Unit 8 Stats Review

Interview the first 30 students who enter the school in the morning. 

• simple random
• voluntary response
• systematic
• convenience

Tags

CCSS.HSS.IC.B.3

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 

• systematic
• simple random sample
• convenience
• volunteer response

Tags

CCSS.HSS.IC.B.3

Political webpages often allow readers to rate whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

• Voluntary Response
• Convenience Sampling
• Simple Random Sampling
• Systematic Random Sampling

Tags

CCSS.HSS.IC.B.3

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

Tags

CCSS.HSS.IC.B.3

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:

• Simple Random Sample
• Stratified Random Sample
• Voluntary Response
• Systematic Random Sampling

Tags

CCSS.HSS.IC.B.3

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 50 blocks and survey all households on each selected block. 
This is an example of:

• Simple Random Sample
• Stratified Random Sample
• Cluster Random Sample
• Systematic Random Sampling

Tags

CCSS.HSS.IC.B.3

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates.  The registrar randomly selects 100 names from each of the four past graduating classes.

• cluster
• volunteer
• stratified
• simple random

Tags

CCSS.HSS.IC.B.3

For a class project, a student in a statistics class surveys the monthly rent for 32 unfurnished one-bedroom apartments in Boston and finds the mean monthly rent to be $1400 with a standard deviation of $220.

Find the margin of error for the sample mean. (assuming 95% confidence) Round to the nearest hundredth

• $77.78

• $4.31

• $188.78

• $494.97

Tags

CCSS.HSS.IC.B.4

Researchers want to estimate with 95% confidence the true mean pulse rate of American adult males who jog at least 15 miles per week. They survey 21 males and find the sample mean pulse rate to be 52.6 beats per minute and a standard deviation of 3.22 beats per minute. Find the margin of error for the mean pulse rate of all American adult males who jog at least 15 miles per week. Round to the nearest tenth.

• 1.4 beats per minute

• 1.7 beats per minute

• 0.9 beats per minute

• 4.1 beats per minute

Tags

CCSS.6.SP.B.5C

Complete the following statement about the change in size.

If you increase the size of your sample, the margin of error will . . . .

• increase

• decrease

• stay the same

Tags

CCSS.HSS.IC.B.4