3. A political campaign manager wants to test the effectiveness of a new advertisement featuring Candidate X The campaign manager takes a random sample of 300 voters before the ad goes on air and another random
sample of 250 voters afterwards. 158 of the 300 voters in the "before" sample say they support Candidate X
and 140 voters in the “after” sample say they support Candidate X. If P,= the proportion of all voters who
support Candidate X after the ad is aired and Pe=the proportion of all voters who support Candidate X
before the ad is aired, which of the following is the correct standardized test statistic for H: P.-P. = 0?
0.56 -0.527
0.56 -0.527
(b)
10.56(0.44 0.527(0.473)
0.542(0.458) 0.542(0.458)
250
300
250
300
0.56 -0.527
0.56 -0.527
(c) == -
(d)
0.542(0.458)
0.56(0.44) 10.527(0.473)
550
250
300
0.56 -0.527
(e) ==
0.56 0.527
250 300

Option C -

Step-by-step explanation:

Given : The Jones family plans a trip to the amusement park a purchase a family package for $128.00. They also want to buy lunch and souvenir cups. The chicken platter costs $8.50 each and the burger platter costs $9.50 each. The souvenir cups each cost $10.00

To find : Which of the following algebraic expressions can be used to describe the amount of money the Jones family will spend, before sales tax, based on the number of each meal and souvenir cups purchased?

Solution :

Let x represent the number of chicken platters.

Let y represents the number of burger platters.

Let z represent the number of souvenir cups.

A family package cost is $128.00.

The chicken platter costs $8.50 each

The cost of x chicken platter =

The burger platter costs $9.50 each.

The cost of y burger platter =

The souvenir cups each cost $10.00

The cost of z souvenir cups  =

Therefore, Total they spend is

Hence, Option C is correct.