Give an example of population members that will be omitted in the following situation.

There is a population of all 250 students in your large statistics class. You plan to obtain a simple random sample of 30 students by using the sampling frame of students present next Monday.

students absent on Monday

students who were absent on Friday as they are likely to absent on Monday

Find the technique for gathering data in the study below.

A study of all league football scores attained through touchdowns and field goals was conducted by the National Football League to determine whether field goals account for more scoring events than touchdowns (USA Today).

Your Answer:

sampling

census

experiment

simulation

observational study

Customer:replied 3 years ago.

Question:

The director of the campus-computing center did a study to determine the patterns of student computer usage. He found that 15% of the total student computer hours occurred during the first 5 weeks of the term, 25% during the middle five weeks, and 60% during the last 5 weeks. Would a time-series graph of this data be appropriate? Give a reason for your answer.

Your Answer:

No. A time-series graph is not ideal for data collected over periods of longer than a week.

No. A time-series graph is not ideal for fewer than 10 events or categories of data.

Yes. A time-series graph identifies the frequency of events or categories in increasing order of occurrence.

Yes. A time-series graph would show how student usage of the computer lab varies during the term.

Yes. A time-series graph represents data that make up parts of a whole.

Customer:replied 3 years ago.

I have a question. If I log off now, will you still forward to me the answers for the remaining questions? I am sleepy, but will log on back in the morning. Please reply ASAP.

I am not sure i can answer the first and last question, i didn't understand the first question at all, i can only answer the second question that's why i am going to leave your question open to other experts. I hope that you will get your answers soon.

Hi!, i'm back. I did not get an answer for the last question I sent you last night, so I'm sending it again and I hope you'll be able to answer it. thanks!.

Question:

The director of the campus-computing center did a study to determine the patterns of student computer usage. He found that 15% of the total student computer hours occurred during the first 5 weeks of the term, 25% during the middle five weeks, and 60% during the last 5 weeks. Would a time-series graph of this data be appropriate? Give a reason for your answer.

Your Answer:

No. A time-series graph is not ideal for data collected over periods of longer than a week.

No. A time-series graph is not ideal for fewer than 10 events or categories of data.

Yes. A time-series graph identifies the frequency of events or categories in increasing order of occurrence.

Yes. A time-series graph would show how student usage of the computer lab varies during the term.

Yes. A time-series graph represents data that make up parts of a whole.

Customer:replied 3 years ago.

While I'm waiting for the answer for the other question, here is another one. Thanks!

13. Question:

Consider the data that was obtained from a random sample of 45 credit card accounts. Identify all the averages (mean, median, or mode) that can be used to summarize the outstanding balance on each account.

Your Answer:

mean, median, and mode if it exists

only median if it exists

only mean if it exists

only mean and median if it exists

only mode if it exists

Customer:replied 3 years ago.

Thank you. Here is another question.

Find the sample variance s^{2} for the following sample data. Round your answer to the nearest hundredth.

x:

23

17

12

35

29

84.20

67.36

101.00

88.84

126.25

Customer:replied 3 years ago.

<p>Here is another question.</p><p> </p><table border="0" cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td valign="top"><p>At Center Hospital, there is some concern about the high turnover of nurses. A survey was done to determine how long (in months) nurses had been in their current positions. The responses (in months) of 20 nurses were</p><table border="0" cellspacing="0" cellpadding="0"><tbody><tr><td width="36" valign="top"><p>24</p></td><td width="36" valign="top"><p>2</p></td><td width="36" valign="top"><p>5</p></td><td width="42" valign="top"><p>16</p></td><td width="30" valign="top"><p>26</p></td><td width="36" valign="top"><p>37</p></td><td width="36" valign="top"><p>28</p></td><td width="36" valign="top"><p>48</p></td><td width="30" valign="top"><p>14</p></td><td width="36" valign="top"><p>8</p></td></tr><tr><td width="36" valign="top"><p>6</p></td><td width="36" valign="top"><p>24</p></td><td width="36" valign="top"><p>32</p></td><td width="42" valign="top"><p>27</p></td><td width="30" valign="top"><p>29</p></td><td width="36" valign="top"><p>11</p></td><td width="36" valign="top"><p>22</p></td><td width="36" valign="top"><p>33</p></td><td width="30" valign="top"><p>9</p></td><td width="36" valign="top"><p>37</p></td></tr></tbody></table><p>A box-and-whisker plot of the data is shown below.</p><p>Find the interquartile range.</p></td></tr><tr><td valign="top"><p align="right">Your Answer:</p></td><td valign="top"><table border="0" cellspacing="1" cellpadding="0"><tbody><tr><td><p> </p></td><td><p> </p></td><td><p>22.0</p></td><td><p> </p></td></tr><tr><td><p> </p></td><td><p> </p></td><td><p>20.5</p></td><td><p> </p></td></tr><tr><td><p> </p></td><td><p> </p></td><td><p>40.5</p></td><td><p> </p></td></tr><tr><td><p> </p></td><td><p> </p></td><td><p>39.0</p></td><td><p> </p></td></tr><tr><td><p> </p></td><td><p> </p></td><td><p>25.0</p></td><td><p> </p></td></tr></tbody></table></td></tr></tbody></table>

I do not know if the last question was sent correctly because it is showing some odd information on you end, so I'll send it again. Thanks!

Question:

At Center Hospital, there is some concern about the high turnover of nurses. A survey was done to determine how long (in months) nurses had been in their current positions. The responses (in months) of 20 nurses were

24

2

5

16

26

37

28

48

14

8

6

24

32

27

29

11

22

33

9

37

A box-and-whisker plot of the data is shown below.

Find the interquartile range.

Your Answer:

22.0

20.5

40.5

39.0

25.0

Customer:replied 3 years ago.

WHAT IS THE ANSWER FOR THIS ONE?

15.Question:

Find the sample variance s^{2} for the following sample data. Round your answer to the nearest hundredth.

x:

23

17

12

35

29

Your Answer:

84.20

67.36

101.00

88.84

126.25

Customer:replied 3 years ago.

I thank you. I will have to sign off here because I have to go to work. However, I'll be back tonight if that's o.k.with you. Thanks!!!!

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