Question

Asked Feb 5, 2020

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**Find the stansard deviation of the data summerized in the given frequency distribution. **

The test scores of 40 students are summerized in the frequency distribution below. Find the standard deviation.

Score | Students |

50-59 | 6 |

60-69 | 6 |

70-79 | 5 |

80-89 | 6 |

90-99 | 17 |

Step 1

The formula for mean and standard deviation is given by,

Step 2

The mean and standard deviation are calculated using the following table.

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