Assis with HW questions

Internal Revenue Services (IRS) selects taxpayer files for audit if their profile matches certain criteria. The Following sample is taken from taxpayers who were audited for tax year 2019:

Frequency	Taxable Income($1000s)
2	20 to under 40
5	40 to under 60
22	60 to under 80
25	80 to under 100
15	100 to under 120
10	120 to under 140
6	140 to under 160
5	160 to under 180

1. What is the cumulative relative frequency of taxpayers who were audited and their taxable income was less than $120,000?

Use the following information to answer questions 13-14:

Salty nut bar is produced at a highly automated facility.One of the quality control factors is the weight of each bar. Samples of 10 bars are taken regularly and adjustments are made based on the outcome of quality control process. Average weights and ranges of the latest samples are reported as following:

Sample	Average weight (gram)	Average Range
1	47	6
2	53	4
3	48	1
4	49	3
5	52	2

1. What is the upper control limit of