Answer:
Hello!! The answer is 3
Step-by-step explanation:
15 - 4(3)
15 - 12
3
Answer:
Sale 2/3
Step-by-step explanation:
Answer:
a
The null hypothesis is 
The alternative hypothesis is 
b
The sample proportion is 
Step-by-step explanation:
From the question we are told that
The sample size is n = 546
The number of people that use a laptop overnight is 
The population proportion is 
Generally
The null hypothesis is 
The alternative hypothesis is 
Gnerally the sample proportion is mathematically represented as

=> 
=> 
The answer is 5 units. the top is 10, and x is half of that