# Statistic exam | Mathematics homework help

Don't use plagiarized sources. Get Your Assignment on
Statistic exam | Mathematics homework help
Just from \$13/Page
1. The portion of the universe that has been selected for analysis is called:
 Answer a sample a frame a parameter a statistic

Question 2

One of the advantages of a pie chart is that it clearly shows that the total of all the categories of the pie adds to 100%.

True

False

Question 3

Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated location on the Los Angeles freeway system?

 Answer published sources experimentation surveying observation

Question 4

The coefficient of variation is a measure of the central tendency in the data.

True

False

Question 5

Which of the following is NOT a measure of central tendency?

 Answer the arithmetic mean the geometric mean the mode the interquartile range

Question 6

A Pareto diagram is a bar chart in which the bars are naturally arranged with a decreasing pattern:

True

False

-Question 7

If two events are collectively exhaustive, what is the probabiltiy that one or the other occurs?

 Answer 0 .50 1.00 Can not be determined with the information given

Question 8

The cross-tabulation of two categorical variables leads to a contingency table:

True

False

Question 9

A business venture can result in the following outcomes (with their corresponding chance of occuring in parenthesis); Highly Successful (10%), Successful (25%), Break Even (25%), Disappointing (20%), and Highly Disappointing (?). If these are the only outcomes possible for the business venture, what is the chance that the business venture will be considered Highly Disappointing?

4 points

Question 10

A population consists of all the possible objects to be studied:

True

False

4 points

Question 11

An economics professor bases his final grade on homework, two midterm examinations, and a final examination. The homework counts 10% toward the final grade, while each midterm counts 25%. The remaining porttion consists of the final exam. If a student scored 95% in homework, 70% on the first midterm, 96% on the second midterm, and 72% on the final exam, his final average is 79.8%

True

False

4 points

Question 12

If event A and Event B cannot occur at the same point in time, then events A and B are said to be

 Answer mutually exclusive statistically independent collectively exhaustive none of the above

4 points

Question 13

Thirty-six of the staff of 80 teachers at a local intermediate school are certified in Cardio-Pulmonary Resuscitation (CPR). In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR

 Answer 5 Days 45 Days 65 days 81 Days

4 points

Question 14

If we randomly draw a ball from a bag with a finite number of balls in it, then put the ball back into the bag and randomly draw another ball from the bag, this is an example of sampling with replacement

True

False

4 points

Question 15

The Standard Normal distribution has a mean of 1 and a standard deviation of 1.

True

False

4 points

Question 16

Marginal probability is also called

 Answer Simple probability Conditional probability Joint probability Bayes’ theorem

4 points

Question 17

If n = 10 and p = 0.70, then the standard deviation of the binomial distribution is

4 points

Question 18

In its standardized form, the normal distribution

 Answer has a mean of 0 and a standard diviation of 1. has a mean of 1 and a variance of 0. has an area equal to .05 cannot be used to aprroximate discrete probability distribution.

4 points

Question 19

The “empirical rule” for the bell-shaped curve states that the percentage of data points falling within three standard deviations away from the mean is 99.7%

True

False

4 points

Question 20

Distribution 1 is a skewed distribution and Distribution 2 is a symmetric distribution (not Normal distribution). Similar sample sizes will be required for the sample mean of random samples from the two distributions to have an approximate Normal distribution.

True

False

4 points

Question 21

The null hypothesis Ho always contains an equal sign

True

False

4 points

Question 22

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the probability that a randomly selected college student will find a parking spot in the library parking lot in less than 3 minutes.

4 points

Question 23

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distiribution that 75.8% of the college students exceed when trying to find a parking spot in the library parling lot.

 2.8 minutes 3.2 minutes 3.4 minutes 4.2 minutes

4 points

Question 24

The fact that the sample means are less variable than the population data can be observed form the standard error of the mean.

True

False

4 points

Question 25

In left-skewed distribution, the median is

 Answer   equal to the mean greater than the mean less than the mean none of the above

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Homework Writing Services
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Education
Great work. Keep it up
Customer 463647, December 22nd, 2022
Military
Excellent job
Customer 456821, November 30th, 2022
History
Thank you so much for the help. This work is everything I could have asked for and more.
Customer 454439, June 8th, 2020
Statistics
super professional
Customer 462485, May 17th, 2022
ASCI 491 Operational Applications in Aeronautics
Excellent. Ensure your color selections enhance group presentations.
Customer 457731, March 29th, 2022
Health Care Management
THANKS!
Customer 463009, May 23rd, 2022
Human Resources Management (HRM)
Customer 462499, May 21st, 2022
Sociology
Excellent and fast work! Thanks!
Customer 454259, April 11th, 2020
Environmental studies and Forestry
Good work.
Customer 458115, June 6th, 2022
As I expected.
Customer 460551, December 15th, 2021
Public Health
Good work
Customer 452657, February 14th, 2020
Retail
Thank you for your work. Some sentences required minimal edits for clarification/explanation. In the future, please review your sentences for clarity and readability. Consider also reading out loud before submitting. We look forward to future contributions.
Customer 463469, October 21st, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend