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All the customers who entered a store on a particular day were given a surgery to fill out concerning their opinions of the service at the store? What type of sample is this? I can't decide between voluntary response or convience.
for women age 25-34 with full-time jobs the average income in 2004 was 32000 and the sd for income was 26000. assuming
Mary randomly picks three marbles from a jar that contains 3 red and 5 blue marbles.
In a randomly controlled trial conducted with children suffering from croup, 46 randomly selected children were treated with ow humidity while another group of randomly selected children were treated with high humidity.
Since Variable 15 was determined to be categoric, regression was not appropriate to use; so I used Analysis of Variance (ANOVA) to examine if there was a significant relationship between Variable 8 and 15. The results (using Systat 13.0) are print..
I want to see two methods are the significantly same or not. Each methods has 5 variables are inside. so I would like to see each 5 variables from methods A and B are significantly the same and overall the two methods are significantly same or not..
About 20% of babies born with a certain ailment recover fully. A hospital is caring for five babies born with this ailment. The random variable represents the number of babies that recover fully.
test the slope of the regression line for the following data. use alpha equals .01.x 139 118 104 88 66 29 25y 26 30 48
Sample of 25 rockets in his latest spaceship. He thinks they might weight less than the average rocket. The sample has on average 102 lbs with a standard deviation of 10 lbs. The average rocket weights 106 lbs.
At the 5% level of significance test whether the bottling process is carried out accurately or whether the filling machinery needs calibration. Use both the critical and the p-value approaches.
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
you hear on the local news that for the city of kalamazoo the proportion of people who support president obama is 0.53.
It has been known from the past experience that two percents of your emails are spam. Suppose you will receive 200 emails. Find the mean and variance of the number of spam emails among those
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