# statistics

Calculate SS, variance, and standard deviation for the following population of N _ 7 scores: 8, 1, 4, 3, 5, 3, 4. (Note: The definitional formula works well with these scores.)

1. 👍 0
2. 👎 0
3. 👁 319
1. Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares(SS). Divide that by the number of scores to get variance.

Standard deviation = square root of variance

1. 👍 0
2. 👎 0

## Similar Questions

1. ### stat

for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly selected college students are listed below. use a 0.10 significance level to test the claim that the

asked by carl on May 14, 2012
2. ### Statistics

Working of a problem--I have found the mean, variance and the standard deviation from the following info: The probability that a cellular phone company Kiosk sells X number of new phone contracts per day is shown below---- X=4, 5,

asked by Lori on September 25, 2010
3. ### Math

Q1. A population has a mean of µ = 80 with σ = 20. a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean? 20 because the standard

asked by Jamie on May 27, 2014
4. ### Statistics

The table below shows the LOS for a sample of 11 discharged patients. Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard

asked by Anonymous 11/9/13 on November 9, 2013
1. ### Statistics

Suppose that IQ scores have a bell-shaped distribution with a mean of 99 and a standard deviation of 12. Using the empirical rule, what percentage of IQ scores are less than 87? Please do not round your answer. 87-99 = -12/12 = -1

asked by Comet on February 1, 2016
2. ### statistics

In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the

asked by Liz on June 22, 2011
3. ### statistics

The following are all quiz scores of a student in a statistics course. Each quiz was graded on a 10-point scale. 10,6,7,6,5,8 Assuming that these scores constitute an entire population, find the standard deviation of the

asked by apple on December 19, 2011
4. ### Consumer math

Complete the chart to find the mean, variance and standard deviation. Remember to use commas and round numbers to the nearest tenth. X _ X _ X - X _ (X - X)2 1. 900 = 466.2 = The mean is 2. 35 = -398.8 = 159,041.4 The median is 3.

asked by yamilex on December 11, 2012
1. ### statistics

The sum of the squared deviation scores is SS = 20 for a population of N = 5 scores. What is the variance for this population? a. 4 b. 5 c. 80 d. 100

asked by Lyndyc on December 31, 2013
2. ### Statistics

The National Assessment of Educational Progress tested a simple random sample of 1000 thirteen year old students in both 2004 and 2008 and recorded each student's score. The average and standard deviation in 2004 were 257 and 39,

asked by ramj on June 14, 2020
3. ### statistics

a mean score on a standardized test is 50 with a standard deviation of 10. What are the following: 1. what scores fall between -1 and +1 standard deviation? 2. what percent of all scores fall between -1 and +1 standard deviation?

asked by erica on May 11, 2012
4. ### economatrics

calculate standard error when sample size is 25, sample mean is 20, sample variance is 8, population mean is 22, population variance is 64

asked by priym on November 20, 2014