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According to the ICR Research Group, 63% of Americans in the 18-34 age group say they are comfortable filing income tax returns electronically, compared to just 49% of those who are 55-64.
Using the 0.025 level of significance, and assuming there were 200 persons surveyed from each age group, examine whether Americans in the 18-34 age group might be more comfortable with electronic filing than their counterparts in the 55-64 group. Determine and interpret the p-value for the test.
If a die is rolled one time, classical probability would indicate that the probability of a "two" should be . If the die is rolled 60 times and comes up "two" only 9 times, does this suggest that the die is "loaded"? Why or why not?
consider the following. give your answers correct to two decimal places.a determine the value of the confidence
consider 16 gallons of genetically modied tomatoes. suppose that 75 of those tomatoes have an increased resistance to
1. a random sample of 26 offshore oil workers took part in a simulated escape exercise and their times sec to complete
a. draw a normal probability plot for the data set derived according to these instructions. show all the calculations
Assume that the following are data from cluster sampling with simple random sampling of clusters. There are 10 clusters (primary units) and a total of 100 secondary units in the population.
Most traffic lights are set so that there is enough time for pedestrians to cross the road safely. A recent study indicates that a large number of elderly cannot get across the road in the usual 15 seconds allowed.
for the most recent year available the mean annual cost to attend a private university in the united states was 26889.
suppose that the weights of cinder blocks at a local construction yard follow a normal distribution with mean of 20 kg
The following indices: z, t, F, r, Chi square. Using the data below, show that analyses using each of the three statistics yields the same or similar outcomes.
Check the conditions that allow you to use the test statistic, and, if appropriate, calculate the test statistic. Calculate the p-value and include the probability notation statement. State whether you reject or do not reject the null hypothesis.
What is the independent variable (x-values)? What is the dependent variable (y-values)? What is the equation for the line of best fit that is determined using the Microsoft Excel Regression Analysis tool on the data
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