A researcher investigated the effect of volume of gackground noise on participants accuracy rates while performing a boring task he tested three groups of randomly selected students and obtained the following meands and sums of squares

Low volume Moderate volume High volume
mean 61.5 65.5 48.25
Sample size 4 5 7

State the hypothesis testing

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

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