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1. A random sample of 25 precocious readers is drawn and their family backgrounds carefully studied. In 40% of the cases, the child's father is at least 15 years older than the mother. Place a 90% confidence interval on the proportion of such age disparities between the parents of precocious readers.
2. A random sample of 100 persons suffering from mental depression reveals that 75 of them cannot properly evaluate their job skills.
a. Give the maximum-likelihood estimate of the binomial parameter.
b. Set up a 95% confidence interval for this parameter.
Researchers testing a new medication find that 7% of users have side effects. To how many pa- tients would a doctor expect to prescribe the medication before finding the first one who has side effects?
1. Electrical resistance is the opposition which is offered by electrical conductors to the flow of current. The unit of resistance is the ohm.
Calculate the mean Days in Inventory for the cars in the sample.
The monthly income of residents of Dayton is normally distributed with a mean of $3000 and a standard deviation of $500.
A researcher fails to find a significant different in mean blood pressure in 36 matched pairs. The standard deviation of the difference was 5 mmHg.
q1.heights of men on a baseball team have a bell-shaped distribution with a mean of 177cm and a standard deviation of
Identify at least 2 variables for which you would utilize a repeated-measures ANOVA in your analysis and describe the variables and scale of measurement. Identify whether each factor is fixed or repeating.
Simple! (Takes about 25 minutes to answer.) In a study evaluating "Why minority males graduate American high-schools at lower rates than their counterparts", the following is needed:
an important application of regression analysis in accounting is in the estimation of cost. by collecting data on
Draw a picture of each of the following distributions. Shade the area above the value given, and label the proportion of the distribution that falls in that region, as in given Figure.
the time between arrivals of large comets on earth is exponentially distributed with a mean of one year.a. what is the
Construct an 88% confidence interval for the average amount of unburned hydrocarbons for the entire population of this brand of car buretor.
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