As a researcher, you are interested in studying the cholesterol levels using the Framingham Heart data (see attached excel file "FramHeartStudy_wobese_data"). The research question of interest is to see if the cholesterol level is associated to the smoking status. This question can also be asked more specifically, i. e. if the total cholesterol levels are the same between current smokers and current non- smokers. Statistically, the question is converted into a hypothesis (HT), that is, if the population means of total cholesterol level are the same between current smokers and non-smokers. 1. What is the degree of freedom for a two-sample t test? 2. What is the T score for your hypothesis testing? (hint, use sample means, pooled standard deviation and sample size) 3. What is the p-value of the hypothesis testing using a two sample t test (or called two independent t test)? 4. What is the conclusion to your HT? (hint, use the p-value to make the conclusion) 5. Now, how will you answer your research question using the p-value or the conclusion from the HT? 6. Supposing the total cholesterol level is not normally distributed, what is the alternative statistical test you would consider to answer this research question? 7. What is the p-value from the alternative test? 8. Do you still have the same conclusion from the alternative test as you had from the previous two sample t test?

this story was prepared by jim

mccullaugh in los angeles and

al stewart in new york.

new york the colossal success of "top gun" appears to have dramatically altered madison avenue's

perception of corporate sponsorship

of home video projects.

the paramount home video re- lease, featuring a 60- second diet

pepsi spot, was by no means the

first prerecorded video to carry an advertiser's plug, but it was the

first major theatrical release to do so. in the aftermath of the title's

success, paramount is widely ex- pected to ink a similar deal for

"crocodile dundee" or "star trek

iv" or both.

corporate america's new attraccds push british

recording sales

to 19% gain

london fueled by the compact

disk boom, the value of u.k. manu- facturer shipments of recordings

rose 19% in the 12 -month period ended march 1987, according to the

british phonographic industry.

total value of u.k. shipments for

the period was $755 million for all

configurations. (all value figures

are based on an exchange rate of

$1.68 to the pound sterling.)

cd sales totaled 10.7 million units

worth $121.3 million- compared

with 3.7 million units worth $39.5

million in the prior 12 months -and

accounted for two -thirds of the

overall gain in trade value. at present growth rates, says the bpi, cd

sales for calendar 1987 will reach 20

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step-by-step explanation:

b. astronomers

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.