Purchase Solution

Find Standard Deviation using the computational formula

Not what you're looking for?

Ask Custom Question

"My Bank" opens a branchin a commercial district. The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Accordingly, the waiting time is recorded for all customers during these hours over a month. A random sample of 20 customers is selected; the waiting time, in minutes, is shown below:
9.50 5.0 8.02 6.00 3.40
8.33 8.35 10.49 5.32 4.08
9.20 5.40 6.17 3.00 2.32
8.35 8.02 6.00 5.15 9.00
Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.

Purchase this Solution
Solution Preview

Please see attached file, but I am including text here just in case. The formula will not appear here.
<br>
<br>This is the alternate formula usually used ...

Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

View More Free Quizzes
Related BrainMass Solutions

  • Conceptual Formula computations

    a) s^2 = Sumf (x-mean)^2 / n-1 Use to find standard deviant using conceptual formula b) Compute varience of f table using computational version of formula s^2 = n*Sumf*x^2-(Sumf*x)^2 /n(n-1)Use this to find standard deviation What do you notice either

  • Standard Deviation of doctors' ages

    Age Frequency 35-39 2 40-44 2 45-49 1 50-54 3 55-59 4 60-64 2 Using the computational formula, calculate the Standard Deviation of doctors' ages Hi This question uses a frequency distribution to describe the age scores

  • Descriptive Statiatics

    For the following sample of scores: 2, 6, 1, 4, 2, 2, 4, 3, 2 Find the mean, variance and standard deviation 6. A sample of size 7 (n = 7) has a mean of M = 9. One of the sample scores is changed from x = 19 to x = 5.

  • Central Tendency and Comparing Measures Variability

    (Note; the computational formula Works best with this scores) Please see the attached word document to see the complete solutions with formulas.

  • Basic Statistics

    All of the above Part II Short Answers and Computational Questions 1. What is the relationship between the variance and the standard deviation? What are the symbols used to represent the sample variance and standard deviation?

  • quadratic formula

    Using the quadratic formula, we can find the solution as . This gives the solution for x as 3 or 2. Now, we consider the quadratic equation again.

  • Find the mean, variance and standard deviation

    The formula for mean, variance and standard deviation are as follows Mean = , Variance = Standard deviation = where x = mid values of the classes, f = frequencies and N = Total frequency Procedure: Compute the mid values of the classes using

  • Variance and Standard Deviation

    The solution shows you how to use Excel to find the variance and standard deviation of a sample.

  • Independent and Dependent Variables of Experiments

    (Note the computational formula works best with these scores.

View More Related Solutions