Statistics - Sample Distribution

Related BrainMass Solutions

• Hypothesis Testing for the Motor Vehicle Department

  Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers?

• Construction of confidence intervals and proper interpretation

  Standard error of estimate is the standard deviation of the distribution of sample statistics. Example: Here we present an example of constructing the 95% confidence interval using the normal distribution for a population mean.

• T - Statistic vs. Z-Statistic

  Answer According to the central limit theorem, sampling distribution of sample mean follows normal distribution as long as the sample size is sufficiently large.

• parametric and nonparametric hypothesis test

  This is due the central limit theorem: If the sample size is big, then the distribution is approximately normal. Otherwise, we need to carry out non parametric tests.

• Confidence Intervals, Differences Between T And Z Distribution

  As a sample size approaches infinity, how does the t distribution compare to the normal z distribution? When you draw a sample from a normal distribution, what can you conclude about the sample distribution?

• Parameter estimation: bias and variability

  The distribution of sample statistics is called "unbiased" if the mean of the distribution is equal to the population parameter being estimated.

• Order Statistics-Determine the E(Yn) and V(Yn)

  34199 Order Statistics-Determine the E(Yn) and V(Yn) Let Y1statistics of a random sample of size n from a uniform distribution on [0, theta] ie) f(x)=1/theta if 00.

• Statistics - Confidence Intervals for ACT Scores

  477815 Statistics - Confidence Intervals I need help completing this question: A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4.

• Statistics Questions: Licensed Drivers Example

  Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers? Use alpha =.05. Please see the attached file. This solution provides assistance with the statistics problems.

• Importance of normal distribution to Statistics

  This is because in real life when one is interested in understanding any phenomenon, the sample size is large enough and in such cases, the shape of the distribution approaches normal shape, even if the distribution of the variable for the sample in question