5:38 A ? all .73% In a group presentation, the average * geometric reasoning of Grade 10 students in a Mathematics camp was observed to be 80 with a standard deviation of 5. A researcher wants to replicate the study to estimate the true population mean u to within 0.5 maximum error. If the 85% level of confidence is adopted, how many respondents are needed? O 385 O 208 O 665 O 273 Allan, a Grade 12 senior high school * student, wants to estimate the average number of students who will pursue collage degree in a certain school. How many sample sizes does he need, if he plans to use 95% confidence, 0.5 as the margin of error, ! and a standard deviation of 6. E O5:37 A ? all .|73% docs.google.com, 12 .. . Find the interval estimate having a * mean of 98.4, a standard deviation of 6.5, a sample size of 11, with a confidence level of 90% 92.924