hi i need someone to do my quiz paper sheet statstic

Anonymous
timer Asked: Jan 25th, 2019
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Question Description

the homework should be hand written and its only 7 questions and should be full explanations for full credit

American River College Name:……………………………… Stat 300 Quiz #1 Remarks: 1. It is necessary to show your work. Unsupported answer might not receive credit at all. 2.There is enough room on the paper to answer the questions. However, if you find out that the space left is not enough for your answer, you can continue working on the back of the page after indicating it in the front of the page. Questions that you put in the back of the page should be numbered appropriately. 3. Start with questions that seem easy for you. 1. Identify the population and the sample. Be as precise as possible. A survey of 1600 business people found that 76% plan on using Microsoft Windows7 operating system at their businesses Sample: (2pts) Population: (2pts) 2. Does the number 76% in question 1. represent a parameter or a statistic. Justify your answer. (2pts) 3. Make an inference based on the results of the survey in question #1. (2pts) 4. Determine which data are qualitative and which data are quantitative. Explain your reasoning. a. The yearly salaries of the employees at a school district. (2pts) b. The employee numbers of the employees at an accounting firm. (2pts) c. The area codes of a sample of 350 residents of nursing homes. (2pts) d. The ages of a sample of 350 residents of nursing home. (2pts) e. The answers to a survey of 5000 people about how likely is it that the US will enter a 1930s-like depression. The answers are: Very likely, somewhat likely, not very likely, not at all likely. (2pts) 5. f. The IQ index of the students in a statistics class. (2pts) What are the levels of measurement of data in question 4? Justify a. Yearly salaries: (2pts) b. Employee numbers: (2pts) c. Area codes: (2pts) d. The ages: (2pts) e. Survey answers: (2pts) f. IQ index: (2pts) 6. Determine the sampling technique that was used in each of the situation. Choose among convenience, systematic, stratified and cluster sampling. Explain your reasoning. a. A journalist goes to a beach to ask people how they feel about water pollution. (2pts) b. A pregnancy study in Cebu, Philippines, randomly selected 33 communities from the Cebu metropolitan area, then interviewed all available pregnant women in these communities. (2pts) c. Twenty five students are randomly selected from each grade level at a high school and surveyed about their study habits. (2pts) d. For quality assurance, a starting point between 1 and 5 is randomly selected then every fifth engine part is selected from an assembly line and tested for durability. (2pts) e. A large company has 2000 male employees and 2000 female employees. 50 female employees and 50 male employees are randomly selected and asked about their retirement goals. (2pts) f. A statistics class has 45 students. Ten of them are randomly selected and asked about the degree of difficulty of their quiz #1. (2pts) 7. Consider the samples gotten in question #6. Determine if each is a random sample or not. Is it a simple random sample? Justify your answer in each case. a. Water pollution study: Random sample: (2pts) Simple random sample: b. Pregnancy study Random sample: (2pts) Simple random sample: c. High school study habits: Random sample: (2pts) Simple random sample: d. Quality assurance: Random sample: (2pts) Simple random sample: e. Retirement goals: Random sample: (2pts) Simple random sample: f. Degree of difficulty: Random sample: Simple random sample: (2pts)

Tutor Answer

PhileJonesTutor
School: Rice University

Kindly check the answer in the attached file below.

Running head: STATISTICS QUESTIONS

Statistics Questions
Student’s Name
Institution

1

STATISTICS QUESTIONS

2

Statistics questions
1. Identify the population and the sample. Be as precise as possible. A survey of 1600
business people found that 76% plan on using Microsoft Windows7 operating system at
their businesses
Sample:
1600 is the sample size in the study. It represents the number of people who responded in
the study and thus it is the population size.
Population:
There is no population size given here.

2. Does the number 76% in question 1. represent a parameter or a statistic. Justify your
answer.
1600 is the sample and 76% of the said sample plan on using windows7. Therefore, 76%
is a representation of the sample and thus it is a statistic. A parameter is usually a
representation of the population.

3. Make an inference based on the results of the survey in question #1.
0.76 is a relatively high number reflecting those who wish to change to windows7.
However, the changes in technology and the need for businesses to keep up with the
change explains the reason for such a high number. Additionally, it is possible that a
change in the sample size may have minimal changes in the percentage due to errors in
calculation and the rounding off of the numbers.

STATISTICS QUESTIONS

3

4. Determine which data are qualitative and which data are quantitative. Explain your
reasoning. a. a. The yearly salaries of the employees at a school district.
Quantitative- the salaries are numerals and it is easy to attach a value to the same.
b. The employee numbers of the employees at an accounting firm.
Quantitative- the number of employees are in numerals and thus the data is quantitative.
c. The area codes of a sample of 350 residents of nursing homes.
Quantitative- the sample has a number and the codes are also numbers making it
quantitative.
d. The ages of a sample of 350 residents of nursing home.
Quantitative- the age is a number and thus it has to be quantitative.
e. The answers to a survey of 5000 people about how likely is it that the US will enter a
1930s-like depression. The answers are: Very likely, somewhat likely, not very likely, not
at all likely.
Qualitative- there is the absence of numerical representation. It illustrates the feeling of
the respondents and thus it is qualitative.
f. The IQ index of the students in a statistics class.
Qualitative- it is a representation of something that is hard to attach a value to. Although
it is represented as a number, it is dependent on the quality of answers and so it is
qualitative.

5. What are the levels of measurement of data in question 4? Justi...

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Review

Anonymous
Good stuff. Would use again.

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