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1) Personal best finishing times for a particular race in high school track meets are normally distributed with mean 5.27 minutes and standard deviation .42 minutes. If the qualifying time for this event for the regional championship is to be set so that only four percent of all runners qualify,then that qualifying time in minutes is about
2) A random sampling of 1010 us employees was choosen and asked whether they play hooky,that is call in sick at least once a year when they simply need to relax ;202 responded ``yes''. Use this information to set up a 95% confidence interval for the proportion,p,of all u.s employees who play hooky.
3) A random sample of elementary school children in new york state is to be selected to estimate the proportion p who has received a medical examination during the past year. A random sample of 200 elementary school children indicated that 18 of them had received a medical examination in the past year. find points estimate for p and also construct a 95% confidence interval for p.
At the .01 significance level, can we conclude that there is more variation?
Solve linear program graphically
a what percentage of speeds was above 60 milesh or below 20 milesh?b describe in detail the shape center find the
A ball is then selected at random from urn 2. if the ball selected from urn 2 is red, what is the probability that the ball transferred from urn 1 was...(i)red?
Assume it is known that the distribution of purchase amounts by customers entering a popular retail store is approximately normal with mean $25 and standard deviation $8.
Based on this sample, is Moe correct in his assertion? Write up formal commentary of results of your test.
According to the hypothesis that the current year's seed does not meet the 85% germination rate standard at the 5% level of significance. What is the corresponding test statistic value?
question 1 given a binomial random variable with n10 and p .3 use the formula to find the following probabilitiesapx
Labor negotiations estimate that 30 percent of all major contract negotiations result in a strike. During the next year, 12 major contracts must be negotiated. Determine the following probabilities.
What would be a good example of a null and alternative hypotheses for a decision relevant in life? What Type I and Type II errors could occur with your decision-making process?
Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.'
A company's net sales is $ million from 1993-2002, determine the least squares equation and based on this info, what are the estimated sales for 2005?
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