Question

1.Determine whether the source given below has the potential to create a bias in a statistical study.

Washington University obtained word counts from the most popular novels of the past five years.

Choose the correct answer below.

A.

There does not appear to be a potential to create a bias. The organization would not gain from putting a spin on the results.

B.

There does not appear to be a potential to create a bias. The organization is reputable and has many professional and credible members.

C.

There does appear to be a potential to create a bias. There is an incentive to produce results that are in line with the​ organization's creed and that of its funders.

D.

There does appear to be a potential to create a bias. There is an incentive to make the results statistically insignificant.

3. In the data table​ below, the​ x-values are the weights​ (in pounds) of cars and the​ y-values are the corresponding highway fuel consumption amounts​ (in mi/gal).

Weight​ (lb)	40174017	33793379	41224122	36673667	35333533
Highway Fuel Consumption​ (mi/gal)	2525	3232	2929	2828	3030

Given the context of the car measurement​ data, what issue can be addressed by conducting a statistical analysis of the​ values?

Choose the correct answer below.

A.

Does the weight of a car cause the highway fuel consumption of the car to increase or​ decrease?

B.

Does the highway fuel consumption of a car cause the weight of the car to increase or​ decrease?

C.

Is there a relationship between the mean weight of a car and the mean fuel consumption of​ cars?

4. Which of the following is typically the least important factor to consider when conducting a statistical analysis of​ data?

Choose the correct answer below.

1. Sampling method

2. Context of the data

3. Formula calculation

4. Source of the data

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

Upper A study was conducted of all 882 workers in a certain state.A study was conducted of all 882 workers in a certain state.

Choose the correct answer below.

A.

The value is a

statisticstatistic

because it is a numerical measurement describing some characteristic of a population.population.

B.

The value is a

parameterparameter

because it is a numerical measurement describing some characteristic of a population.population.

C.

The value is a

parameterparameter

because it is a numerical measurement describing some characteristic of a sample.sample.

D.

The value is a

statisticstatistic

because it is a numerical measurement describing some characteristic of a sample.sample.

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

In a study of all 4485 seniors at a college comma it is found that 35 % own a vehicle.In a study of all 4485 seniors at a college, it is found that 35% own a vehicle.

Choose the correct statement below.

1. ParameterParameter

because the value is a numerical measurement describing a characteristic of a

samplesample.

2. StatisticStatistic

because the value is a numerical measurement describing a characteristic of a

samplesample.

3. StatisticStatistic

because the value is a numerical measurement describing a characteristic of a

populationpopulation.

4. ParameterParameter

because the value is a numerical measurement describing a characteristic of a

populationpopulation.

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

A homeowner measured the voltage supplied to his home

on 38 different dayson 38 different days​,

and the average​ (mean) value is

124.6124.6

volts.

Choose the correct answer below.

A.

The given value is a

parameterparameter

for the

yearyear

because the data collected represent a

populationpopulation.

B.

The given value is a

parameterparameter

for the

yearyear

because the data collected represent a

samplesample.

C.

The given value is a

statisticstatistic

for the

yearyear

because the data collected represent a

samplesample.

D.

The given value is a

statisticstatistic

for the

year

because the data collected represent a

populationpopulation.

Answer 1

1.A. There does not appear to be a potential to create a bias. The organization would not gain from putting a spin on the results.

3.c) Is there a relationship between the mean weight of a car and the mean fuel consumption of​ cars?

4.a ) sampling method

5 b) The value is a parameter because it is a numerical measurement describing some characteristic of a population.

6 b) Statistic because the value is a numerical measurement describing a characteristic of a sample.

7.C) The given value is a statistic for the year

because the data collected represent a

sample.