Hi. May I please get help with the following homework questions? Thank you.

Question 1: A regression model has the form

Y = 6X - 11

As X increases by 1 unit, Y is expected to

1. increase by 11 units
2. decrease by 11 units
3. increase by 6 units
4. decrease by 6 units

Question 2: The multiple coefficient of determination is

1. MSR/MST
2. MSR/MSE
3. SSR/SST
4. SSE/SSR

Question 3: A continuous random variable is uniformly distributed between a and b. The probability density function between a and b is

1. zero
2. (a - b)
3. (b - a)
4. 1/(b - a)

Question 4: The center of a normal curve is

1. always equal to zero
2. is the mean of the distribution
3. cannot be negative
4. is the standard deviation

Question 5: Given that Z is a standard normal random variable, what is the value of Z if the area to the left of Z is 0.0559?

1. 0.4441
2. 1.59
3. 0.0000
4. 1.50

Question 6: When the level of confidence decreases, the margin of error

1. stays the same
2. becomes smaller
3. becomes larger
4. becomes smaller or larger, depending on the sample size