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A travel association claims that the mean daily meal cost for two adults traveling together on vacation is ?$100. A random sample of 20 such groups of adults has a mean daily meal cost of ?$105 and a standard deviation of ?$6.00. Is there enough evidence to reject the claim at alpha=0.1??
Calculate the standardized test statistic. t=____
Use technology to calculate the P-valve. P=____
Develop a scatter diagram for the following sample data. How would you describe the relationship between the values?
an article reported that in a study of a particular wafer inspection process 356 dies were examined by an inspection
bob sells thingamabobs. his yearly salary is 27000 plus a commission of 10 of his sales. his yearly sales are normally
1. suppose 60 of kids who visit a doctor have a fever and 20 of kids with a fever have sore throats. whats the
A poll of 1125 adults in a certain country found that 55% identified themselves as the followers of some religion. The margin of error was 5 percentage points with 99% confidence.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Assume this is an average from a population with standard deviation of $1.5. If a random sample of 30 months is selected, what is the probability that its average will exceed $4.00?
Is the distribution of number of hours students watch television weekly symmetric? If not, what shape would you expect this distribution to have?
The overhead reach distances of adult females are normally distributed with a mean of 202.5 cm and a standard deviation of 8.6cm.a. Find the probability that an individual distance is greater than 212.50cm.
Why do you think they only planned to include "randomized controlled trials" (that is, randomized experiments) and not observational studies?
according to a recent survey high school girls average 100 text messages daily the boston globe april 21 2010. assume
flaws occur in mylar material according to a poisson distribution with a mean of 0.05 flaw per square yard. round your
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