Chapter 11 part 1 1 Determine whether the value given is a p

Chapter 11 part `1

1. Determine whether the value given is a parameter or statistic

Two thirds of all the students in this class are women

Parameter

Statistic

2. Determine whether the value given is a parameter or statistic

A sample of men reveals 60% took calculus

Statistic

Parameter

3. A political scientist surveys 27 of the current 141 representatives in a state\'s congress.

What is the size of the sample:

What is the size of the population:

4. Eggs that are contaminated with salmonella can cause food poisoning among consumers. A large egg producer takes an SRS of 200 eggs from all the eggs shipped in one day. The laboratory reports that 11 of these eggs had salmonella contamination. Unknown to the producer, 0.2% (two-tenths of one percent) of all eggs shipped had salmonella. In this situation

both 0.2% and 11 are statistics.

0.2% is a parameter and 11 is a statistic.

11 is a parameter and 0.2% is a statistic.

both 0.2 % and 11 are parameters.

5. In a national survey of eating habits, 3800 adults were selected randomly and contacted by telephone. Respondents were asked,

Solution

(1)Parameter

----------------------------------------------------------------------------------------------------------------------

(2)Statistic

----------------------------------------------------------------------------------------------------------------------

(3)

What is the size of the sample:27

What is the size of the population: All representatives in a state\'s congress.

----------------------------------------------------------------------------------------------------------------------

(4)both 0.2% and 11 are statistics.

----------------------------------------------------------------------------------------------------------------------

(5)2.4 is a statistic and represents an estimate of the unknown value of a parameter ofinterest.

----------------------------------------------------------------------------------------------------------------------

(6)C. 2.4 is a statistic and represents an estimate of the unknown value of a parameter of interest.

----------------------------------------------------------------------------------------------------------------------

(7)Because if we have to pay for total loss for one or more of these 12 policies, it would be financially disastrous.

----------------------------------------------------------------------------------------------------------------------

(8)Because if we have to pay for total loss for one or more of these 12 policies, it would be financially disastrous.

----------------------------------------------------------------------------------------------------------------------

(9)the standard deviation =s/vn =10/sqrt(3) = 5.7735

----------------------------------------------------------------------------------------------------------------------

(10)A.The average of several measurements is more likely to be close to the mean than the result of a single measurement.

----------------------------------------------------------------------------------------------------------------------

(11) 3 times

----------------------------------------------------------------------------------------------------------------------

(12)Yes. This is exactly what the theorem says.

----------------------------------------------------------------------------------------------------------------------

(13)the distribution of the sample mean is approximately Normal.

----------------------------------------------------------------------------------------------------------------------

(14)All of the above.