The contingency table shows the distribution of a random sample of fatal pedestrian motor vehicle collisions by time of day and by gender in a recent year.                                       Time of day Gender     12 - 6.       6 - 12.      12 - 6.     6 -  12 Male          657.           591.         905.         940 Female.     260.          358.        585          514 a). Find the expected counts for this table. b) Are the two variables independent? Test using a 5% significance level.

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A:

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Q: what is the sample variance and standard deviation of 21​,16​,3​,9​,11

A: The formula for sample variance and standard deviation is given by:

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A: Given:-

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.