WorksheetsEmpirical Rule practice before quiz
Total questions: 16
Worksheet time: 3hrs 40mins
About what percent of the products last between 12 and 15 days?
Then, 68% of all tires will have a life between ___________ km and __________ km.
Which interval shows 99.7% of the data given a mean of 15 and a standard deviation of 3?
9 to 21
12 to 18
6 to 24
13 to 16
Use the following information and the Empirical Rule to estimate the answer.
The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.
Find the proportion of golfers that are older than 42.
13.5%
16%
50%
85%
The Empirical Rule's percents are:
68-95.7-99
68-95-99.7
68.7-95-99
2000 freshmen at State Univ. took a Biology test. The scores were distributed normally with μ=70 and σ=5.
Approximately how many students scored between 60 and 80?
95
100
1900
1950
500 juniors at Central High School took the ACT last year. The scores were distributed normally with μ=24 and σ=4.
What ACT score is 3 standard deviations below the mean?
12
16
20
21
500 juniors at Central High School took the ACT last year. The scores were distributed normally with μ=24 and σ=4.
What percent of ACT scores are between 20 and 28?
34%
68%
81.5%
95%
