Cashback Offer from 16th to 19th October 2021. Get Flat 10% Cashback credited to your account for a minimum transaction of \$80. Post Your Question Today!

Question DetailsNormal
\$ 18.00

# QNT 275 Week 1 Practice Set | Complete Solution

Question posted by  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
a.    What is the frequency for each class 0–9, 10–19, 20–29, 30–39, and 40–49.
b.    Calculate the relative frequency and percentage for each class.
c.    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.

\$ 18.00

## [Solved] QNT 275 Week 1 Practice Set | Complete Solution

• This solution is not purchased yet.
• Submitted On 03 May, 2018 03:44:58  a) What is the variable for this data set (use words)? Number of Deaths b) How many observations are in this data set (numeral)? 8 c) Ho...
Buy now to view the complete solution Other Similar Questions Quali...

### QNT 275 Week 4 Quiz Grade: 100% Score: 10/10

QNT 275 Week 4 Quiz Grade: 100% Score: 10/10 **The questions and their respective choices will not be in this exact order** Serial correlation is typically observed in: ● Sparse data. ● Outliers. ... Quali...

### QNT 275 Week 2 Quiz Grade: 100% Score: 9/9

QNT 275 Week 2 Quiz Grade: 100% Score: 9/9 **The questions and their respective choices will not be in this exact order** The accompanying chart shows the numbers of books written by each author in a... Quali...

### QNT 275 WEEK 3 QUIZ Grade: 100% Score: 10/10

QNT 275 WEEK 3 QUIZ Grade: 100% Score: 10/10 **The questions and their respective choices will not be in this exact order** Which of the following can be represented by a discrete random variable? ● The numbe... Quali...

### QNT 275 Week 4 Connect Knowledge Questions With Answers.

QNT 275 Week 4 Connect Knowledge Questions With Answers. 1. The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic. True False Answ... Assig...

### QNT 275 Week 4 Final Business Decision Making Project Part 3(6 pages word paper)

#### The benefits of buying study notes from CourseMerit ##### Assurance Of Timely Delivery
We value your patience, and to ensure you always receive your homework help within the promised time, our dedicated team of tutors begins their work as soon as the request arrives. ##### Best Price In The Market
All the services that are available on our page cost only a nominal amount of money. In fact, the prices are lower than the industry standards. You can always expect value for money from us.  