Answer:
A
The correct option is B
B

C

D
The correct option is D
Step-by-step explanation:
From the question we are told that
The sample size is 
The number that developed nausea is X = 50
The population proportion is p = 0.20
The null hypothesis is 
The alternative hypothesis is 
Generally the sample proportion is mathematically represented as


Generally the test statistics is mathematically represented as
=> 
=> 
=> 
The p-value obtained from the z-table is

Given that the
then we fail to reject the null hypothesis
3.2 . I don't really know how to explain this, but I need to write at least 20 characters to give you my answer.
Answer:
25 %
Step-by-step explanation:
Percentage is given by :

Original cost of sweater is $32 and sale cost is $24. So,

Hence, 25 % is the markdown on the sweater.
Answer:
23 or 23.00
Step-by-step explanation:
Im very very intelligent