1. Sit in Groups Lab5_8.31 Effects on Adolescents’ Romantic Ideals
Answer the questions
Compare your answers with your partners
Class discussion

2. (Max-Mix+1)/intervals
Formula
Interval width=
(Max-Mix+1)/intervals
Midpoint
(Li+ Li+1)/2

3. Frequency tables Value Frequency Percentage Midpoint 0-3 11 11.00% 2
Group frequency table
Value
Frequency
Percentage
Midpoint
0-3 11
11.00% 2
4-7 30
30.00% 6
8-11 37
37.00% 10
12-15 12
12.00% 14
16-19
10.00% 18
Grand total
100
100%
The number of times the data value occurs

4. Q1
Populations
The professor is only interested in….
two population distributions

5. 1) the measurement used Q2 2) how many observations
3) specifically who or what is being measured.
The number of loose threads for 15 garments made by a student in the class.

6. Q3
Descriptive statistics
Populations->descriptive statistics
Samples->inferential statistics

7. Q3: Ratio (Does “0” make sense?)
Q4 & Q5
Q3: Ratio (Does “0” make sense?)
Q4: Ordinal ( Ranking?)

8. Q6: operational definition
Order of garment wear out is measured in rankings where the first garment to wear out is labeled as 1, the second as 2, etc. Low rankings represent low quality. The procedures to determine the order of wear out is to place all 15 garments into a washer at the same time and wash on the normal setting.

9. Q6: operational definition
Specific unit of measurement
A description of the process of obtaining that unit of measurement
Easy replication
Clear
No more than 3 sentences

10. Q7
A: 13.93
B : 15
C: 16
D :18
E :19
F: 25.12
G: 5.01

11. Q8 Has a frequency count in the first and last interval
The frequency counts are correct
The frequency percents are correct
The interval widths are equal

12. Q9 There is a title and labels
If the scale on either or both axis do not start at zero then break the axis
Use midpoints not interval
If you are using population data, connect the graph to the x-axis

13. Q10 Reference to measures of central tendency The graph
The skewness statistic 

14. Q10
These data are normally distributed, although the mean is pulled in the negative direction in comparison to the median and there appears to be a slight tail in the negative direction, the skewness statistic of ( ) falls between +/- .76 on the skewness table indicating the distribution is normal enough to continue with parametric statistical analyses.

15. Q10 Reference to measures of central tendency The graph
The skewness statistic 

16. Q11
The mean; the number of loose threads is a continuous variable and is normally distributed.
If it was a continuous variable and skewed, then we would use the median.
If it was a discrete variable, then we would use the mode.