N + d = 21
0.5n + 0.10d = 1.35
5n + 10d = 135
d = 21-n
5n + 210 - 10n = 135
-5n = -75
n = 15
d = 6
Answer: I believe the standard deviation will remain the same, 6, choice A.
Step-by-step explanation: Standard deviation is calkculated based on the difference of each point from the mean. If 10 were added to each score, the mean would also increase by 10. That would mean that the difference between the mean and each score would be exactly the same, leading to an identical standard deviation. Sounds crazy, but that's what numbers do for a living.
Answer:
Sorry if this doesn't help:
Step-by-step explanation:
1, Order the data from least to greatest.
2, Find the median.
3, Calculate the median of both the lower and upper half of the data.
4, The IQR is the difference between the upper and lower medians.
Good luck!
Answer: Many
Step-by-step explanation:
