Answer:
A. Matched Samples
Explanation:
Matched samples is a situation whereby participants are paired, sharing every other characteristics except the one under investigation. The idea behind this is to have more control over unwanted variables. In this case, the study is measuring two production methods and in order to control the unwanted variable and leave only the characteristic or variable under investigation which is the production method, the two method is carried out by the same workers each.
Answer:
Sergey likes to play soccer in his free time = Hobbies
Scott's parents moved from the U. S. to Australia = Background
Bihn wants to make enough money to send his children to school = goal
Yolanda us outgoing and able to make friends quickly = Ability
Cheyenne is currently working as a junior dance teacher in a big studio, to learn what she would need to know when she opens her own someday = experience
Melanie cares about fitness and the outdoors so she often participates in active outdoor activities like biking and mountain climbing = Lifestyle
Amandos favourite subject in school is world history = interest
Answer:
a) 406200000
b) 7500000 and 5.36%
c) 0.7
Explanation:
please find the attached file
Answer:
± 4.05
Explanation:
Data provided in the question:
Random sample size = 15
Standard deviation = 8
Confidence level = 95%
Now,
Margin of error is given as:
Margin of error = ± [ ( z × s ) ÷ √n ]
Here,
From standard z table for 95% confidence level z = 1.96
Margin of error = ± [ ( 1.96 × 8 ) ÷ √15 ]
or
Margin of error = ± [ 15.68 ÷ 3.873 ]
or
Margin of error = ± 4.05
