long gation

Question 1

Use the numbers below for this problem only

• X   Y
  4    1
  -6    1
  1    -3
  7    8
  -8    2
  6    6
  6    -7

(?X)(?Y) =Use the numbers below for this problem only
X   Y
4    8
-7    5
0    -2
2    5
-3    2
6    2
3    -0

?(X + 2Y)=Use the numbers below for this problem only

 X Y
1    7
-4    4
0    -5
0    3
-8    6
4    8
3    -4

(?X)2 + ?Y =Use the numbers below for this problem only

X Y
4    6
-8    5
8    -8
2    8
-0    5
4    0
7    -7

?XY =Use the numbers below for this problem only

X Y
0    7
-1    3
7    -1
4    3
-4    1
3    8
3    -8

(?X) – (?Y) =

Question 7

The following histogram presents a summary of the results of a questionnaire given to a sample of adult online students at OU. The students were asked how many hours per week they study for PSY 1110. The number of hours per week spent on study has been grouped into intervals, and the frequency indicates the number of students in each interval. (Note: all lines in the histogram were intended to be black, so treat blue lines as if they were black–in other words the color difference is not meaningful.) 

(HINT:  Convert the histogram to a Grouped Frequency Distribution in order to answer the questions below.  The “Creating a Grouped Frequency Distribution from a Histogram” document under Instruction Materials will be helpful.)
 

 

For each answer, enter the numeric value:

What is the sample size?

The _______th percentile is associated with 10.5 hours of study?

How many students studied between 11 and 20 hours per week?

What value (hours of study) is associated with the 50th percentile?

This question is based on a sample summarized in the stemplot below. (Use the numbers below only for this question.)

At a high-end shoe store, customers were asked how many pairs of shoes they owned. Systematic random sampling was used. These are their answers.

Stem

Leaf

0

2 4 5 8

1

0 3 5 8

2

0 2 4 7

Compute the following. When necessary round your final answer to 2 decimal places. Enter only the number answer; do not include a word label.

What is the value of the mean for the above data?Questions 11 to 14 are based on a sample summarized in the stemplot below.

At a high-end shoe store, customers were asked how many pairs of shoes they owned. Systematic random sampling was used. These are their answers.

Stem

Leaf

0

5 6 8

1

2 6 6 9

2

0 1 2 3

Compute the following. When necessary round your final answer to 2 decimal places. Enter only the number answer; do not include a word label.

What is the value of the median for the above data?Questions 11 to 14 are based on a sample summarized in the stemplot below.

At a high-end shoe store, customers were asked how many pairs of shoes they owned. Systematic random sampling was used. These are their answers.

Stem

Leaf

0

5 6 8

1

2 6 6 9

2

0 1 2 3

Compute the following. When necessary round your final answer to 2 decimal places. Enter only the number answer; do not include a word label.

What is the value of the mode for the above data?Questions 11 to 14 are based on a sample summarized in the stemplot below.

At a high-end shoe store, customers were asked how many pairs of shoes they owned. Systematic random sampling was used. These are their answers.

Stem

Leaf

0

5 6 8

1

2 6 6 9

2

0 1 2 3

Compute the following. When necessary round your final answer to 2 decimal places. Enter only the number answer; do not include a word label.

What is the value of the range for the above data?Questions 11 to 14 are based on a sample summarized in the stemplot below.

At a high-end shoe store, customers were asked how many pairs of shoes they owned. Systematic random sampling was used. These are their answers.

Stem

Leaf

0

5 6 8

1

2 6 6 9

2

0 1 2 3

Compute the following. When necessary round your final answer to 2 decimal places. Enter only the number answer; do not include a word label.

What is the value of the interquartile range for the above data?

An ER nurse cared for ten patients during her shift, and she kept track of their reported levels of pain on a scale of 0 to 10 (with 0 representing no pain and 10 representing the worst pain ever experienced).  The pain ratings from the sample of 10 patients were as follows:

1, 3, 3, 4, 5, 7, 8, 8, 9, 10

What was the variance of the pain ratings?In the data set below, which value constitutes an outlier?

748.787, 680.975, 685.610, 731.041, 696.539, 721.882, 679.133, 367.618, 707.776, 679.775, 674.353, 678.976A grouped frequency distribution

Refers to a very simple frequency table with no intervals.

Is used for a large data set to organize the data using class intervals.

Is used to construct a pie chart.

Is used to bake a pie.

Refers to the measure of the degree to which a distribution is symmetrical.

The distribution represented by the histogram in Question 7 above is best described as

Bimean

Bimedian

Bimodal

Bisect

Bimodule

The histogram in Question 7 above is

Normally distributed

Positively skewed

Negatively skewed

Asymmetric

Symmetric

A grouped frequency distribution

Refers to a very simple frequency table with no intervals.

Is used for a large data set to organize the data using class intervals.

Is used to construct a pie chart.

Is used to bake a pie.

Refers to the measure of the degree to which a distribution is symmetrical. 

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