Stat 100

[Kevy Baby]

Statistically, it would appear that you have a good shot.

[Ghoulish Delight]

So all you need on 3 assignments is 50%? Doesn't sound hard.

[Kevy Baby]

Originally Posted by Ghoulish Delight

So all you need on 3 assignments is 50%? Doesn't sound hard.

Or 92% on the two assignments and she can skip the exam!

[BarTopDancer]

No, in theory it doesn't. Still starting to freak out. It is a little hard seeing a D as a passing grade when I pull As and Bs on everything else.

I also emailed the teacher to make sure I can pass even if I tank the tests. Some classes, regardless of their point structure have a "fail the tests fail the class" rule.

The assignment for this week is back to more of a Psych stats, variables, experiments. I should do well on it.

[Kevy Baby]

Well, you didn't say anything about GRADES - you just mentioned PASSING.

Silly!

Besides: D stands for Done!

[BarTopDancer]

The D is passing.

My old roommates gf used to say "C your way to your degree". Then again she was a 4.+ PhD student.

So I think I understand...

Researchers asked a sample of 50 1st grade teachers and a sample of 50 12th grade teachers how much of their own money they spent on school supplies in the previous school year. They wanted to see if teachers at one grade level spend more than teachers at the other grade level.

a. What type of study is found—observational or randomized experiment? Explain. – This study is an observational experiment. The subjects are the teachers, and the amount of personal money they spend on school supplies is being observed.
b. What is the experimental unit? – The experimental unit is the teachers
c. What is the response variable? – The response variable is the money spent
d. What is the explanatory variable? – The explanatory variable is the teachers from different grade levels.
e. Do we have to worry about confounding variables in this instance? Why? If so identify a possible confounding variable? Yes, we have to worry about confounding variables in this example. Confounding variables are found in observational experiments. The confounding variable may be the amount of discretionary money each teacher has to spend.
f. Are either of the terms retrospective study or prospective study relevant? Explain. This study would be a retrospective study – the teachers are asked to recall how much of their own money they spent in the previous school year.

[BarTopDancer]

One more

2. A research team compared two methods of measuring treadwear on tires. Eleven tires were each measured for treadwear by two different methods: one method was based on weight while the other method was based on groove wear. For convenience, each tire was measured first by weight method and then second by the groove wear.

a. The two samples are which of the following: two independent or two dependent (matched pairs)? Explain. The two samples used are independent samples. The tires were measured for weight and then by groove. The weight of the tire may be affected by the amount of groove wear on the tire.
b. What type of study is found—observational or randomized experiment? Explain. This study is a randomized experiment. The measurements are randomly assigned to the tire.
c. What is the experimental unit? The experimental unit is the tire.
d. What is the response variable? The response variable is the treadwear.
e. What is the explanatory variable? The explanatory variable is the measurements (weight or groove wear).

[BarTopDancer]

Teacher says I get the grade that equates to the point I earn. He also said the last test is much easier than the previous test. That gives me hope, and a C *is* obtainable.

[BarTopDancer]

Would anyone [who understands stats] be willing to check my assignment? It's not due until tomorrow night. PM me your email if you are.

Thanks

[Kevy Baby]

Originally Posted by BarTopDancer

Would anyone [who understands stats] be willing to check my ass

!