You can surely do this! First, find the mean of the 8 given scores. Add up these scores and then divide the result (sum) by 8 to obtain the mean.
raw score - mean
The formula for "z-score" is z = -------------------------
std. deviation
You'll need to calculate the standard deviation of these 8 scores.
73 - mean
Then, as an example: raw score 73 translates into z-score z = ---------------
std. dev.
Answer:
i hope my answer help u
Step-by-step explanation:
it will be 10 classrooms
cuz 75min. = 5 ×15min.
and he said that the custodian can clean 2 classrooms in 15 min.
so we will do 2 × 5 = 10 classroons in 75 minutes
Answer: D)0.205
Step-by-step explanation:
In binomial distribution, the probability of getting success in x trials is given by :-
, where n is the total number of trials , p is the probability of getting success in each trial .
Given : The probability that a component will fail is 0.2.
Let x be the number of components will stop working.
i.e. p=0.2
n=12
Since The machine will stop working if more than three components fail.
Then, the probability that the machine will stop working will be :-
Hence, the probability that the machine will stop working is 0.205.
Thus , the correct answer is D)0.205
Since the outside is 1.5 to 1, we take half of the value of the inside diameter and add it to itself to get the smallest value needed. 0.5+0.25=0.75
So the smallest diameter possible would be 0.75 inches.