Answer:
Steve is first
Step-by-step explanation:
1/3 because reciprocal is the opposite
Answer:
water reflects 5.6 times as many uv rays as sand
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Step-by-step explanation:
sand: 0.15
water: 21/25 --> 0.84
0.84/0.15= 5.6
therefore, water reflects 5.6 times as many uv rays as sand
Answer:
Step-by-step explanation:
<u>Total frequencies:</u>
Median group is the containing the middle - 25th and 26th frequencies. This is the 11-15 interval.
<u>Estimated median formula:</u>
- Estimated Median = L + ((n/2) − B)/G* w, where
- L - lower class boundary of the group containing the median = 10.5
- n - total number of values = 50
- B - cumulative frequency of the groups before the median group = 6 + 15 = 21
- G - frequency of the median group = 20
- w - group width = 5
<u>Substitute values and work out the number:</u>
- Estimated Median = 10.5 + (50/2 - 21)/20*5 = 11.5
The interquartile range (IQR) can be found by finding the difference of the upper and lower quartiles