mean calculators

In order to find the mean weight of elephants in a zoo, the weights of all the elephants were measured and the mean calculated. State which of the statements is true. => The group of elephants chosen represents the population for this study. or The group of elephants c..

For a sample mean of 35.3, and a given standard deviation the 95% confidence interval for a population mean was calculated as 33.894 < μ < 36.316. Which is the correct representation after rounding the values? => 33.894 < μ < 36.316 or 33.89 < μ..

A researcher was interested in the effects of hunger on how fast a rat will run to different kinds of rewards. There are two levels of hunger (hungry and not hungry) and two kinds of rewards (food, water). Write the degrees of freedom for the (i) variables, (ii) interaction, (iii) within (error). h..

In the discrete series, when deviations are taken from actual mean, the formula is: ..

Merits: 1. Mean deviation is easy to calculate. This measure is simple to understand. 2. This can be calculated from any average. 3. It is less affected by extreme observations. Demerits: 1. This is mathematically incomplete beca..

Calculate the mean marks in the distribution below by the 'Direct Method..

The table shows the number of fruits sold at a fruit store on seven consecutive days. Using the table, calculate the mean number of fruits sold per day. Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Fruits sold 9 12 15 18 24 6 21 => 14 or 16 or 15 or 13..

95% confidence interval of a population mean(μ) with a sample size of 60 was found out as 14.5 < μ < 17.6. Another study calculated the 95% confidence interval as 14.3 < μ < 17.8. Which among the following can be the possible sample size of the second study?..

In this series too deviations may be taken either from the actual mean or from standard mean. The calculations will be simplified if the deviation are taken from assumed mean..

Standard Deviation for continuous series - In this series too deviations may be taken either from the actual mean or from standard mean. The calculations will be simplified if the deviation are taken from assumed mean..