Question

few questions

Answer 1

- The table shows data for a class's mid-term and final exams
Which data set has the smallest IQR?
They have the same IQR.

Mid-term exams

Final exams

There is not enough information

-The table shows data from a survey about the number of times families travel by car or taxi during an average week. The families are either from a rural town (population under 5,000) or a large city (population over 1 million):
Which of the choices below best describes how to measure the center of this data?
Both centers are best described with the mean.

Both centers are best described with the median.

The country data center is best described by the mean. The city data center is best described by the median.

The country data center is best described by the median. The city data center is best described by the mean.

-The table shows data from a survey about the amount of time students spend doing homework each week. The students were either in college or in high school
Which of the choices below best describes how to measure the spread of this data?
(Hint: Use the minimum and maximum values to check for outliers.)
Both spreads are best described with the IQR.

Both spreads are best described with the standard deviation.

The college spread is best described by the IQR. The high school spread is best described by the standard deviation.

The college spread is best described by the standard deviation. The high school spread is best described by the IQR.

-The box plots show attendance at a local movie theater and high school basketball games:
Which of the following best describes how to measure the spread of the data?

The IQR is a better measure of spread for movies than it is for basketball games.

The standard deviation is a better measure of spread for movies than it is for basketball games.

The IQR is the best measurement of spread for games and movies.

The standard deviation is the best measurement of spread for games and movies

Answer 2

where is the sets of data?

Answer 3

sorry im getting them now
-
Mid-Term

Final

96 100
95 85
92 85
90 83
87 83
86 82
82 81
81 78
80 78
78 78
73 75
that's for the first one

Answer 4

Rural Town

City

5 0
6 0
7 1
8 1
15 5
25 8
25 9
35 10
36 12
40 18
42 38
second one

Answer 5

High

Low

Q1

Q3

IQR

Median

Mean

σ


College
50 5 7.5 15 7.5 11 13.8 6.4

High School
16 0 9.5 14.5 5 13 10.7 5.3
third one

Answer 6

ok so you have to find mean and median for both the sets to do any actual comparison.

Answer 7

forth one

Answer 8

okay sorry I am having really bad connection and yeah there fixing it tomorrow but any way so... are we working on the first one?

Answer 9

@aryandecoolest

Answer 10

yeah give a minute..you try yourself there.

Answer 11

ok so IQR is inter quartile range...
start be defining the quartiles and letting q0 and q4 be outliers; the range from q1 to q3 is the IQR.

Answer 12

ay so I got for the mean on the mid term 85.4 and mean for the final I got 73.4 and for the median I got for the mid term 86 and for the final I got 82.

Answer 13

is that right @aryandecoolest

Answer 14

yeah!! but you should find out smallest Iqr in first one, you know how to calculate iqr,right?

Answer 15

11 elements, divide by 4 to define positional quartiles

the value in the 11*0/4 th position is q0
the value in the 11*1/4 th position is q1
the value in the 11*2/4 th position is q2
the value in the 11*3/4 th position is q3
the value in the 11*4/4 th position is q4

if you get a decimal, rnd up to the next value
if you get a value without a decimal, you would have to average some elements...

Answer 16

Ah! it's A. for first one

Answer 17

yeah that's what I was starting to think

Answer 18

thanks ..... number 2

Answer 19

awesome)

Answer 20

now in second you have to find mean and medians in order to compare.

Answer 21

well for third one...
Calculate for both College and High School...

How many standard deviations from the Mean to the Minimum?
How many standard deviations from the Mean to the Maximum?
as far i think it should be... (C)The college spread is best described by the IQR. The high school spread is best described by the standard deviation.

Answer 22

okay well for the second one I got for the mean I got 22.1 and 9.2 and for the median I got 25 and 8

Answer 23

so I think the second one is c to am I right @aryandecoolest

Answer 24

yeah you are :) @danibear401