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The grand mean can only be calculated if the three samples are of equal size. In this case, the grand mean is the mean of the three sample means. In this case, it would be (10+20+15)/3 = 15.
However, in the sample sizes are not equal you must take the weighted mean. One option would be to assign, to each of the three means, an importance that reflects its sample size. So, if in the above example, the sample sizes were a, b and c the grand mean would be
(10a + 20b + 15c)/(a+b+c)
It is easy to show that the grand mean becomes the mean of the three sample means when a = b = c.
What else can I help you with?
When is the sample mean over repeated samples from the same population or process not normally distributed?
Provided the samples are independent, the Central Limit Theorem will ensure that the sample means will be distributed approximately normally with mean equal to the population mean.
What does equalatural triangle mean?
it means three
What does three fourths oz mean?
It means three quarters of one ounce.
What is a score value?
for a normal-shaped distribution with n=50 and siqma =8 : a- what proportion of the scores have values between 46 and 54? b- for samples of n= 4, what means have values what proportion of the sample mean have values between 46 and 54? c- for samples of n= 16, what means have values what proportion of the sample mean have values between 46 and 54?
What does rule of three mean in English?
"The rule of three" means that things often occur in groups of three.
What in money grand mean?
One grand means 1,000
Does grand mean million?
No It means Thousand.
What does grand mean?
"Grand" is from the French word for big, and means large or imposing.
What does grand-mère mean in English?
Grand-mère (feminine noun) means 'grandmother' in English.
When is the sample mean over repeated samples from the same population or process not normally distributed?
Provided the samples are independent, the Central Limit Theorem will ensure that the sample means will be distributed approximately normally with mean equal to the population mean.
What does the French word grand mean in English?
Grand means big, tall, large in English.
What does le grand mean?
"le grand" means "the big" or "the tall" in French.
What does imnense mean?
Immense means very large or grand.
Will all random samples from a given population have the same mean?
Data from random samples will not always include the same values. Values are chosen randomly and they may or may not be the same. So means will vary among random samples.
What does mon grand-père mean in English?
mon grand-père means my grandfather in French
What does gttdi mean?
it means grand turismo turbo diseal injection
What does memere mean?
Memere means grand-mother for french canadians
