MATH 225N Statistics Final EXAM – Chamberlain College of Nursing
MATH 225N Statistics Final EXAM| 95 COMPLETE QUESTIONS WITH
100% RATED CORRECT ANSWERS | 2025 LATEST UPDATED | GET A+
A package delivery service divides their packages into weight classes. Suppose that the packages
in the 14-20 pound class are uniformly distributed, meaning that all weights within that class are
equally likely to occur. The probability density curve is shown below. the probability that a
package weighs between 14 and 18 pounds? - (answer)0.67
A summary of the types of movies showing in a small city, contains five genres. The following
table shows the genres and the associated probability for that type of movie available on a
particular weekend. The table is a probability distribution. If we chose a theater and movie to
attend at random, what probability would we have of seeing anything other than a romantic or
sci-fi movie? - (answer)0.677
A pollotarian is a person who eats poultry but no red meat. A wedding planner does some
research and finds that approximately 3.5% of你是想要一篇“眼睛容易阅读
the people in the area where a large wedding is to
be held are pollotarian. Treat the 300 guests expected
的”中文文章 at the wedding as a simple random sample
from the local population of about 200,000. - (answer)11 people, give or take 3 people
Determine whether the variable would best be modeled as continuous or discrete: The number of
tails when flipping ten coins. - (answer)- Discrete
Find the probability that a z-score will be more than 0.59. - (answer)- 0.2776
Suppose that weights of cans of AJ's brand whipped cream have a population mean of 7.5 ounces
and a population standard deviation of 0.27 ounces and are approximately normally distributed.
Which of the following statements are correct? Choose the best statement. - (answer)All of these
statements are true.
Suppose that the probability that a person books an airline ticket using an online travel website is
0.72. For the questions that follow, consider a sample of ten randomly selected people who
,recently booked an airline ticket. What is the probability that no more than three out of ten
people used an online travel website when they book their airline ticket? Round to the nearest
thousandth. - (answer)- 0.007 [binomcdf(10,0.72,3)]
Five identical poker chips are tossed in a hat and mixed up. Two of the chips have been marked
with an X to indicate that if drawn a valuable prize will be awarded. If you and two of your
friends each draws a chip (with replacement), what is the probability that at least one of your
group of three will win the valuable prize? Round to the nearest thousandth. - (answer)- 0.784
[binomcdf(3,0.6,2)]
Decide whether the experiment is a binomial experiment. If it is not, explain why. You observe
the gender of the next 650 babies born at a local hospital. The random variable represents the
number of boys. - (answer)Binomial experiment
The amount of rainfall in January in a certain city is normally distributed with a mean of 3.7
inches and a standard deviation of 0.6 inches. Find the value of the 25th percentile, rounded to
the nearest tenth. - (answer)- 3.3
你是想要一篇“眼睛容易阅读
的”中文文章
On a multiple choice test with 8 questions, each question has four possible answers, one of which
is correct. For students who guess at all answers, find the standard deviation for the number of
correct answers. - (answer)- 1.2
The Normal distribution below models the distribution of highway gas consumption (in miles per
gallon) for a large collection of SUVs when driving on level roads. The center is shown at 24.8
mpg and the standard deviations reflect the spread of the data. Choose the most accurate
statement. - (answer)The top 2.5% of SUVs get 37.2 mpg or higher.
The probability is 0.1 that a person shopping at a certain store will spend less than $20. For
groups of size 23, find the expected number of shoppers who spend less than $20. - (answer)2.3 [
23*0.1 = 2.3]
, There are four colors in a bag containing 600 plastic chips. It is known that 34% of the chips are
yellow. On average, how many chips from a random sample of 30 (with replacement) would be
expected to be yellow? Round to the nearest whole chip. - (answer)- about 10
The average travel time to work for a person living and working in Kokomo, Indiana is 17
minutes. Suppose the standard deviation of travel time to work is 4.5 minutes and the distribution
of travel time is approximately normally distributed. Approximately what percentage of people
living and working in Kokomo have a travel time to work that is less than 12.5 minutes? Round
to the nearest whole percent. - (answer)- 16% normalcdf(0,12.5, 17,4.5)
Find the probability that a z-score will be between 0.7 and 1.4. - (answer)- 0.1612
Fifty percent of the people that use the Internet order something online. Find the probability that
only four of 9 Internet users will order something online. - (answer)- 0.246 binonpdf(9,0.5,4)
In a recent survey, 72% of the community favored building a health center in their neighborhood.
If 14 citizens are chosen, find the probability that exactly 10 of them favor the building of the
你是想要一篇“眼睛容易阅读
health center. - (answer)- 0.230 binonpdf(14,0.72,10)
的”中文文章
Using the following probability density curve, answer the question. What is the probability that
the random variable has a value less than 2? - (answer)- 0.250
Solar energy is considered by many to be the energy of the future. A recent survey was taken to
compare the cost of solar energy to the cost of gas or electric energy. Results of the survey
revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house
using gas or electric energy had a mean of $98 and a standard deviation of $14. If the distribution
is normal, what percentage of homes will have a monthly utility bill of more than $84? -
(answer)approximately 84%
The peak shopping time at home improvement store is between 8:00am-11:00 am on Saturday
mornings. Management at the home improvement store randomly selected 170 customers last
Saturday morning and decided to observe their shopping habits. They recorded the number of
items that each of the customers purchased as well as the total time the customers spent in the
MATH 225N Statistics Final EXAM| 95 COMPLETE QUESTIONS WITH
100% RATED CORRECT ANSWERS | 2025 LATEST UPDATED | GET A+
A package delivery service divides their packages into weight classes. Suppose that the packages
in the 14-20 pound class are uniformly distributed, meaning that all weights within that class are
equally likely to occur. The probability density curve is shown below. the probability that a
package weighs between 14 and 18 pounds? - (answer)0.67
A summary of the types of movies showing in a small city, contains five genres. The following
table shows the genres and the associated probability for that type of movie available on a
particular weekend. The table is a probability distribution. If we chose a theater and movie to
attend at random, what probability would we have of seeing anything other than a romantic or
sci-fi movie? - (answer)0.677
A pollotarian is a person who eats poultry but no red meat. A wedding planner does some
research and finds that approximately 3.5% of你是想要一篇“眼睛容易阅读
the people in the area where a large wedding is to
be held are pollotarian. Treat the 300 guests expected
的”中文文章 at the wedding as a simple random sample
from the local population of about 200,000. - (answer)11 people, give or take 3 people
Determine whether the variable would best be modeled as continuous or discrete: The number of
tails when flipping ten coins. - (answer)- Discrete
Find the probability that a z-score will be more than 0.59. - (answer)- 0.2776
Suppose that weights of cans of AJ's brand whipped cream have a population mean of 7.5 ounces
and a population standard deviation of 0.27 ounces and are approximately normally distributed.
Which of the following statements are correct? Choose the best statement. - (answer)All of these
statements are true.
Suppose that the probability that a person books an airline ticket using an online travel website is
0.72. For the questions that follow, consider a sample of ten randomly selected people who
,recently booked an airline ticket. What is the probability that no more than three out of ten
people used an online travel website when they book their airline ticket? Round to the nearest
thousandth. - (answer)- 0.007 [binomcdf(10,0.72,3)]
Five identical poker chips are tossed in a hat and mixed up. Two of the chips have been marked
with an X to indicate that if drawn a valuable prize will be awarded. If you and two of your
friends each draws a chip (with replacement), what is the probability that at least one of your
group of three will win the valuable prize? Round to the nearest thousandth. - (answer)- 0.784
[binomcdf(3,0.6,2)]
Decide whether the experiment is a binomial experiment. If it is not, explain why. You observe
the gender of the next 650 babies born at a local hospital. The random variable represents the
number of boys. - (answer)Binomial experiment
The amount of rainfall in January in a certain city is normally distributed with a mean of 3.7
inches and a standard deviation of 0.6 inches. Find the value of the 25th percentile, rounded to
the nearest tenth. - (answer)- 3.3
你是想要一篇“眼睛容易阅读
的”中文文章
On a multiple choice test with 8 questions, each question has four possible answers, one of which
is correct. For students who guess at all answers, find the standard deviation for the number of
correct answers. - (answer)- 1.2
The Normal distribution below models the distribution of highway gas consumption (in miles per
gallon) for a large collection of SUVs when driving on level roads. The center is shown at 24.8
mpg and the standard deviations reflect the spread of the data. Choose the most accurate
statement. - (answer)The top 2.5% of SUVs get 37.2 mpg or higher.
The probability is 0.1 that a person shopping at a certain store will spend less than $20. For
groups of size 23, find the expected number of shoppers who spend less than $20. - (answer)2.3 [
23*0.1 = 2.3]
, There are four colors in a bag containing 600 plastic chips. It is known that 34% of the chips are
yellow. On average, how many chips from a random sample of 30 (with replacement) would be
expected to be yellow? Round to the nearest whole chip. - (answer)- about 10
The average travel time to work for a person living and working in Kokomo, Indiana is 17
minutes. Suppose the standard deviation of travel time to work is 4.5 minutes and the distribution
of travel time is approximately normally distributed. Approximately what percentage of people
living and working in Kokomo have a travel time to work that is less than 12.5 minutes? Round
to the nearest whole percent. - (answer)- 16% normalcdf(0,12.5, 17,4.5)
Find the probability that a z-score will be between 0.7 and 1.4. - (answer)- 0.1612
Fifty percent of the people that use the Internet order something online. Find the probability that
only four of 9 Internet users will order something online. - (answer)- 0.246 binonpdf(9,0.5,4)
In a recent survey, 72% of the community favored building a health center in their neighborhood.
If 14 citizens are chosen, find the probability that exactly 10 of them favor the building of the
你是想要一篇“眼睛容易阅读
health center. - (answer)- 0.230 binonpdf(14,0.72,10)
的”中文文章
Using the following probability density curve, answer the question. What is the probability that
the random variable has a value less than 2? - (answer)- 0.250
Solar energy is considered by many to be the energy of the future. A recent survey was taken to
compare the cost of solar energy to the cost of gas or electric energy. Results of the survey
revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house
using gas or electric energy had a mean of $98 and a standard deviation of $14. If the distribution
is normal, what percentage of homes will have a monthly utility bill of more than $84? -
(answer)approximately 84%
The peak shopping time at home improvement store is between 8:00am-11:00 am on Saturday
mornings. Management at the home improvement store randomly selected 170 customers last
Saturday morning and decided to observe their shopping habits. They recorded the number of
items that each of the customers purchased as well as the total time the customers spent in the
