A tooth paste tube is supposed to contain 150g of toothpaste, with a s..
A tooth paste tube is supposed to contain 150g of toothpaste, with a standard deviation of 2g. A random sample of 53 tubes is found to have a mean weight of 148.5g. Does this sample differ significantly from the standard at 0.05 level of significance? => Yes or No..
Mean absolute error
The arithmetic mean of the absolute error of the different measurements taken is called MAE. Where is the true value and is the absolute erro..
The arithmetic mean of the absolute error of the different measurements taken is called MAE. Where is the true value and is the absolute erro..How to find Mean Deviation!
Mean Deviation - The mean deviation of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of items from some average value. Mean deviation is also known as average deviation . The mean deviation ..
Mean Deviation - The mean deviation of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of items from some average value. Mean deviation is also known as average deviation . The mean deviation ..To find mean of ungrouped data
It is obtained by adding the raw scores and dividing the sum by the number of items. Suppose the raw scores are x 1 , x 2 , x 3 ,, x N then, mean where M = mean x = each score or item N = number of items = sigma, which means 'summation of ' Find the mean..
It is obtained by adding the raw scores and dividing the sum by the number of items. Suppose the raw scores are x 1 , x 2 , x 3 ,, x N then, mean where M = mean x = each score or item N = number of items = sigma, which means 'summation of ' Find the mean..A gas lighter manufacturer claims that the lifespan of his gas lighter..
A gas lighter manufacturer claims that the lifespan of his gas lighter has a mean of 48 months and a standard deviation of 6 months. A sample of 50 gas lighters are tested by a consumer advocacy group. Assuming the manufacturer's claims are true, what is the probability that it ..
A car travels a distance of first 15 miles at a speed of 15 mph, next ..
A car travels a distance of first 15 miles at a speed of 15 mph, next 15 miles at 30 mph and another 15 miles at 45 mph. Find the arithmetic mean and harmonic mean of these 3 speeds. Which is the correct measure of average speed? => 2 mph, 24.55 mph, harmonic mean..
95% confidence interval of a population mean with a sample size of 18 ..
95% confidence interval of a population mean with a sample size of 18 was found out as 6.17 < μ < 6.99. Another study calculated the 95% confidence interval as 5.71 < μ < 7.46. Which among the following can be the possible sample size of the second study? => 20..
The first term of an arithmetic sequence is - 4 and the 9th term is 36..
The first term of an arithmetic sequence is - 4 and the 9 th term is 36. What is the 11 th term? => 49 or 41 or 47 or 46..
If the arithmetic mean of first n natural numbers is 8, then find the ..
If the arithmetic mean of first n natural numbers is 8, then find the value of n . => 16 or 17 or 15 or 19 or 18..
The data corresponding to the number of leaves taken per year by marri..
The data corresponding to the number of leaves taken per year by married and unmarried employees of a company is shown. Find the test value and check whether both the means differ at 99% confidence. Married 50 52 60 46 Unmarried 56 48 62 40 => - 0.243, the means do not..
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