Question

In: Math

1. Which of the following variables is an example of a categorical variable? a) The amount...

1. Which of the following variables is an example of a categorical variable?

a) The amount of money you spend on eating out each month.

b) The time it takes you to write a test.

c) The geographic region of the country in which you live.

d) The weight of a cereal box.

2. Which of the following is an example of a discrete random variable?

a) The monthly electric bill for a local business.

b) The number of people eating at a local café between noon and 2:00 p.m.

c) The amount of time it takes for a worker to complete a complex task.

d) The percentage of people living below the poverty level in Boston.

3. A measurement scale that rates product quality as either 1 = poor, 2 = average and 3 = good is known as:

a) Nominal

b) Ordinal

c) Interval

d) Ratio

4. Which of the following statements involve descriptive statistics as opposed to inferential statistics?

a) The Alcohol, Tobacco and Firearms Department reported that Seattle had 1,825 registered gun dealers in 2013.

b) Based on a survey of 380 magazine readers, the magazine reports that 30% of its readers prefer double column articles.

c) The FAA samples 425 traffic controllers in order to estimate the percent retiring due to job stress related illness.

d) Based on a sample of 350 professional baseball players, a baseball magazine reported that 23% of the parents of all professional baseball players did not play baseball.

5. Suppose a survey is taken of 300 high school seniors out of a total of 1,000 seniors. This group is probably a:

a) Sample

b) Population

c) System

d) Process

6. Which of the following is a quantitative variable?

a) the make of a washing machine

b) a person's gender

c) price of a car in thousands of dollars

d) whether a person is a college graduate or not

7. Pareto's principle is applied to a wide variety of behavior over many systems. It is sometimes referred to as the:

a) "20-80" Rule

b) "80-20" Rule

c) "10-90" Rule

d) "90-10" Rule

8. Which of the following is most likely a continuous numerical variable?

a) the number of gallons of paint purchased

b) the number of reams of paper ordered

c) the population of Egypt in 2005

d) the number of miles of interstate highways

9. A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 110 batteries is tested and the average lifetime of this sample is found to be 200 hours. The 200 hours is the value of a:

a) parameter

b) statistic

c) sampling frame

d) population

Expert Solution

milcah answered 1 year ago

1 For each of the following variables, identify the type of variable (numeric or categorical) and...

1 For each of the following variables, identify the type of variable (numeric or categorical) and level of measurement (nominal, ordinal, interval, or ratio). a. Business size (micro, small, medium, large) b. Airplane ticket price 2 Consider the following sample of data: 1.2 28.4 32.6 17.0 13.5 2.2 38.0 41.4 1.9 14.4 21.8 23.8 a. Calculate the quartiles. b. Calculate the average c. Calculate the standard deviation. 3 Given the following ﬁve-number summary, are there any outliers in the data? Min:...

Which of the following is not a categorical variable?

Which of the following is not a categorical variable? Gender Diabetes Type Il status (Y/N) Height in cm Age divided into quartiles (<25th Percentile. 25-50th Percentile. 50-75th percentile, >75th percentile)

For each of the following variables, determine whether the variable is categorical or numerical. If the...

For each of the following variables, determine whether the variable is categorical or numerical. If the variable is numerical, determine whether the variable is discrete or continuous. In addition, determine the measurement scale. a. Number of times the individual changed jobs in the last 5 years b.Fragrance that the individual wears most frequently c. Amount of gasoline used for driving per month d.Day on which the person is most likely to shop online(Monday, Tuesday, etc.)

3.For each of the following variables, determine whether the variable is categorical or numerical. If the...

3.For each of the following variables, determine whether the variable is categorical or numerical. If the variable is numerical, determine whether the variable is discrete or continuous. In addition, determine the measurement scale. a. Time comma in hours comma spent surfing the Internet per week b. Whether the individual uses a mobile phone to connect to the Internet c. Number of hamburgers ordered in a week d. Where the individual uses social networks to find sought dash after information e....

Identify whether the following variables are numerical or categorical. If numerical, state whether the variable is...

Identify whether the following variables are numerical or categorical. If numerical, state whether the variable is discrete or continuous. If categorical, state whether the categories have a natural order (ordinal) or not (nominal). a. Fraction (or percentage) of birds in a large sample infected with avian flu virus b. Number of crimes committed by a randomly sampled individual. c. gender d. Logarithm of body mass e. Stage of fruit ripeness (eg., underripe, ripe, or overripe) f. Tree species g. Petal...

1. Give and example of a case that has both a categorical and quantitative variable someone...

1. Give and example of a case that has both a categorical and quantitative variable someone might be interested in examining. 2. Describe an instance where a graph/chart/histogram/etc. or a median/mean given that was misleading and did not reveal the whole situation.

1.In the production of pizza, which of the following four variables is NOT an input variable?...

1.In the production of pizza, which of the following four variables is NOT an input variable? a.The amount of dough prepared for the pizza b.The temperature of the oven c.The type of chees on the pizza d.The time that the customer leaves the pizza in the refrigerator 2. The Just-In-Time production is associated with a system. a.Push b.Pull

Which of the following variables are qualitative and which arequantitative? If the variable is quantitative,...

Which of the following variables are qualitative and which are quantitative? If the variable is quantitative, then specify whether the variable is discrete or continuous.a. Colors of cars in a mall parking lot.QualitativeQuantitative; discreteQuantitative; continuousb. Time it takes each student to complete a final exam.QualitativeQuantitative; discreteQuantitative; continuousc. The number of patrons who frequent a restaurant.QualitativeQuantitative; discreteQuantitative; continuous

For the following variables, identify which is the Independent Variable and the Dependent Variable. Then create...

For the following variables, identify which is the Independent Variable and the Dependent Variable. Then create a hypothesis (be sure to also include the direction of the relationship) and then create a null hypothesis. Temperature and crime rates Hours studied and test scores Number of police officers and crime rate

2. For each of the following variables, indicate if it is quantitative or categorical and also...

2. For each of the following variables, indicate if it is quantitative or categorical and also indicate the scale of measurement used for each: The Gender of an individual The Weight(pounds) of a package The Income(dollars) of an individual The Distance(miles) between two cities