Question

Which of the following situations
do **not**involve a discrete random variable? There may be
more than one answer. (Note that you are only asked to identify the
type of variable; you do not need to try to solve any of
them.)

The average length of time a call to company

Q's helpline takes is 8.53 minutes. Assuming that the times are
normally distributed and there is a 50% chance that a call lasts
for less than 8.53 minutes, estimate the standard
deviation.

500 people were surveyed on the number of pets they
own. 27% of the people said that they owned no pets; 33% of the
people said they owned dogs. If four of the surveyed people are
selected at random, what is the probability that exactly one of
them owns a dog?

An experiment consists of flipping coins and counting
how many times the coin comes up heads. What is the probability
that, in 17 flips, we will get 10 heads?

Students in Ms. Pearson's class have an average height
of 40 inches,. What is the probability that a randomly-selected
student will be more than 42 inches tall?

Answer #1

In first case, the average length of time a call to company
takes is a random variable, but not a discrete variable. As here
time is a **continuous variable**.

In second case, as there are 0,1,2,3 or 4 can be the values of
the random variable that is number of person out of 4 that own a
dog. So here that variable is a **discrete
variable**.

Here in third case, number of heads are a **discrete
variable**.

Here in fourth case, the height of person is a
**continuous variable**, not a discrete variable.

________I. Which of the following is an example of a discrete
random variable?
The weight of a box of cookies
The length of a window frame
The number of houses in a development
The distance from home to school
________II. The following table shows the population probability
distribution of x, the random variable representing the price per
ticket, in dollars, for 20 upcoming concerts at a certain
community’s civic center.
Price
per ticket
($)
P(x)
45
0.20...

Consider the following question and determine if the random
variable X is Continuous or
Discrete. Select a distribution to use
from the options to find the exact probability in question. Select
either Uniform, Binomial,
Poisson, Normal, or
Exponential. Do not solve the problem simply
explain how you arrived at your conclusion when selecting the
random variable and the selected distribution.
Question:
You have taken a sample from a batch of parts and have averaged
the diameter of the parts in...

1. A coin is tossed 3 times. Let x be the random discrete
variable representing the number of times tails comes up.
a) Create a sample space for the event;
b) Create a probability distribution table for the discrete
variable
x;
c) Calculate the expected value for x.
2. For the data below, representing a sample of times (in
minutes) students spend solving a certain Statistics problem, find
P35, range, Q2 and IQR.
3.0, 3.2, 4.6, 5.2 3.2, 3.5...

I know this is more than one question but it is one
problem on my homework that I keep missing. Please help. Business
Analysis 2372. I keep missing half of them and only have one more
try. Thanks
Think of observing a large number of independent "trials," or
repeats, of some random experiment and let E be some event of
interest. For example, the experiment could represent flipping a
(possibly weighted) coin or rolling a (possibly weighted) die
thousands of...

Multiple Choice
Select the best answer from the available choices for each
question.
Which of the following is NOT part of the definition of
a sample space S?
S can be discrete or continuous
Each outcome must be in S at most once
Each element in S is equally likely
Each outcome must be in S at least once
S is a set of possible outcomes in an experiment
Three A’s, three B’s, and two C’s are arranged at
random...

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