The following table represents a grouped frequency distribution of the number of hours spent on the phone per week for the surveyed students.What percentage of students used their phonemore than 9 hours per week?

Hours

Number of Students

0.0 - 2.9

1

3.0 - 5.9

7

6.0 - 8.9

19

9.0 - 11.9

16

12.0 +

7

In a few sentences, define and describe the purpose of a frequency table.

1. A soda manufacturer employees a quality controls expert. They are tasked with ensuring the quality of the soda is within reasonable industry standards.The soda cans are packed 15 to a case,100 cases can fit on a pallet, and 1000 pallets can fit in the warehouse. The expert can survey the soda in several different ways.

Match the appropriate sampling method with each scenario.

-A.B.C.D.E.

A computer program selects a 15,000 soda cans at random for the expert to test.

-A.B.C.D.E.

The expertgoes to the warehouse and selects the closest 10palletsto test to get 15,000 soda samples.

-A.B.C.D.E.

The expert goes to the warehouse andselects one case from each of the 1000 pallets for a total of15,000 soda samples.

-A.B.C.D.E.

Theexpertgoesto the warehouse and randomly selects 10 pallets for a total of 15,000 soda samples.

-A.B.C.D.E.

The expert goes to the the warehouse and selects every 100th pallet to test for a total of 15,00 soda samples.

Match the correct symbol to the correct term.

-A.B.C.D.

Population Mean

-A.B.C.D.

Sample Mean

-A.B.C.D.

Population Standard Deviation

-A.B.C.D.

Sample Standard Deviation

A.

B.

C.

D.

s

Match the statement with the best possible term.

-A.B.C.D.

A soda bottling company needs to test the quality of the bottles they produce.Amanager needs the results quickly, and has several bottles within reach to test.

-A.B.C.D.

Gathering data from every member of a particular group orinterest.

-A.B.C.D.

An investigator wants to know what types of vehicles accessed the highways in his city during the past week. He has access to traffic camera footage of each highway entrance ramp for that time period.There are no clear differences in the type of traffic seen at different times of day or at different locations.

-A.B.C.D.

A soda bottling company will test a random sample of 100 bottles on the production line to assure the product meets quality standards.The company selects the first bottle from every 1000 bottles produced.

Calculate the mean of the following data set to two decimal places.

32,25,28,32,20,39,32,25,32

The following table represents the frequency distribution of items bought at a clothing store.Determine the relative frequency of the tshirts.

Items

Number sold

T-shirts

80

Jeans

86

Sweaters

82

Jackets

60

In a few sentences, explain the meaning of "Random Sample" and why is it important when collecting data.