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Design an experiment to test the hypothesis that single-gender math classes are beneficial to adolescent females. Construct operational definitions of both the independent and dependent variables.
Your experiment should have two groups and use the matched pairs procedure.
Make a good case for your selection of the matching variable. In addition, defend your choice of either a posttest-only design or a pretest-posttest design.
determine the p-value in each case and decide whether at the 5 significance level the data provide sufficient eveidence
The state's smallest animal is a red-tailed gerbil, with a mean weight of 2.5 grams and a standard deviation of 0.25 grams. Assuming that the weights are normally distributed
A psychologist studied self-esteem scores and found the data set to be normally distributed with a mean of 50 and a standard deviation of 6. A raw score of 47 is associated with what percentile?
Determine the maximal initial size of the population in order for the probability of extinction to be at least 0.3.
A random sample of five accidents resulted in the following number of persons injured: 18, 15, 12, 19, & 21. Using the .01 significance level, can we conclude the population mean is less than 20 for all accidents?
a) Determine Katherine quantiles f,or this data. b) Determine the interquartile range for this data.
two airplanes are flying in the same direction in adjacent parallel corridors. at time t 0 the first airplane is 10 km
what is wrong with this statement? high linear correlation proves that the explanatory variable variable x caused the
Consider a large population with a mean of 170 and standard deviation of 25. A random sample of size 36 is taken from the population. Calculate the standard error of the sampling distribution of this sample mean and round your answer to the hundre..
can a pretest on mathematics skills predict success in a statistics course? the 82 students in an introductory
a biometric security device using fingerprints erroneously refuses to admit 3 in 2000 authorized persons from a
A particular intersection in Delaware is equipped with a surveillance camera. The number of traffic tickets issued to drivers passing through the intersection follows the Poisson distribution and averages 4.5 per month.
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