Assignment Requirements

Please answer the questions on the attached document.

1)      Determine whether the evaluated group is a population or a sample

a)      Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer.

b)      An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants have serious health code violations. Is this a population or a sample; explain your answer.

2)      Determine whether the given value is a statistic or a parameter.

a)      A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer.

b)      After taking the first exam, 15 of the students dropped the class. Is this a statistic or a parameter; explain your answer.

3)      Identify the type of sampling used.

a)      A tax auditor selects every 1000^th income tax return that is received. What type of sample is this and why?

b)      The name of each contestant is written on a separate card, and the cards are placed in a bag with three names being picked from the bag. What type of sample is this and why?

4)      Is the study experimental or observation and why?

a)      A political pollster reports that his candidate has a 10% lead in the polls with 10% undecided.

5)      Select the study that is most appropriate and EXPLAIN WHY it is most appropriate for the study.

a)      Is the aspirin produced by a particular pharmaceutical company better than that of a competitor at relieving headaches? Which of the following would best be used to study this: 1) a case-controlled observation; 2) an observation; 3) a double-blind experimental procedure; and 4) and experimental procedure.

From Chapter One

Please answer this question in APA

Focus on Public Health—On page 44 of the text, it discusses the Harvard Nurses’ Health Study, which is a very well-known study that has been conducted for a number of years. Dr Speizer sent out questionnaires to 370,000 registered nurses.

Explain why the Harvard Nurse’ Health Study is an observational Study. Critics sometimes say that the results would be more valid if obtained by experiments rather than observations. Discuss whether it would be possible to gather similar data by carrying out the experiments in a practical and ethical way.

1)      Identify the following variables as either qualitative or quantitative and EXPLAIN your answers.

1. The number of people on a jury.
2. The color of your house

2)      Identify the number as either continuous or discrete and EXPLAIN your answers.

1. The average height of all freshmen entering college in a certain year is 68.4 inches.
2. The number of limbs on a 2-year-old oak tree is 21.

3)      Determine which of the four levels of measurement is most appropriate and explain your answer.

1. Temperatures in degrees Fahrenheit of the ocean at various depths.
2. The rank of individuals in the military
3. The number of people with blue, brown and red hair in a classroom

4)      Determine the following (show your work):

1. The speed of a new microprocessor is 800MHZ, but a new test of its speed gives a measurement of 820MHZ. What is the absolute error? What is the relative error?
2. Convert 1/16 to a percent
3. Convert 0.45 to a percent
4. Humanities majors spend an average of $115 per course on books. Mathematics majors spend an average of $70 per course on books.

What is the percent difference between the two amounts relative to the amount for mathematics majors (round to the nearest percent)?

1. Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the “Statistics Text Index” number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value?

From Chapter Two

Please answer this question in APA

Focus on Economics:

Find examples in your own spending or the spending of friends and family of substitution effects and the purchase of products that were unavailable or lower quality a few years ago. Overall, do you think these examples support the claim that CPI overstates the effects of inflation? Defend your opinion.

MATH 135 Term Project.

The point of this project is to make an educated guess (inference) about a specific population, using statistics and statistical methods. Since this is the election year we will use a topic that is relevant to the current event. As you complete this project I hope you will see how the concept we learn can be applied to real life situation.

STEPS
1. Population and how you phrase your question:
Pick a presidential candidate that you’re interested to study and formulate a question for your survey. Your questions can be something like:
– Who do you vote for?
– Did you vote for Clinton or Trump?

Note that you need to pick one candidate as your topic, for example if your topic is Clinton, then every vote for her is a yes, and everything else (Trump or a third party) count as a no.

2. Null and Alternative Hypothesis.

Pick a % value for your null hypothesis that you think the candidate will receive. For example you believe Trump will get 42% of the vote. Briefly explain why you decide to choose that alternative hypothesis. Alternately you can wait after the result is announced and use the actual number.

3. Sampling
I will not accept convenience sampling, like Facebook. Collect the desired data. Describe when, where, and how the data was obtained. Try to collect from a wide variety of population group to avoid bias in your sample. (i.e Students, White collar, Blue collar, Young Adult, Elder …etc…). Sample size at least 50

4. Descriptive Statistics
Calculate p hat(sample %), confirm np≥5 n(1-p)>5, give the variance and standard deviation of p hat.

5. Graph
Bar graph. 1st two bars: % in category of focus from null hypothesis, and % in other. 2nd two bars: % in category of focus from sample, and % in other. The first pair(y/n) is from the null hypothesis, the second pair(y/n) is from the sample.

6. Confidence Intervals
Create a 95% confidence interval of p.

7. Hypothesis Test
Do a test at the 5% level of significance. Find your critical value. Compute your test statistic. Compute your p-value. Make a decision to reject the null hypothesis or not.

8. Conclusion
Finally, tell us, the audience what this rejection or non-rejection means for your population, in understandable terms. If you like, you can state any interesting facts/ideas/thoughts about your project. The project must be turned in by the last day of class, no exception. You can turn in a hand written project or typed, but it must be clean, clear and concise to receive full grade.

Extra credit:
15%: if all items on your project are typed (you will need to figure out how to do the chart on the computer i.e Excel). You can earn up to 10% extra on this project depend on well you present your project (clear chart, professional layout …etc…)