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
Answer: Construct validity
Explanation:
Construct validity is the degree to which a test is done to measure what it claims. Construct validity defines how well the test or experiment actually measures its claims and whether the operational definition of the variable reflect the true theoretical meaning of the concept being illustrated.
The psychologist develops a questionnaire that is designed to study the variable of self-esteem and then conducts different studies to investigate the differences between people who had low scores on sled esteem and the people who had high score on self esteem. The reason for this was to get an accurate method of measuring self esteem. This means the psychologist wants to establish construct validity.
Explanation:
The majority of private ownership and limited government ownership of businesses in the economies is a characteristic of mixed economy.
Mixed economies typically maintain private ownership and control of most of the means of production, but often under government regulation.Most of the democratic economies of the world follow this model of economy as it is beneficial for the democracy. The United States, France and Germany all were once fully capitalist have now turned towards mixed economy.
Answer: The desire satisfaction theory states that the level of individuals happiness has to do with the satisfaction of their desires.
Explanation:
The desire satisfaction theory states that individuals level of well-being is directly proportional to the total level of desires satisfied in their life. According to the theory, one's life goes well once the person achieves his or her desires. Something is good for a person only if it satisfies the person's desires.
A desire might become defective because it is pointless not because the desire was not satisfied. Sometimes we have irrational or ill informed desires. An example is an individual who desires to draw a tattoo on his body but later becomes disappointed after drawing the tattoo. According to desire satisfaction theorists, this can be as a result of information failure. Also, theorists say that an individual might be worse off satisfying some desires not as a result of lower satisfaction gotten from the fulfillment of the desire but because the satisfaction is bad in itself. Lastly, theorists say a person may be disappointed because the desire is pointless and hence lacks excellence e.g. hitting a football against the wall or counting blade grasses.
