In: Statistics and Probability
Only about 14% of all people can wiggle their ears. Is this percent lower for millionaires? Of the 345 millionaires surveyed, 35 could wiggle their ears. What can be concluded at the αα = 0.10 level of significance?
H0:H0: ? μ p Select an answer < > = ≠ (please enter a decimal)
H1:H1: ? p μ Select an answer ≠ > < = (Please enter a decimal)
Let p denotes the true proportion of all people who can wiggle their ears.
a) For this study, we should use z-test for a population proportion
b- d)
e) Thus, the final conclusion is that -
The data suggest the populaton proportion is significantly lower than 14% at αα = 0.10, so there is statistically significant evidence to conclude that the population proportion of millionaires who can wiggle their ears is lower than 14%.