2nd Semester Exam Review

The average weight of a newborn is 7.5 pounds, with a standard deviation of 1.25 pounds. Birth weight follows the standard normal curve. What percent of newborns weigh no more than 5 pounds at birth?

• 2.3%

• 0.15%

• 23%

• 50%

Tags

CCSS.HSS.ID.A.4

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

Given 200 dairy products, how many of the products last between 12 and 15 days?

• 18

• 68

• 35

• 80

Tags

CCSS.HSS.ID.A.4

What percentage of data falls between the z-score of -3 and 3?

• 68%

• 34%

• 95%

• 99.7%

Tags

CCSS.HSS.ID.A.4

The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.

• True

• False

Adam's Z-score on a test is +2.5.  What does this mean?

• He'd better start studying.
• He did better than EVERYONE.
• He scored 2.5 standard deviations above the average.
• He did terrible.

Joanne's Z-score is -1.5.  What does this mean?

• She didn't take the test yet.
• She scored 1.5 standard deviations below the average.
• She did better than most people.
• No clue

What kind of sampling technique is the following:

List the names of all the students alphabetically and contact the parent of every 25th student.

• Cluster Sampling

• Simple Random Sampling

• Systematic Sampling

• Stratified Sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling technique

"A researcher who is studying the effects of educational attainment on promotion conducted a survey of 50 randomly selected workers from each of these categories: high school graduate, with undergraduate degrees, with master's degree, and with doctoral degree."

• Simple Random Sampling

• Systematic Sampling

• Stratified Sampling

• Cluster Sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling technique

"A researcher interviewed all the top 10 Grade 11 students in each of 15 randomly selected private schools in Metro Manila."

• Simple Random Sampling

• Systematic Sampling

• Stratified Sampling

• Cluster Sampling

Tags

CCSS.HSS.IC.B.3

Tags

CCSS.HSA.APR.A.1