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A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years. A random sample of 600 young adults not enrolled in college was selected and 150 of them had at least one motor vehicle accident in the previous two years. At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. If you determine not to reject the null hypothesis what is your conclusion?
The number of girls who attend a summer basketball camp has been recorded for the seven years the camp has been offered.
Describe whether the data appear to be approximately normally distrusted by .. a. Comparing data characteristics to theoretical properties.
Write all the possible samples of size 2 and calculate the average or median of each one.
How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses
What is critical z-value which corresponds to confidence level of 88%.
Compute the mean, variance and standard deviation for the grouped data. Based on the previous answer, how much could the realtor expect to make if he sells 3 houses?
To test whether the population mean is less than a specified value.
Test at 5% and 1% whether the molder is operating satisfactorily.
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Choose a group of 4 adults at random. What is the probability that none of them enjoy drinking beer?
What is the standard error of the difference between the means?
The NY Dept of Motor Vehicles (DMV) designs its license plates with space for 7 letters or numerals. In the most recent iteration, the DMV uses three letters followed by 4 numbers.
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