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Two samples are taken from different populations, one with sample size 1 = 5 and one with sample size 2 = 11. The mean of the first sample is 1 = 37.9 and the mean of the second sample is 2 = 406.3, with variances 2 = 64.2 and 2 = 135.1, repectively. Can we conclude that the variances of the12 two populations differ (use = .05)?
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
The value of a certain automobile purchased in 1997 can be approximated by the function V(t) = 22(0.85)^t , where t is the time
Calculate the median from the following data:Mid values : 115,125,135,145,155,165,175,185,195frequency : 6,25,48,72,116,60,38,22,3.
a journal article reports that a sample of size 5 was used as a basis for calculating a 95 ci for the true average
If Mark uses the normal approximation of the binomial distribution to model the number of home runs, what is the variance for a total of 150 games?
?Start with a eukaryotic cell that has a diploid number of chromosomes (2n = 4). Begin by showing the cell in interphase.
Churches. For your political science class, you'd like to take a survey from a sample of all the Catholic Church members in your city.
Are the two input variables correlated with the output? Use Excel's CORREL function to find out. Interpret your results intuitively.
A random sample of the starting salaries of 35 randomly selected graduates with bachelor's degrees last year gave sample mean and standard deviation $41,202.
2. the two components are placed in parallel (so that a single operating component is sufficient for the system to function) and the two components operate at the same time;
For each characteristic, explain whether the random variable is continuous or discrete.- The number of left-handed individuals in a sample of 100 people.
In a study comparing response rates between treated and non-treated subjects, 60% of subjects are observed to have both responded and been treated.
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