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The Jones family had a total income of $73,000 and paid 22% of their income to taxes. The Brown family had a total income of $42,000 and paid 26% of their income to taxes. Given this information, answer each of the following questions:
Which family paid the most relative taxes?
What is the difference in percent taxes paid by the two families?
Which family paid the most absolute dollars in taxes?
What is the absolute difference in dollars paid by the two families?
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
A. At first glance, does there seem to be a pattern to the relationship between the insurance premiums for males and females? Describe it.
The mean driving time is 35 minutes with a standard deviation is 10 minutes. What is the 98 percent confidence interval for the population mean?
Utilizing jacobian method finding the probability density function. Utilizing either the CDF method or Jacobian method illustrate the probability density function of Y is given.
SOB's systolic blood pressure is a random variable with a mean of 145 mmHG and a standard deviation of 20mmHG. If the SOB's blood pressure is taken at a randomly chosen moment
multiple choice question based on multiple regression.in a regression model involving 30 observations the following
The time (in hours) a customer spends in a particular store is an exponential random variable T, with E[T] = ½
Assume that the process is in control and that the population of all jar fills is normally distributed. (Round the z-values to 2 decimal places and final answer to 4 decimal places. Negative amounts should be indicated by a minus sign.)
After testing whether social class and welfare spending were related, you derive a chi-square (obtained) of 17.64, with 6 degrees of freedom. If alpha is set at 0.01, what is your conclusion and interpretation?
The mean weight of 500 students is 151 lbs and the standard deviation is 15 lbs. Assuming the weights are normally distributed, find out how many students weigh between 120 and 155 lbs.
If the student IQ score is 90, what is the probability that another student randomly selected has an IQ score of below 90?
A previous study of nickels showed that the standard deviation of the weight of nickels is 150 milligrams.
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