1)Assume that the random variable X is normally distributed,
with mean μ = 70 and standard deviation σ = 13.
A)Find P(X ≤ 65) =
B) Find P(X > 55) =
C) Find P(X > 78) =
D) Find P(X > 78) =
2)The length of zebra pregnancies is normally distributed, with
mean μ = 380 and standard deviation σ = 10.
A)Find P(X < 365) =
B)Find P(X > 385) =
1. Suppose that the random variable X is normally distributed
with mean μ = 30 and standard deviation σ = 4. Find a) P(x < 40)
b) P(x > 21) c) P(30 < x < 35) 2. A radar unit is used to
measure speeds of cars on a motorway. The speeds are normally
distributed with a mean of 90 km/hr and a standard deviation of 10
km/hr. What is the probability that a car picked at random is
travelling...
A. Let x be a continuous random variable that is normally
distributed with mean μ=24 and standard deviation σ=4. Use a
graphing calculator to find P(20≤x≤33). The probability is? (Round
to 4 decimal places)
B. Let x be a continuous random variable that is normally
distributed with mean μ=27 and standard deviation σ=4. Use a
graphing calculator to find P(19≤x≤35). The probability is? (Round
to 4 decimal places)
C. Let x be a continuous random variable that is normally
distributed...
Assume the random variable X is normally distributed with mean
=50 and standard deviation =7. Find the 77 th percentile.
The mean incubation time of fertilized eggs is 2020 days.
Suppose the incubation times are approximately normally distributed
with a standard deviation of 11 day.
(a) Determine the 15th percentile for incubation times.
(b) Determine the incubation times that make up the middle
95%.
5. X is a normally distributed random variable with a mean of 8
and a standard deviation of 3. The probability that X is between 6
and 10 is
a. 0.7486
b. 0.4972
c. 0.6826
d. 0.8413
The weight of football players is normally distributed with a
mean of 200 pounds and a standard deviation of 20 pounds.
6. The probability of a player weighing more than 240 pounds
is
a. 0.0197
b. 0.9803
c. 0.4803
d. 0.0228
7. Refer...
Question 1: Assume that the random variable X is normally
distributed, with mean that = 47 and standard deviation that = 7.
Compute the probability. Be sure to draw a normal curve with the
area corresponding to the probability shaded.
P(X< AND = TO 43)
Using technology, what is P(X< AND = TO 43) equal? (round to
four decimal places)
How did you find this answer using a graphing calculator??
Question 2: The mean incubation time for a type of...