Question

1. Weights of statistics students were obtained by a teacher as part of an experiment conducted for the class. The last digit of those weights are listed below. Construct a frequency distribution with 10 classes. Based on the​ distribution, do the weights appear to be reported or actually​ measured? What can be said about the accuracy of the​ results?

000000001233345555555555668899

Complete the frequency distribution below.

Last digit Frequency Last digit Frequency

0 ___ 5 ___

1 ___ 6 ___

2 ___ 7 ___

3 ___ 8 ___

4 ____ 9 ___

​(Type integers or​ decimals.)

2. Construct the cumulative frequency distribution for the given data.

Age​ (years) of Best Actress when award was won	Frequency
​20-29	2929
​30-39	3333
​40-49	1111
​50-59	22
​60-69	55
​70-79	11
​80-89	22

Age​ (years) of Best Actress when award was won Cumulative Frequency

Less than 30 ____

Less than 40 ____

Less than 50 ____

Less than 60 ____

Less than 70 _____

Less than 80 ____

Less than 90 ____

3. Among fatal plane crashes that occurred during the past 60 ​years, 602 were due to pilot​ error, 85 were due to other human​ error, 522 were due to​ weather, 391 were due to mechanical​ problems, and 410 were due to sabotage.   

Construct the relative frequency distribution. What is the most serious threat to aviation​ safety, and can anything be done about​ it?

Complete the relative frequency distribution below.

Cause	Relative Frequency
Pilot error	___​%
Other human error	___​%
Weather	___%
Mechanical problems	___​%
Sabotage	___%

​(Round to one decimal place as​ needed.)

Answer 1