The mayor of Lawrenceville indicated in a news interview that the percentage of students at GGC studying business is at least 30%. For your marketing project, you intend to test this claim. The correct setup of a hypothesis test for this situation is: a) H0: p < .30 Ha: p ≥ .30

b) H0: p ≤ .30 Ha: p > .30

c) H0: p ≥ .30 Ha: p < .30

d) H0: p > .30 Ha: p ≤ .30

c) H0: p ≥ .30 Ha: p < .30

Step-by-step explanation:

The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean.

For the case above; let p represent the proportion of students at GGC studying business.

The Null hypothesis H0 is that the proportion of students at GGC studying business is at least 0.30 (30/100 = 0.30). It is greater than or equal to 0.30.

H0: p ≥ 0.30

The alternative hypothesis Ha is that the proportion of

students at GGC studying business is less than 0.30.

Ha: p < 0.30

answer is 144

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional