Which of the following represents a null hypothesis? Group of answer choices Class A high school basketball teams who employ a sports psychologist will have a higher proportion ofwins over the course of the season than comparable teams who do not employ a sports psychologist. There will be no difference in rate of skill improvement between college gymnasts who practice meditation and those who do not. Does incorporating relaxation exercises into the daily practice routine of college vocal majors enhance their performance confidence? None of the above

Step-by-step explanation:

Given are some sentences and we have to select those which represents a null hypothesis.

In a statistical test, the null hypothesis is  that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.

Thus we can infer that normally null hypothesis would be for no differences while alternate can be either greater than or less than or equal to

Class A high school basketball teams who employ a sports psychologist will have a higher proportion ofwins over the course of the season than comparable teams who do not employ a sports psychologist.

-- Not a null hypothesis only alternate

There will be no difference in rate of skill improvement between college gymnasts who practice meditation and those who do not.

-- Yes, null hypothesis

Does incorporating relaxation exercises into the daily practice routine of college vocal majors enhance their performance confidence?

-- It is a question and not a hypothesis.  Neither null nor alternate

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.