There are 8 cars which gives between 30 to 50 miles per gallon.
Step-by-step explanation:
- Stem-and-leaf plot are one of the most classical form of plotting.
- The left hand side of vertical line is stem and right is leaf.
- unit digit is leaf and tenths digit is stem.
- 0-9,10-19,20-29,30-39,40-49,50-59,60-69 is range.
- Plotting is done by the number which comes between the range.
- Example between 10-19 there are two points 19 and 19.
- They use discrete variable not continuous.
- The are easy to understand because discrete is counting numbers.
Answer:
The range is: 13. The population mean is: 8.5. The population variance is: 15.85. The population standard deviation is: 3.9812.
Step-by-step explanation:
The range: 15 - 2 = 13
The population mean is:
Mean = ( 2 + 9 + 15 + 5 + 14 + 8 + 11 + 7 + 4 + 10 ) / 10 = 8.5
The population variance ( S² or Sigma² ):
S ² = 1/10 · ( ( 2 - 8.5 )² + ( 9 - 8.5 )² + ( 15 - 8.5 )² + ( 5 - 8.5 )² + ( 14 - 8.5 )² + ( 8 - 8.5 )² + ( 11 - 8.5 )² + ( 7 - 8.5 )² + ( 4 - 8.5 )² + ( 10 - 8.5 )² )
S ² = 15.85
The population standard deviation:
S = √(S²) = √15.85 = 3.9812
Answer:
56 feet.
Step-by-step explanation:
4k+6k+8k=18k=126⟹k=7
Therefore, the lengths are 4⋅7=28, 6⋅7=42 and 8⋅7=56 feet.
Answer:
D. infinite
Step-by-step explanation:
