Answer: B and C Is my guess
Step-by-step explanation:
Answer:
34% of lightbulb replacement requests numbering between 39 and 50.
Step-by-step explanation:
The 68-95-99.7 rule states that, for a normally distributed random variable:
68% are within 1 standard deviation of the mean(34% between one standard deviation below and the mean, 34% between the mean and one standard deviation above the mean).
95% are within 2 standard deviations of the mean.
99.7% are within 3 standard deviations of the mean.
In this problem, we have that:
The distribution of the number of daily requests is bell-shaped and has a mean of 50 and a standard deviation of 11.
Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 39 and 50?
50 is the mean
39 is one standard deviation below the mean.
This means that 34% of lightbulb replacement requests numbering between 39 and 50.
Answer:
59
Step-by-step explanation:
you do
80 -7= 73
73-7=66
66-7=59
Answer and explanation:
Given : A driving exam consists of 29 multiple-choice questions. Each of the 29 answers is either right or wrong. Suppose the probability that a student makes fewer than 6 mistakes on the exam is 0.26 and that the probability that a student makes from 6 to 20 (inclusive) mistakes is 0.53.
Let X be the number of mistake
To find : The probability of each of the following outcomes.
a) A student makes more than 20 mistakes
i.e.
b. A student makes 6 or more mistakes
i.e.
c. A student makes at most 20 mistakes
i.e.
Using 'a' part
d. Which two of these three events are complementary?
The complement of an event happening is the exact opposite: the probability of it not happening.
According to definition,
Option a and c are complementary events.
If you note that a square can be circumscribed by a circle (circumscribed is when the object is drawn in...right?) this makes things handy.
Draw a circle with the compass, for the diameter = side length of the square.
Drawing the circle ensures that the side lengths will all be congruent.
Now take your straightedge, and draw 4 sides, 2 sides parallel to each other on 2 outer sides of the circle, and 2 on the top, also parallel, BUT also perpendicular to the other 2 lines. You have a square