Seating at GC I Thinking back again to the m111survey data frame, recall that the variable seat records where each subject prefers to sit in a classroom: Front, Middle, or Back. Here is a table of the results: gcSeat <- xtabs(~seat,data=m111survey) gcSeat ## seat ## 1_front 2_middle 3_back ## 27 32 12 Now at Georgetown most classrooms are fairly small, with at about four rows actually in use: the first row is obviously the Front; most people would think of the second and third rows as the Middle; the fourth row would count as the Back. If preferences for the four rows are exactly the same out there in the GC population, then one would expect that: 25% of the population prefers the Front; 50% prefer the middle (twice as many rows in the Middle, after all); 25% prefer the back. We wonder if the available data provide strong evidence against the idea of equal preference among all four rows. Since seat is a factor variable, it makes sense to investigate our Research Question with chisqtestGC(). We define parameters and hypotheses as follows: Let pf = the proportion of all GC students who prefer the Front. pm = the proportion of all GC students who prefer the Middle. pb = the proportion of all GC students who prefer the Back. The Hypotheses are: H0: pf = 0.25, pm = 0.50, pb = 0.25. Ha: At least one of the values in H0 is not correct. Which of the following bits of R-code would do the job for us? (There are three correct answers.) Group of answer choices ( ) chisqtestGC(gcSeat, p=c(0.33,0.33,0.33)) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.25,0.50,0.25)) ( ) chisqtestGC(~Seat,data=m111survey, p=c(0.25,0.50,0.25)) ( ) chisqtestGC(gcSeat,p=c(0.25,0.50,0.25)) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.25,0.50,0.25), simulate.p.value=TRUE,B=5000) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.33,0.33,0.33))

Seating at GC I Thinking back again to the m111survey data frame, recall that the variable seat records where each subject prefers to sit in a classroom: Front, Middle, or Back. Here is a table of the results: gcSeat <- xtabs(~seat,data=m111survey) gcSeat ## seat ## 1_front 2_middle 3_back ## 27 32 12 Now at Georgetown most classrooms are fairly small, with at about four rows actually in use: the first row is obviously the Front; most people would think of the second and third rows as the Middle; the fourth row would count as the Back. If preferences for the four rows are exactly the same out there in the GC population, then one would expect that: 25% of the population prefers the Front; 50% prefer the middle (twice as many rows in the Middle, after all); 25% prefer the back. We wonder if the available data provide strong evidence against the idea of equal preference among all four rows. Since seat is a factor variable, it makes sense to investigate our Research Question with chisqtestGC(). We define parameters and hypotheses as follows: Let pf = the proportion of all GC students who prefer the Front. pm = the proportion of all GC students who prefer the Middle. pb = the proportion of all GC students who prefer the Back. The Hypotheses are: H0: pf = 0.25, pm = 0.50, pb = 0.25. Ha: At least one of the values in H0 is not correct. Which of the following bits of R-code would do the job for us? (There are three correct answers.) Group of answer choices ( ) chisqtestGC(gcSeat, p=c(0.33,0.33,0.33)) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.25,0.50,0.25)) ( ) chisqtestGC(~Seat,data=m111survey, p=c(0.25,0.50,0.25)) ( ) chisqtestGC(gcSeat,p=c(0.25,0.50,0.25)) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.25,0.50,0.25), simulate.p.value=TRUE,B=5000) ( ) chisqtestGC(~seat,data=m111survey, p=c(0.33,0.33,0.33))

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 15PPS

See similar textbooks

Seating at GC I

Thinking back again to the m111survey data frame, recall that the variable seat records where each subject prefers to sit in a classroom: Front, Middle, or Back.

Here is a table of the results:

gcSeat <- xtabs(~seat,data=m111survey)
gcSeat

## seat
## 1_front 2_middle 3_back
## 27 32 12

Now at Georgetown most classrooms are fairly small, with at about four rows actually in use:

the first row is obviously the Front;
most people would think of the second and third rows as the Middle;
the fourth row would count as the Back.

If preferences for the four rows are exactly the same out there in the GC population, then one would expect that:

25% of the population prefers the Front;
50% prefer the middle (twice as many rows in the Middle, after all);
25% prefer the back.

We wonder if the available data provide strong evidence against the idea of equal preference among all four rows.

Since seat is a factor variable, it makes sense to investigate our Research Question with chisqtestGC(). We define parameters and hypotheses as follows:

Let

pf = the proportion of all GC students who prefer the Front.

pm = the proportion of all GC students who prefer the Middle.

pb = the proportion of all GC students who prefer the Back.

The Hypotheses are:

H0: pf = 0.25, pm = 0.50, pb = 0.25.

Ha: At least one of the values in H0 is not correct.

Which of the following bits of R-code would do the job for us? (There are three correct answers.)

Group of answer choices

( ) chisqtestGC(gcSeat,
p=c(0.33,0.33,0.33))

( ) chisqtestGC(~seat,data=m111survey,
p=c(0.25,0.50,0.25))

( ) chisqtestGC(~Seat,data=m111survey,
p=c(0.25,0.50,0.25))

( ) chisqtestGC(gcSeat,p=c(0.25,0.50,0.25))

( ) chisqtestGC(~seat,data=m111survey,
p=c(0.25,0.50,0.25),
simulate.p.value=TRUE,B=5000)

( ) chisqtestGC(~seat,data=m111survey,
p=c(0.33,0.33,0.33))

Expert Solution

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Data Collection, Sampling Methods, and Bias$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Recommended textbooks for you

Glencoe Algebra 1, Student Edition, 9780079039897…

Algebra

ISBN:

9780079039897

Author:

Carter

Publisher:

McGraw Hill