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A life insurance salesperson claims the average worker in Hobart has no more than $25 000 of personal life insurance. To test this claim, you randomly sample 100 workers in Hobart. You find that this sample of workers averages $26 650 of personal life insurance. The population standard deviation is $12 000. Does the salesperson's claim appear valid? Use a level of significance of 5%.
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
suppose that 88 of college men and 82 of college women were employed last summer. a sample survey interviews
In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:
What does the * represent in a boxplot? How many * are there for the variable Book Cost? What are the outlier values? What is the 5-number summary for Book Cost?
A random sample of 12 batteries yields X-bar = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
Find that a random sample of 14 similar cars has a mean of price of $19,850 with a standard deviation of $1084. Is there enough evidence to reject the salesman's claim at "alpha" = 0.05?
Determine the coefficient of determination. Assuming a direct relationship between the variables, what is the coefficient of correlation?
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
The following data lists the number of hours spent working during the previous week. From these data round the relative frequencies to three decimal places.
The effectiveness of short term relaxation and cognitive-behavioral
The average for the test is a 1700 and the population's standard deviation is 50. what percentile rank of students is Logan in based on her SAT score.
Test of claim for the statement made for a given paired sample:
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