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Select each of the true statements from the following?

Select each of the true statements from the following?

Select each of the true statements from the following?

Description

Consider the following data frame of daily air quality measurements made in New York City:

MonthTempOzoneWindSolar.RJun907113.8291Jul88827.4213Sep69710.349Aug908910.3229Sep87477.495Sep73249.7259May65238.6299

where

Month is the month during which the measurement was made

Temp is the maximum daily temperature (in Fahrenheit)

Ozone is the mean ground level ozone concentration (in ppb)

Wind is the average wind speed (in mi/hr)

Solar.R is the solar radiation (in Langleys) in the visible range

Select each of the true statements from the following:

a. The number of variables is 35.

b. The number of cases 35.

c. The value of the 5th variable on the 3rd case is 49.

d. The value of the 3rd variable on the 5th case is 47. 

e. All of the variables are quantitative.

2-

Consider the following data frame from a marketing study on US breakfast cereals:

vitaminsmfrshelfcarbocaloriessugarssodiumfibre100%KC20.00100.003.00320.001.00enrichedGB12.00110.0013.00180.000.00enrichedGC24.00173.3310.67280.002.67enrichedGA13.6088.000.80232.001.60enrichedRA22.00110.003.00280.000.00enrichedQC28.00200.0012.00270.004.00enrichedKC30.00180.0012.000.004.00enrichedKA21.00100.002.00290.001.00enrichedGB17.33160.0012.00280.000.00enrichedGB14.0073.332.00173.330.00enrichedPC19.40134.337.46313.437.46enrichedPA12.50113.6417.0551.140.00

where

vitamins indicates whether additional vitamins and minerals were introduced in the manufacturing process and takes the values noneenriched, or 100%

mfr is the manufactuer of the cereal, with G=General Mills, K=Kelloggs, N=Nabisco, P=Post, Q=Quaker Oats, and R=Ralston Purina

shelf is the display shelf the cereal is typically sold on (a proxy for the cereal’s cost tier)

carbo is the grams of complex carbohydrates in one serving

calories is the number of calories in one serving

sugars is the grams of sugars in one serving

sodium is the milligrams of sodium in one serving

fibre is the grams of dietary fiber in one serving

Select each of the true statements from the following:

a. The number of variables is 8.

b. The number of cases is 8.

c. The value of the 6th variable on the 8th case is 4.

d. The value of the 8th variable on the 6th case is 2.

e. All of the variables are quantitative.

3-Consider the following data frame of seismic events (i.e., earthquakes) recorded near the island of Fiji:

latlongdepthstations-28.23182.687420-25.23179.8647629-26.18178.5954865-20.04181.8757719-23.00170.704320-23.46180.1754132-24.27179.8852324-13.44166.534427

where

lat is the latitude of the seismic event

long is the longitude of the seismic event

depth is the depth (in km) of the seismic event

stations is the number of seismograph stations that reported the event

Select each of the true statements from the following:

a. The number of variables is 4.

b. The number of cases 8.

c. The value of the 2nd variable on the 3rd case is 178.59.

d. The value of the 3rd variable on the 2nd case is 476.

e. All of the variables are quantitative. 

Explanation & Answer:

3 Questions

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