What we are looking for is the confidence interval.
Given:
Sample it is denoted by n = 10
Mean = 80
Standard deviation = 12
Confidence Interval = 99%
Now compute for the margin of error, the formula is Za/2 * σ/√(n)
A 99% level of confidence has a critical value of zα/2 = 2.58.
The standard error is σ/√(n) = 3.162
Multiply 2.58 by 3.162 = 9.8 is the margin of error.
The formula for confidence interval is x̅ ± Za/2 * σ/√(n)
= 80 ± 9.8
= 70.2 < x< 89.8
Question
Which type of research study would best be used to determine how aggressive children are while playing at a schoolyard during recess?
a. confounding
b. case study
c. introspection
d. naturalistic observation
e. experiment
Answer:
D. Naturalistic observation
Explanation:
Naturalistic research as opposed to analog research is reasearch whereby a subject is observed while subject is in his natural habitat and free of manipulation. This is illustrated in the example above where aggressive children could be observed while in their school playing ground. This would leave the subject oblivious of the observer and therefore subject would be his natural self.
Answer:
Low; unselective.
Explanation:
Signal Detection Theory is the theory that was developed during world war 2 research. The purpose of this theory is to measure the sensory system or sensation. It also helps in detecting the stimulation amount in our body. Threshold is the tool that psychologists use in this theory to determine this amount.
The given statement is an example of signal detection theory.
According to this theory, the words that correctly fills the space are low threshold and unselective to reach out potential dates.
Answer: A. demand B. cost
Explanation:
In 2000, due to technological advancement and industrialization the demand for internet increased and the cost decreased thus it allowed the individuals to perform browsing, helped students to gain knowledge from the web services, helped in communication and also helped to run private businesses which established a new era of economic growth.
