Can someone help me please?

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20

  1. 👍 0
  2. 👎 0
  3. 👁 235
  1. The "standard score" is more commonly called the "z-score".

    It is the number of "standard deviations" above the mean.

    The standard deviation is the square root of the variance, or 5 in this case.

    The number of data values is not needed to answer the question.

    A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0

    1. 👍 0
    2. 👎 0
  2. Statistics confuses me....thank you for your help :)

    1. 👍 0
    2. 👎 0
  3. A z-score is 0.6 standard deviations above the mean.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    Can someone help me with this questions. Find the variance for a given data. Rpund your answer to one more decimal place then the original data. Compute the variance. Jeanne is currently taking college zoology. The instructor

    asked by natalie on August 28, 2007
  2. Statistics

    A disadvantage of using arithmetic mean to summarize a set of data is? A. the arithmetic mean sometimes has two values. B. it can used for interval and ratio data. C. it is always different from the median. D. it can be biased by

    asked by Tykrane on December 17, 2009
  3. math

    The following is a set of data from a sample of n = 5: 7 4 9 8 The following is a set of data from a sample of n = 5: 7 4 9 8 2 a. Compute the mean, median, and mode. b. Compute the range, variance, standard deviation, and

    asked by dannie0913 on October 27, 2012
  4. Statistics

    I you are told that a data set has a mean of 25 and a variance of 0 you can conclude that A)There is only one observation in the data set B) There are no observations in the data set C)All of the observation in the data set are 25

    asked by Dom on September 13, 2011
  5. Math

    The stem-and-leaf plot shows the heights in centimeters of Teddy Bear sunflowers grown in two different types of soil. Soil A 65,62,61,61 75,71,70 82,81 90 Soil B 59 63,69 70,72,73,76,77,78 83 a) Describe the overlap of the two

    asked by Miae on May 16, 2013
  1. algebra

    The mean of a data set is 7.8, the made is 6.6, and the median is 6.8. What is the least possible number of data values in the set? A 3 data values B 4 data values C 5 data values D 6 data values I'm not really sure how I'm

    asked by Anonymous on May 8, 2019
  2. Math

    The following data sets can be modeled linearly. Data Set M: {(14,95), (9,85), (4,65), (6,80), (3,73), (12,107), (7,64), (12,86), (10,96), (9,64), (1,44)} Data Set N: {(13,109), (9,85), (4,65), (6,80), (3,63), (12,107), (7,76),

    asked by Zaphior English on March 16, 2019
  3. Math Help me PLZ!

    1: What is the median of the data set: 25,8,10,35,5,45,40,30,20 A:10 ~ B:22.5 C:25 D:27.5 2: What is the upper quartile of the given data set: 25,8,10,35,5,45,40,30,20 A:35 B:37.5 ~ C:37 D:40 3: What is the lower quartile of the

    asked by Candy on September 12, 2018
  4. Statistics

    Use the Empirical Rule to find what two values 95% of the data will fall between for a data set with a mean of 294 and standard deviation of 13.

    asked by Denise on May 16, 2011
  5. Stat

    1. For the following scores, X Y 1 6 4 1 1 4 1 3 3 1 Sketch a scatter plot and estimate the value of the Pearson correlation. b. Compute the Pearson correlation 2. For the following set of scores, X Y 6 4 3 1 5 0 6 7 4 2 6 4 a.

    asked by Cole Brown on March 4, 2013
  6. statistic

    A researcher conducts an experiment comparing three treatment conditions with a separate sample n = 8 in each treatment. An analysis of variance is used to evaluate the data, and the results of the ANOVA are presented in the table

    asked by jay on August 28, 2012

You can view more similar questions or ask a new question.