give the sample standard deviation of this data set: 20, 25, 35, 40

2- Calculate the Quartile Deviation (Q.D) and coefficient of Q.D. for the databelow:( 230 , 620 , 390 , 350 , 320 , 150 )

sample of 8 students scored the following grades: 20, 40, 35, 30, 57, 57, 46, 42. Find the sample mean, mode and median. OCompute the standard deviation.

The following population data were collected: 86, 45, 54, 94, 69, 66, 84, 94, 76, 45, 39, 89, 49, 53, 78. Find the population variance.

Calculate the standard deviation and variance for the distribution below: 3, 4, 5, 5, 6, 7

What is the standard deviation of the following sample data:  40, 49, 23, 47, 40, 17.   Round to 2 decimal places as needed.

Find the standard deviation of the sample data below: 3,5,6,9 (Answer: 1 decimal place) Type your answer... Previous

Of the data sets below, which has the largest standard deviation?Set A:   1, 2, 3, 4Set B:   1, 1, 4, 7Set C:   0, 5, 5, 10Set D:   6, 6, 6, 6   Set A Set B  Set C  Set D

Find the variance and the standard deviation for the following numbers: 1, 5, 6, 8. Show all your work. Do not simplify fractions/products/similar.

The average daily volume of a computer stock in 2011 was u = 35.1 million shares, according to a reliable source. A stock analyst believes that the stock volume in 2014 is different from the 2011 level. Based on a random sample of 30 trading days in 2014, he finds the sample mean to be 31.9 million shares, with a standard deviation of s = 12.7 million shares. Test the hypotheses by constructing a 95% confidence interval. Complete parts (a) through (c) below. (a) State the hypotheses for the test. Họ: 35.1 million shares H,: V35.1 million shares