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A study found that the average time it took a person to find a new job was 3.5 months. If a sample of 30 job seekers was surveyed, find the 90% confidence interval of the mean. Assume the standard deviation of the sample is 0.5 month.
find an equation of the parabola that has the indicated vertex and whose graph passes through the given point. vertex
A soft drink bottling machine is set to dispense soft drink into containers labeled 16 ounces. While the actual quantities vary they are normally distributed with a mean of 16.1 ounces and a standard deviation of 0.015 ounces.
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
write a hypothesis for the following statementsa. the health department is charged with finding out if the rate
A medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are measured), how many degrees of freedom should the researcher use in her ..
specimens of blood from 10 different animals were analyzed for blood count say y in units of 100 and packed cell volume
In a sample of 50 members of a local health club you find that 12 of these members meet weekly with a physical fitness trainer and that the average body mass index (BMI) of these 12 members is less than the average BMI of the other 38 club members..
american culture and drug abuseassume you are a member of the family research council and have become increasingly
you interview 100 people about who their favorite rock band is. of those 100 80 replied that their favorite band is
The accounting department at Weston reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours... Determine the z values for 29 and 34 hrs. What percent of garages take between 32 and 34 hrs to erect.
Find the area under the normal distribution curve to the right of z = -1.03.
Use a decision tree to describe the possible strategies and the consequences (or payoffs) of each. Show your decision tree.
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