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The world's smallest mammal is the bumblebee bat. Such bats are roughly the same size of a large bumblebee. Listed below are the weights (in grams) from a sample of these bats. Assuming that all such bats have a standard deviation of .3 grams, use a significance level of .05 to test the claim that these bats are from the same population with a known mean of 1.8 grams. Do the bats appear to be from the same population ? You may assume the sample data comes from a population that follows a normal distribution.
2.13 1.31 1.91 1.92 1.77 1.64 2.29 1.99 2.33 2.49 2.22
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
Show the sampling distribution of line over x where line over x is the sample mean annual cost of automobile insurance.
In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income.
Calculate correlation coefficient for these sample data.
As you know, the percentile for a value is a measure of where that value stands with respect to the rest of the data. As a criterion for college admissions, why would many schools use a percentile value for a standardized test, rather than a raw s..
What is the expected number of customers that will have to wait more than 6 hours?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
In baseball, the term "batting average" is employed as one way to measure a player's offensive performance. If we were to consider the idea of batting average in statistical sense
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be
Compute the mean, standard deviation, median, and standard error for each group.
CAPM and Expected return. If the risk-free rate is 6 percent and the expected rate of return on the market portfolio is 14 percent, is a security with a beta of 1.25 and an expected rate of return of 16 percent overpriced or under priced?
Would this be a T-value distribution? Can you take me through the steps to determine upper and lower limits of a 95% confidence interval?
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