Mathematics, 17.12.2020 14:00 leinee
A band director is trying to decide what music to play for the halftime show. She surveys the marching band students to get their opinions about which music they would prefer. Which of the following sampling techniques would provide a stratified random sample that would accurately represent the students’ opinions?
A) Have a computer randomly sort the band members, then select the first 30.
B) Randomly select 2 students from each type of instrument (trumpet, saxophone, clarinet, etc.).
C) Randomly pick a letter of the alphabet and survey every student whose last name begins with that letter.
D) Randomly pick a year of students (freshman, sophomore, junior, or senior) and survey every student from the selected group.
Answers: 2
Mathematics, 21.06.2019 21:30
Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?
Answers: 1
Mathematics, 21.06.2019 22:00
22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!
Answers: 1
A band director is trying to decide what music to play for the halftime show. She surveys the marchi...
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