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EU (european union) countries report that 46% of their labor force is female. the united nations wants to determine if the percentage of female workers in the U.S. labor force is the same. Based on a sampel of 500 employment records, representatives form the united states department of labor find that the 95% confidence interval for the proportion of female workers in the U.S. labor force is from .354 to .443. Please interpret this.
A random group of apartments was selected from a city to analize the number of bedrooms they have. Is there evidence to reject the hypothesis that the apartments are equally distributed between 1 bedroom, 2 bedroom, and 3 bedroom apartments, at al..
A confidence interval for the population mean tells us which values of mean are plausible (those inside the interval) and which values are not plausible (those outside the interval) at the chosen level of confidence.
according to an airline a particular flight is on time 95 of the time suppose 120 flights are randomly selected
Calculate the among groups degrees of freedom, determine if the mean ratios for the four neighborhoods are the same?
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
the management of a department store is interested to estimate the difference in the amount of money spent by female
Due to all the unceratinties in government health care legislation, shouldice would like to justify any expansion within a five-year time period. How would I set this problem up?
We forecast that 20% of group 1 and 30% of group 2 will experience outcome. If we recruit the equal number of individuals in each of the groups, how many individuals do we need to study?
1. each supplier is rated on a 10-point scale 10 highestfor four different criteria price quality delivery and
What is the probability that the first order will come on the fourth sales call of the day? Please show work and round to 4 decimal places.
q1. the citys transit commission wants to determine if there is a need for a change in the frequency of service over
if the random variable z is the standard normal score is it true that pz lt 0 could easily be determined without
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