mean percentage is 67%. Which of the following is not within the range of data?

• 69.5

• 65.5

• 64.5

• 63.5

The margin of error of the set of data is 4% when the true mean is 67.5%. Which of the following is not within the range of data

• 72

• 71.5

• 63.5

• 65

The margin of error of a set of data is 1.5% and the true mean is 67%. Which of the following is within the range of data?

• 69

• 69.5

• 65.5

• 64.5