Answer:
-2x - 5 (lesser than or equal to) 15
The first quartile of the data set is 28 because it is the median of the lower set.
Answer:
Step-by-step explanation:
3 purple : 1 white
30 arangement will need so
minimum will need (3+1)=4 flowers per 30 arangements =120 flowers
minimum will be (90 purple: 30 white)
Answer:
920 points.
Step-by-step explanation:
We have been given that the mean score for a standardized test is 800 and the standard deviation is 120. To qualify for a special summer camp for accelerated students, a student must score within the top 16% of all scores on the test.
First of all we will find probability of 0.16 using normal distribution table.
Using normal distribution our Z score will be 0.994458
Now we will use raw-score formula to find the score (x) that a student must make to qualify for summer camp.

Upon substituting our given values in above formula we will get,


Upon rounding to nearest whole number we will get,

Therefore, a student must make 920 points to qualify for summer camp.