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Changping Wang

May 2003
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  • Responses: 2517


  • BSc , Wuhan Univ. China, 1989
  • MA, Shandong Univ., 1992


  • Mathematics
  • Statistics
  • Physics

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I need help matching statistical symbols and definitions

I need your HELP with the matching of STATISTICAL SYMBOLS & DEFINITIONS


1.The average of the squared deviation scores from a distribution menas.
2. Midpoint in the distribution of numbers.
3. It has to do with the accuracy and precision of a measurement procedure.
4.Examines if a READ MORE »

Statistics / Hypothesis Testing » 74518

Statistics Parametric and Nonparametric Data Identification Assignment

1. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF?

2. From a written survey whe READ MORE »

Statistics / Hypothesis Testing / Nonparametric Tests » 105498

Probability Distributions

(See attached files for full problem description)

Using our data set from Unit 1, compose an email to the head of the American Intellectual Union which discusses the following:
1. How you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals? Job READ MORE »

Statistics / Probability » 67994

Are the Three Treatment Means Equal?

Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.

a. State the null hypothesis and the alternative hypothesis.
b. What is the decision rule?
c. Compute SST, SSE, and SS total.
d. Complete an ANOVA table.
e. State your READ MORE »

Statistics / Correlation and Regression Analysis / Partition of Variance / Analysis of Variance » 48867

The American Sugar Producers Association

12. The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.

a. What is the value of the population mean? What is the best estimate of this value READ MORE »

Statistics / Hypothesis Testing / Frequentist Inference / Confidence Interval » 61082
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