standard deviation frequency distribution table

The blood urea nitrogen (in milligrams per deciliter - mg/dl) count of 20 randomly selected patients is shown in the frequency distribution table. Blood urea nitrogen Frequency 11 - 13 3 13 - 15 4 15 - 17 3 17 - 19 5 19 - 21 5 Find the variance and stand..

Standard Deviation - of a statistical data is defined as the positive square root of the arithmetic mean of the squared deviations of items from their arithmetic mean of the series under consideration. The standard deviation is denoted by s (sigma)...

The weight (in grams) of a sample of 50 eggs are as shown in the frequency distribution table. Weight Frequency 80 - 84 2 85 - 89 6 90 - 94 12 95 - 99 14 100 - 104 10 105 - 109 5 110 - 114 1 Find the variance and standard deviation. => 6.8..

Sixty eight randomly selected refrigerators were tested to determine their life span (in years). The relevant frequency distribution is as shown. Lifetime of refrigerators Frequency 10.5 - 14.5 6 14.5 - 18.5 12 18.5 - 22.5 25 22.5 - 26.5 17 26.5 - 30.5 8 Find the varia..

80 randomly selected batteries were tested to determine their lifetime (in hours). The following frequency distribution was obtained. Lifetime of batteries Frequency 63.5 - 74.5 10 74.5 - 85.5 15 85.5 - 96.5 22 96.5 - 107.5 17 107.5 - 118.5 11 118.5 - 129.5 5 Find the ..

Frequency Distribution - A teacher gave a test to a class of 26 students. The maximum mark is 5. The marks obtained by the pupils are: Such data as above is called ungrouped (or raw) data. We may arrange the marks in ascending or descending order. The data so represented is call..

The rate of fuel consumption (in miles per gallon) of 30 selected sports utility vehicles are shown in the frequency distribution table. Fuel consumption Frequency 11.5 - 12.5 6 12.5 - 13.5 1 13.5 - 14.5 3 14.5 - 15.5 6 15.5 - 16.5 8 16.5 - 17.5 2 17.5 - 18.5..

Cumulative frequency is obtained by adding the frequency of a class interval and the frequencies of the preceding intervals upto that class interval. This is explained by an example below. The following frequency distribution table gives t..

The heights of a group of young women aged 16 - 25 years was found to be normally distributed with a mean of 62.4 inches and a standard deviation of 1.5 inches. Find the probability of a woman having a height between 60 inches and 65 inches, using the standard..

In a frequency distribution, the mid-value of each class is obtained. Then on the graph paper, the frequency is plotted against the corresponding mid-value. These points are joined by straight lines. These straight lines may be extended in both directions to meet the X..