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Explore the survival probabilities of hatchling turtles and sharp nose sharks in silty, stormy waters with very rough wave action. Analyze variance, chi-square, and t-test equations to assess significant differences in data sets.
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BY ANDY GONZALEZ STATISTICS AND COMPUTER
SHARP NOSE SHARK Sharp nose sharks
Hatchling turtles Turtle hatchlings
Probability of Planula survivals Date: June 23 09 Time: 10:30 am Weather: stormy Wave action: very rough Water clarity: silty with little sunlight
Distribution of 25 sea cigar Sea cigars on a shore.
Variance Two values that are used in statistics to describe how far away your data are from the mean are Variance and Standard deviation. Set 1: 8,9,10,11,12 Set 2: 1,2,10,17,20 In the first set ,there is not much variation away from the mean. In the second set the other values are farther away from the mean.
Standard Deviation • One standard deviation is considered the numerical distance away from the mean in the positive and negative direction. So we say that it is plus or minus some number away from the mean.
Chi-square The chi-square test can be used to see if there are any significant difference between data sites or sources. We will use the chi-square test to determine if there are any significant differences between survival rates at our “SEA TURTLE BEACH SITES” when we play the SEA TURTLE GAME.
T-TEST THE T-TEST EQUATION CAN BE USE TO CALCULATE THE T-STATISTIC IS ONE DESINGNED TO TEST WHETHER THERE IS A SIGNIFICANT DIFFERENCE BETWEEN THE MEANS OF TWO INDEPENDENT SAMPLES THOSE OF YOUR (1) TREATMENT AND (2) CONTROL GROUPS.
Survival rate of caterpillars subjected to fructose Painted lady butterfly Painted lady caterpillar and chrysalis