I just finished my 32nd teaching year at Tuxedo. Tuxedo is a small school district which has required me to teach every different math class ranging from Math 7 to AP Calculus and AP Statistics.
In Exercises 63-84, use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.
$\left\{ \begin{array}{l}-x + y = -22 \\3x + 4y = 4 \\4x - 8y = 32\end{array}\right. $
Why is the sign test the simplest nonparametric test to use?
What population parameter can be tested with the sign test?
In the sign test, what is used as the test value when $n \leq 25 ?$
When $n>25,$ what is used in place of Table $\mathrm{J}$ for the sign test?
For Exercises 5 through $20,$ perform these steps.a. State the hypotheses and identify the claim.b. Find the critical value(s).c. Compute the test value.d. Make the decision.e. Summarize the results.Use the traditional method of hypothesis testing unless otherwise specified.Ages at First Marriage for Women The median age at first marriage in 2014 for women was 27 years- the highest it has ever been. A random sample of women's ages (in years) from recently applied for marriage licenses resulted in the following set of ages. At $\alpha=0.05,$ is there sufficient evidence that the median is not 27 years?$$\begin{array}{lllll}{34.6} & {31.2} & {28.9} & {28.4} & {24.3} \\ {29.8} & {25.9} & {21.4} & {25.1} & {26.2} \\ {28.3} & {30.6} & {35.6} & {34.2} & {34.1}\end{array}$$
