Reference no: EM132851184
1. Determine the sampling method used in each case below: simple random, stratified, cluster, or systematic sampling.
A. A grocery store gives a survey to each 25th customer on a given day.
B. A High School baseball league with 25 teams, randomly selects 5 teams, and surveys all players in these teams.
C. A College selects 50 student ID's using software that randomly selects them using the College' Database.
D. A school district contacts 25 families whose first language is English, 25 families where one of the parents does not speak English, and 25 families where both parents do not speak English, to send them a survey.
3. A radar on a highway collected the speed, in miles per hour, of several cars during a 2-hour period. The data are shown below. Make a relative frequency distribution for the data with 6 classes. 48 48 52 55 58 58 58 61 62 62 63 65 68 68 69 70 72 4.
Find the Mean, Median and Mode, for the data in the last problem
5. An instructor took a sample of the time it took 5 students to complete an exam. The data is shown below. Find the standard deviation for this set of data. 38 42 45 48 52 6.
A state has license plates with 4 letters (only uppercase) and 3 numbers (between 0-9). A. How many total license plates are possible in this state?
B. How many license plates are there, if 2 consecutive letters are not allowed to be equal to each other?