davenport stat500 week 1 quiz ch 1 and 2

davenport stat500 week 1 quiz ch 1 and 2

Question

· 1

Determine whether the given value is a statistic or parameter.

After inspecting all of 55,000 kg of meat stored in Worst Sausage Company, it was found that 45,000 kg of meat was spoiled.

· Question 2

5 out of 5 points

Determine whether the given value is a statistic or parameter.

A sample of 120 employees of a company is selected, and the average age is found to be 37 years.

· Question 3

5 out of 5 points

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.

Survey responses of "good", "better", "best".

· Question 4

5 out of 5 points

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.

The subjects in which college students major.

· Question 5

5 out of 5 points

Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.

100,00 randomly selected adults were asked whether they drink at least 48oz of water each day and only 45% said yes.

· Question 6

5 out of 5 points

Identify which type of sampling method was used:

A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers.

· Question 7

5 out of 5 points

Identify which sampling method is used:

A market researcher selects 500 drivers under 30 years of age and 500 drivers over 30 years of age.

· Question 8

0 out of 5 points

Provide an appropriate response.

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and then interviews all of the teachers at the selected schools. Does this sampling plan result in a random sample? Simple random sample? Explain.

· Question 9

5 out of 5 points

Provide an appropriate response.

A polling company obtains an alphabetical list of of names of voters in a precinct. They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.

· Question 10

5 out of 5 points

The frequency distribution for the weekly incomes of part time students is given below.Construct the corresponding relative frequency distribution. Round relative frequencies to the nearest hundredth of a percent, if necessary.

Income ($)

Frequency

200-300

56

301-400

50

401-500

81

501-600

67

More than 600

16

· Question 11

5 out of 5 points

Find the original data from the stem plot.

Stem

Leaves

2

6 8

3

1 8

4

6 6

· Question 12

5 out of 5 points

Which of the following describes a histogram?

T