Stats Help for College-level Students

Sample and Population Standard Deviation, Mean and Variance

1. What are standard deviation, mean, and variance for sample and populations and what Greek letters represent them? Give examples please.

Regression

If you had to choose a business topic that would affect the biologics industry and write a regression paper, what exactly is the definition of regression in statistics and what would you think would be a good topic to look at if you worked for a pharmaceutical/biologics company who creates vaccines and medicines. Thanks

Statistic Trends/Series

Please see below: Citing significant strides in math and science by women of all ethnic backgrounds, the College Broad says that the male-female gap on Scholastic Assessment Test scores continue to narrow among high school students. The average SAT scores for men and women from 1990 to 1994 are shown below: Verbal Men ...continues

Null and hypothesis and z value

The Problem Solving Inventory (PSI) has a normal distribution with mean = 90 and standard deviation = 15. A researcher suspects that the mean for female students is higher than 90. She takes an SRS of 25 female students and gives PSI. Suppose we know that scores in the population of female students are normally distributed with ...continues

I need a nonparametric test- Mann Whitney Means test, presented in complete APA format (! )

Can you please do a non parametric test (Mann Whitney) on the figures and give me both the full print out of the calculation as well as an APA summary. My department is very strict on the APA presentation and I need a bullet proof APA style format. For the general print out let me know which programme you used. You will f ...continues

Identification of Parametric and Nonparametic Data

Please help me identify if each of the following situations "P" if it is an example of parametric data or "NP" if it is an example of nonparametric data. 1. In a comparison of two towns, is the average height of its residents the same? _____ 2. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time- ...continues

Statistics - Probability

1) A record store owner wants to determine consumer tastes. She decides to observe customers in her store on a particular day and record the number of minutes the each spends in the Alternative Music and Rap sections of the store. She came up with the following data: Alternative Music Rap Mean = x = 25 Mean = 20 St ...continues

Kurtosis and skewness Test

I lack software to print good graphs! Please check the data given and give Kurtosis / Skewness Tests on them! Please add a small explaination to each graph what they mean! I also need to know the software you used. Please post graph saved as gif or jpeg format! Any questions please let me know before you do it!

Statistics

In a normal distribution with mean 30 and variance 25, at what percentile rank does a score of 42 fall? Among twenty-five articles, nine are defective, six having only minor defects and three having major defects. Determine the probability that an article selected at random has major defects given that it has defec ...continues

Mathematical statistics and data analysis

Probability distribution and functions