Ethan was surveying his field and saw some cows and ducks. Ethan counted a total of 74 heads and 258 legs. Assuming there are no mutations in the animals, determine exactly how many ducks and cows he saw.
Let X represent the number of ducks and y represent the cows.
Total Equation:
2 + y = 74
Legs Equation:
2x + 4y= 258
How many ducks?
How many cows?

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.