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- 1. Fill in the Blank
The salary ranges of a sample of Australian citizens are collected. One of the class intervals is from $80,000 - <$90,000.
The midpoint of the class interval is: - 2. Multiple Choice
The heat times for the swimmers in a 100m freestyle competition are grouped in the adjacent frequency distribution table.
The number of swimmers in the competition was1
5
11
24
- 3. Multiple Choice
The heat times for the swimmers in a 100m freestyle competition are grouped in the adjacent frequency distribution table.
The median class interval of the data is50 - < 52 seconds
52 - < 54 seconds
54 - < 56 seconds
56 - < 58 seconds
- 4. Multiple Choice
The heat times for the swimmers in a 100m freestyle competition are grouped in the adjacent frequency distribution table.
The modal class interval of the data is50 - < 52 seconds
52 - < 54 seconds
54 - < 56 seconds
56 - < 58 seconds
- 5. Multiple Choice
Advantages of converting raw data into grouped data can include:
Producing more accurate statistics
Enabling easier-to-read graphical representations of the data
Allowing for more efficient estimation of statistics for large datasets
Creating a greater amount of information for statistical analysis
- 6. Multiple Choice
A group of adults is surveyed on the number of hours of sleep which they had the night before.
An estimation of the mean for the data is6.38 hours
7.00 hours
7.41 hours
25.23 hours
- 7. Multiple Choice
A group of adults is surveyed on the number of hours of sleep which they had the night before.
The grouped data median is5.30 hours
5.91 hours
6.68 hours
7.75 hours
- 8. Multiple Choice
A group of adults is surveyed on the number of hours of sleep which they had the night before.
One adult says that they slept for five-and-a-half hours. This value doesn't fit neatly into any class interval becauseIt is not possible to sleep for five-and-a-half hours
"Hours slept" is a continuous variable, but the class intervals are set up for discrete data
"Hours slept" is a categorical variable, but the class intervals are set up for numerical data
"Hours slept" is a discrete variable, but the class intervals are set up for continuous data
- 9. Labeling
Label the final column in the adjacent image
answer choicesStandard Deviation
Mean
Cumulative Frequency
xf
- 10. Multiple Choice
Calculate the frequency of the 90 - 119 class interval.
1
2
3
4
- 11. Math Response
The missing value in the xf column will be
- 12. Drag and Drop
Adjacent is a selection of raw data and the grouped data frequency distribution table generated from it.
The approximation of the mean will be (a) the mean for the raw data.equal tolower thanhigher than - 13. Multiple Choice
Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.
The median level of nitrate is0 - < 3 ppm
3 - < 5 ppm
5 - < 7 ppm
7 - < 9 ppm
- 14. Drag and Drop
Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.
The mean will be (a) the median because the data are (b) .higher thanpositively skewedlower thanequal tonegatively skewedapproximately symmetricuniform - 15. Multiple Choice
Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.
The range of the data is9
11
Unable to be determined from the frequency table.
43
- 16. Fill in the Blank
For the adjacent frequency distribution table, the class intervals will each have a width of what size?
- 17. Multiple Choice
The lengths of rivers in a state are given adjacent.
The mean river length is556.25 kms
580.15 kms
602.40 kms
830.56 kms
- 18. Multiple Choice
The mean for the frequency distribution adjacent is
81.82
94.05
128.61
4.5
- 19. Hotspot
Identify the three mistakes in the frequency distribution table.
Anything highlighted in green as verified as correct already. - 20. Multiple Choice
Lake samples are taken from around the country to assess the nitrate levels in the water. The levels, in parts per million, are given in the frequency distribution table adjacent.
The modal class is0 - < 3
3 - < 5
5 - < 7
7 - < 9
- Answer choicesTagsAnswer choicesTags