Introductory statistics UE Past Papers Questions.


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(1756) Question Category: Mathematical Calculation

Suppose you are given the following data,

sum_{i=1}^{10}P_i=100  , sum_{i=1}^{10}Q_i=564, sum_{i=1}^{10}P_iQ_i=6,945, Var(P)=(376)^2 and Var(Q)=(4752.4)^2, where P= the predicator variable and Q= is the response variable.

  1. Compute the correlation coefficient and coefficient of determination
  2. Fit the regression line hat{Q_i}=hat{eta}_0 +hat{eta}_1P_i and state whether it is a good or poor fit.
  3. Interpret the parameters of the model in part (b) above

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UNSOLVED

(2000) Question Category: Short answers

Explain briefly the four measurement scales of variables.

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(2369) Question Category: Short answers

Define the following terms

  1. Mean
  2. Median
  3. Mode

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UNSOLVED

(2370) Question Category: Short answers

Differentiate the following terms

  1. Qualitative data and Quantitative data
  2. Probability sampling and Non-probability sampling

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UNSOLVED

(2371) Question Category: Mathematical Calculation

The mean and standard deviation of a set of 100 observations were found to be 35 and 4 respectively. If the observations 39, 32 and 34 were omitted from the 100 observations, find the mean and standard deviation of the remaining 97 observations. 

Answer / Solution

UNSOLVED

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