In order to find the mean weight of elephants in a zoo, the weights of..
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..
A researcher was interested in the effects of hunger on how fast a rat..
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..
The table shows the number of fruits sold at a fruit store on seven co..
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..
Merits and Demerits of Mean Deviation
Merits: - Mean deviation is easy to calculate. This measure is simple to understand. This can be calculated from any average. Its value is based upon all the (observations) items of the data. It is less affected by extreme observations. It gives us an idea about how th..
To find mean for grouped data
Calculate the mean marks in the distribution below by the 'Direct Method..
Calculate the mean marks in the distribution below by the 'Direct Method..Calculation of Standard Deviation for discrete series
In the discrete series, when deviations are taken from actual mean, the formula ..
In the discrete series, when deviations are taken from actual mean, the formula ..Which of the statement(s) are not true about degrees of freedom?I. The..
Which of the statement(s) are not true about degrees of freedom? I. The term "degrees of freedom" is used to describe the number of values in the final calculation of a statistic that are free to vary. II. The degrees of freedom decrease when we have to estimate more parameters. III. The ..
95% confidence interval of a population mean(μ) with a sample size ..
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?..
Step 2 :
Take deviations of the item from the calculated mean and call it ..
Standard Deviation for continuous series
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..
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