Stat 200 quiz 2 | Mathematics homework help

STAT 200 FALL 2015  QUIZ 2 WEEKS 3,4 & 5






1.  What is the BEST measure of the central tendency for the following set of numbers:

18, 34, 56, 67, 875


a. Mean

b. Median

c. Mode

d. Standard Deviation

e. None of above


2.  Which of the following is/are measure(s) of variability? (select all that apply)


a. mean

b. range

c. mode

d. variance

e. linear transformation


3.  For a set of numbers, if the mean is equal to the median, its distribution might be:


a. Right-skewed

b. Left-skewed

c. Normally distributed

d. Positively-skewed


4.  In the graph, there are two distrubitions and we can tell (check all that apply):

a. The mean of distribution A> the mean of distribution B

b. The mean of distribution A < the mean of distribution B

c. The standard deviation of distribution A> the std deviation of distribution B

d. The standard deviation of distribution A= the st deviation of distribution B


5.  Which of the following can measure variability? (Select all that apply)


a. mean

b. median

c. range

d. variance

e. standard deviation

f. Interquartile range

6.  A researcher collected BMI (Body Mass Index) of 50 students in an Engineering school. He found the mean BMI was much smaller than the median BMI. The reason for this might be:


a. Several students had much smaller BMI scores than the other students

b. Several students had much larger BMI scores than the rest

c. The researcher made some measurement errors

d. All the students had smaller BMI scores, compared to national average


7.  There are 20 coupons rolled up and placed inside round plastic balls in a box. There are 3 different types of coupons: 10 of them can be redeemed for “free drinks”, 5 can be redeemed for “free desserts”, and 5 can be redeemed for “free entrees”. If you shake the box and then randomly select one coupon. What’s the probability that you will get a free entree coupon?


8.  Mary was tossing a coin. She tossed three times. What’s the probability that at the first toss she gets a head, the second toss she gets a tail at and the third time she get a tail?


9.  Alice tossed a six-sided die three times. What’s the probability that she gets ones on all three throws?


10.  Imagine a city with 50,000 people. Twenty percent of the population consists of children younger than five years of age. For the children under five years old, the base rate of malnutrition is 6%. How many children under five years of age in that city are malnourished?


11.  Which of the following pairs are NOT independent events?


a. Flipping a coin twice

b. Throwing a die twice

c. Drawing a heart from a set of pokers card, putting it back, and then drawing another heart.

d. Drawing a heart from a set of pokers card, not putting it back and then drawing a diamond.


12.  Consider a normal distribution with a mean of 20 and standard deviation of the mean of 6. 68% of its area is within:


a. One standard deviation of the mean

b. Two standard deviations of the mean

c. Three standard deviations of the mean

d. It depends on the value of the mode


13.  A normal distribution with a mean of 10 and standard deviation of 5. What is the corresponding Z score for a case having a value of 7?


14.  Consider a normal distribution with a mean of 5 and standard deviation of 4. Approximately, what proportion of the area lies between values of -3 and 13.


a. 95%

b. 68%

c. 99%

d. 50%



15.  A binomial distribution is a probability distribution for ____ events for which there are ___ possible outcomes


a. Independent; two

b. Dependent; two

c. Independent; multiple

d. Dependent; Multiple


16.  If we want to estimate the average height of students in an elementary school, which of the following situations can certainly cause bias in our estimation?


a. If the rulers we use systematically overestimate the students’ heights

b. If we only sample the female students in that elementary school

c. If we use random sampling method to select students

d. If we only selected students who were eager to participate in the study


17.  The sampling variability of a statistic refers to how much the statistic varies from sample to sample and is usually measured by its:


a. standard error

b. standard deviation

c. average

d. median


18.  A graduate school Professor wanted to know average age of students in his class. He randomly selected five students and obtained their ages. Their ages were 26, 32, 22, 21, and 25 years. What’s the standard error of the mean from our sample estimation?


19.  Which of the assumption is NOT required to compute a confidence interval for the difference between two means?


a. The two populations have the same variance.

b. The populations are normally distributed.

c. Each value is sampled independently from each other value.

d. The two populations have the similar means.


20.  For a t distribution with 1,000 degrees of freedom, 99% of the distribution is within how many standard deviations of the mean?


a. One

b. Two

c. Three

d. Four




NAME:____________________________  DATE:________________________

STAT 200 FALL 2015  QUIZ 1  ANSWER SHEET  (20 @ 0.5 PTS EACH = 10 POINTS)




























Calculate your paper price
Pages (550 words)
Approximate price: -

Why Choose Us

Quality Papers

We value our clients. For this reason, we ensure that each paper is written carefully as per the instructions provided by the client. Our editing team also checks all the papers to ensure that they have been completed as per the expectations.

Professional Academic Writers

Over the years, our Acme Homework has managed to secure the most qualified, reliable and experienced team of writers. The company has also ensured continued training and development of the team members to ensure that it keep up with the rising Academic Trends.

Affordable Prices

Our prices are fairly priced in such a way that ensures affordability. Additionally, you can get a free price quotation by clicking on the "Place Order" button.

On-Time delivery

We pay strict attention on deadlines. For this reason, we ensure that all papers are submitted earlier, even before the deadline indicated by the customer. For this reason, the client can go through the work and review everything.

100% Originality

At Essay USA, all papers are plagiarism-free as they are written from scratch. We have taken strict measures to ensure that there is no similarity on all papers and that citations are included as per the standards set.

Customer Support 24/7

Our support team is readily available to provide any guidance/help on our platform at any time of the day/night. Feel free to contact us via the Chat window or support email:

Try it now!

Calculate the price of your order

We'll send you the first draft for approval by at
Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

Essay USA has stood as the world’s leading custom essay writing services providers. Once you enter all the details in the order form under the place order button, the rest is up to us.


Essay Writing Services

At Essay USA, we prioritize on all aspects that bring about a good grade such as impeccable grammar, proper structure, zero-plagiarism and conformance to guidelines. Our experienced team of writers will help you completed your essays and other assignments.


Admission and Business Papers

Be assured that you’ll definitely get accepted to the Master’s level program at any university once you enter all the details in the order form. We won’t leave you here; we will also help you secure a good position in your aspired workplace by creating an outstanding resume or portfolio once you place an order.


Editing and Proofreading

Our skilled editing and writing team will help you restructure you paper, paraphrase, correct grammar and replace plagiarized sections on your paper just on time. The service is geared toward eliminating any mistakes and rather enhancing better quality.


Technical papers

We have writers in almost all fields including the most technical fields. You don’t have to worry about the complexity of your paper. Simply enter as much details as possible in the place order section.