Examlex
As children grow they develop what is known as "representational insight," a connection between an object and a symbol for that object. A random sample of youngsters 24-months old were shown a video of someone putting a toy under 1 of 4 randomly placed boxes in a room familiar to the child. They were then taken to the room, and asked to "find the toy." The investigators reasoned that a child with representational insight should pick the correct box on the first try. If the children were to overturn the boxes randomly, they would find the toy on the first turn 25% of the time. Thirty children out of 57 subjects found the toy by turning over the correct box on the first try.
Does this sample provide sufficient evidence that the proportion of 24-month old children who choose the correct box on the first try is greater than 0.25? Use a significance level of α = 0.05 to test the appropriate hypothesis.
Openness To Experience
A personality trait involving the willingness to try new things, engage in abstract thinking, and appreciate art and beauty.
Politically Liberal
Holding or expressing political views that favor progress, reform, and the protection of civil liberties.
Conscientiousness
An attribute showcasing an individual's knack for structural orderliness, dependability, and unwavering commitment to responsibilities.
Antisocial Behaviors
Actions that violate social norms and are harmful to society, often resulting in negative consequences for the individual and those around them.
Q5: Astronomers are interested in the recessional velocity
Q9: Reading comprehension is arguably the single most
Q16: Consider sampling from a skewed population. As
Q23: Pearson's correlation coefficient, r, does not depend
Q27: The two paragraphs below discuss aspects of
Q28: In performing a vertical analysis for a
Q35: In a random sample of large cities
Q38: The vertical percentage formula divides the analysis
Q60: At the end of the quarter, Company
Q172: Ratio analysis expresses the relationship among selected