Answer:
Min 80, Q1 82, Med. 85.5, Q3 93, Max 100.
90%.
Step-by-step explanation:
Percentage at least 82 = 100 *(100 - 82) / (100-80)
= 90%.
Answer: 7/26
Step-by-step explanation:
7 red and 7 blue = 14 total
7/14 or 1/2 chance of getting red first
7/13 chance of getting red the second time
7/13*1/2 = 7/26
7/26 chance
sorry if it’s wrong but I hope it helps
Answer:
x is a variable, it can be ANY NUMBER
Step-by-step explanation:
We have to define an interval about the mean that contains 75% of the values. This means half of the values will lie above the mean and half of the values lie below the mean.
So, 37.5% of the values will lie above the mean and 37.5% of the values lie below the mean.
In a Z-table, mean is located at the center of the data. So the position of the mean is at 50% of the data. So the position of point 37.5% above the mean will be located at 50 + 37.5 = 87.5% of the overall data
Similarly position of the point 37.5% below the mean will be located at
50 - 37.5% = 12.5% of the overall data
From the z table, we can find the z value for both these points. 12.5% converted to z score is -1.15 and 87.5% converted to z score is 1.15.
Using these z scores, we can find the values which contain 75% of the values about the mean.
z score of -1.15 means 1.15 standard deviations below the mean. So this value comes out to be:
150 - 1.15(25) = 121.25
z score of 1.15 means 1.15 standard deviations above the mean. So this value comes out to be:
150 + 1.15(25) = 178.75
So, the interval from 121.25 to 178.75 contains the 75% of the data values.
If you want a quicker answer on that, use photo math. If you take pictures of all of those individually, youll get your answer. Apologize for not giving an answer to your problem but i figured id let you know because its faster then coming on here and asking.
