If x denotes Rachael's contributions
400=16%x
2,500=x
Rachael contributed $2,500 to her 401k last year
A) The product of x and y equals 196. Thus, A) x is equal to 196 divided by y.
B) The sum of x and y is 35. By substituting A) into B), we have
B) 196 divided by y plus y equals 35. Multiplying both sides by y yields
B) 196 plus y squared equals 35y. This results in B) y squared minus 35y plus 196 equals 0.
Therefore, the solutions are X1 = 28 and X2 = 7.
z = -1.66. The Z-statistic is calculated as follows. Here X signifies the obtained proportion. p stands for the mean proportion. The formula includes the standard error for the sample. From a total of 593 surveyed students, 64 met the criteria described. Thus, if the national percentage of binge drinkers is 13.1%, she has found the proportion in her data. The resulting z statistic for the dataset is derived accordingly.
D is the correct option since it represents a combination where neither p nor a equals zero.