# Qnt 275 week 1 practice set latest 2017 version

Don't use plagiarized sources. Get Your Assignment on
Qnt 275 week 1 practice set latest 2017 version
Just from \$13/Page

University of Phoenix Material

Practice Set 1

## Practice Set 1

1. The following table lists the number of deaths by cause as reported by the Centers for Disease Control and Prevention on February 6, 2015:

 Cause of Death Number of Deaths Heart disease 611,105 Cancer 584,881 Accidents 130,557 Stroke 128,978 Alzheimer’s disease 84,767 Diabetes 75,578 Influenza and Pneumonia 56,979 Suicide 41,149

a)    What is the variable for this data set (use words)?

b)    How many observations are in this data set (numeral)?

c)    How many elements does this data set contain (numeral)?

2. Indicate which of the following variables are quantitative and which are qualitative.

Note: Spell quantitative and qualitative in lower case letters.

a)    The amount of time a student spent studying for an exam

b)    The amount of rain last year in 30 cities

c)    The arrival status of an airline flight (early, on time, late, canceled) at an airport

d)    A person’s blood type

e)    The amount of gasoline put into a car at a gas station

3. A local gas station collected data from the day’s receipts, recording the gallons of gasoline each customer purchased. The following table lists the frequency distribution of the gallons of gas purchased by all customers on this one day at this gas station.

 Gallons of Gas Number of Customers 4 to less than 8 78 8 to less than 12 49 12 to less than 16 81 16 to less than 20 117 20 to less than 24 13

a)    How many customers were served on this day at this gas station?

b)    Find the class midpoints. Do all of the classes have the same width? If so, what is this width? If not, what are the different class widths?

c)    What percentage of the customers purchased between 4 and 12 gallons? (do not include % sign. Round numerical value to one decimal place)

4. The following data give the one-way commuting times (in minutes) from home to work for a random sample of 50 workers.

 23 17 34 26 18 33 46 42 12 37 44 15 22 19 28 32 18 39 40 48 16 11 9 24 18 26 31 7 30 15 18 22 29 32 30 21 19 14 26 37 25 36 23 39 42 46 29 17 24 31
1. What is the frequency for each class 0–9, 10–19, 20–29, 30–39, and 40–49.
2. Calculate the relative frequency and percentage for each class.
3. What percentage of the workers in this sample commute for 30 minutes or more?

Note: Round relative frequency to two decimal places. Complete the table by calculating the frequency, relative frequency, and percentage.

 Commuting Times Frequency (part a) Relative Frequency (part c) Percentage (%) (part d) 0-9 ? 0.?? ? 10-19 ? 0.?? ? 20-29 ? 0.?? ? 30-39 ? 0.?? ? 40-49 ? 0.?? ?

5. The following data give the number of text messages sent on 40 randomly selected days during 2015 by a high school student.

 32 33 33 34 35 36 37 37 37 37 38 39 40 41 41 42 42 42 43 44 44 45 45 45 47 47 47 47 47 48 48 49 50 50 51 52 53 54 59 61

Each stem has been displayed (left column). Complete this stem-and-leaf display for these data.

Note: Use a space in between each leaf. For example 1 2 3 4 5 6 7 8 9 (do not use this format 123456789).

 3 ?… 4 ?… 5 ?… 6 ?…

6 A) Which of the five measures of center (the mean, the median, the trimmed mean, the weighted mean, and the mode) can be calculated for quantitative data only.

B) Which can be calculated for both quantitative and qualitative data?

7. Prices of cars have a distribution that is skewed to the right with outliers in the right tail. Which of the measures of center is the best to summarize this data set?

8. The following data give the amounts (in dollars) of electric bills for November 2015 for 12 randomly selected households selected from a small town.

 205 265 176 314 243 192 297 357 238 281 342 259

Calculate the (a) mean, (b) median and (c) Is there a mode (Yes or No)?

9. The following data give the prices of seven textbooks randomly selected from a university bookstore.

 \$89 \$170 \$104 \$113 \$56 \$161 \$147

a) Find the mean for these data (input the numerical value without the dollar sign). Calculate the deviations of the data values from the mean.

b) Is the sum of these deviations zero (yes or no)?

c) Calculate the range (do not include unit).

d) Calculate the variance.

e) Calculate the standard deviation (round to one decimal place).

10. The following data give the speeds of 13 cars (in mph) measured by radar, traveling on I-84.

 73 75 69 68 78 69 74 76 72 79 68 77 71

a)    Find the values of the three quartiles and the interquartile range.

b)    Calculate the (approximate) value of the 35th percentile (round to two decimal places).

c)    Compute the percentile rank of 71 (round to two decimal places. Do not include the % symbol).

Note: Round to two decimal places. Do not include unit.

Pages (550 words)
Approximate price: -

Why Choose Us

Quality Papers

At Myhomeworkwriters.com, we always aim at 100% customer satisfaction. As such, we never compromise o the quality of our homework services. Our homework helpers ensure that they craft each paper carefully to match the requirements of the instruction form.

With Myhomeworkwriters.com, every student is guaranteed high-quality, professionally written papers. We ensure that we hire individuals with high academic qualifications who can maintain our quality policy. These writers undergo further training to sharpen their writing skills, making them more competent in writing academic papers.

Affordable Prices

Our company maintains a fair pricing system for all academic writing services to ensure affordability. Our pricing system generates quotations based on the properties of individual papers.

On-Time delivery

My Homework Writers guarantees all students of swift delivery of papers. We understand that time is an essential factor in the academic world. Therefore, we ensure that we deliver the paper on or before the agreed date to give students ample time for reviewing.

100% Originality

Myhomeworkwriters.com maintains a zero-plagiarism policy in all papers. As such, My Homework Writers professional academic writers ensure that they use the students’ instructions to deliver plagiarism-free papers. We are very keen on avoiding any chance of similarities with previous papers.

Our customer support works around the clock to provide students with assistance or guidance at any time of the day. Students can always communicate with us through our live chat system or our email and receive instant responses. Feel free to contact us via the Chat window or support email: support@myhomeworkwriters.com.

Try it now!

## Calculate the price of your order

You will get a personal manager and a discount.
We'll send you the first draft for approval by at
Total price:
\$0.00

How it works?

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

Proceed with the payment

Choose the payment system that suits you most.

Our Samples

Our writers complete papers strictly according to your instructions and needs, no matter what university, college, or high school you study in.

Categories
All samples
Analysis (any type)
Argumentative essays
Dissertation/Dissertation chapter
Analysis (any type)
Political science
4
Argumentative essays
Is euthanasia ethical or not?
Nursing
3
Dissertation/Dissertation chapter
Videoconferencing as a teaching tool
Education
10

Our Homework Writing Services

My Homework Writers holds a reputation for being a platform that provides high-quality homework writing services. All you need to do is provide us with all the necessary requirements of the paper and wait for quality results.

## Essay Writing Services

At My Homework Writers, we have highly qualified academic gurus who will offer great assistance towards completing your essays. Our homework writing service providers are well-versed with all the aspects of developing high-quality and relevant essays.