Let

denote the number of minutes spent brushing his teeth, and let

be the mean and

the standard deviation for this distribution.

The z-score corresponding to this probability is approximately

, which means

Next, (note the sign change)

The corresponding z-score is approximately

, so you have

Solving the two equations for

and

, you'll find that the mean is approximately

and the standard deviation is approximately

.
Answer: i dont know how to solve 3D triangle shapes
Step-by-step explanation:
this is not a prisim
Hello!
I'm assuming we're simplifying here
to simplify, use the distributive property of multiplication
2 * 3x = 6x
2 * (-5) = -10
6x - 10 is your simplified answer
I hope this helps, and have a nice day!
<u>Answer:</u>
The experimental probability is 3% greater than the theoretical probability.
<u>Step-by-step explanation:</u>
We are given the results of flipping two coins with their outcomes and number of times they were tossed.
We are to compare the experimental and theoretical probability of getting HH.
The theoretical Outcomes are: HH HT TH TT
So theoretical probability of getting HH =
= 25%
Total number of outcomes =
= 100
So experimental probability of getting HH =
= 28%
Therefore, the experimental probability is 3% greater than the theoretical probability.