review

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Solutions to Review for Test 3

Solutions to all but the final problem on the review are posted as an attachment here. We will discuss the final problem briefly in class on Friday.

Review for Test 3

  1. Calculate the mean, median and mode for each of the following data sets.

    1. 4, 8, 3, 3, 5, 3, 5, 7, 1, 9, 0, 2

    2. 18, 22, 22, 17, 30, 18, 12

  2. Selina claimed that in her class all of the scores on a test were either 100 or 50, so the mean must be 75. Explain whether or not this reasoning is valid.

  3. Use the data in the table to calculate the following:

    1. Range.

    2. Mean.

    3. Variance.

    4. Standard Deviation.

    \begin{array}[]{|r|c|}\hline\textbf{Salary}&\textbf{Number of Workers}\\<br />
\hline\hline\$ 18,000&2\\<br />
\$ 22,000&4\\<br />
\$ 26,000&4\\<br />
\$ 35,000&3\\<br />
\$ 38,000&12\\<br />
\$ 44,000&8\\<br />
\$ 50,000&4\\<br />
\$ 80,000&2\\<br />
\$ 150,000&1\\<br />
\hline\end{array}
  4. The youngest person in a company is 24 years old. The ranges of ages is 34 years. How old is the oldest person in the country?

Solutions to Review for Test 2

The solutions to the review are attached to this post. Please inform me if you spot any errors, or find something questionable.

Review for Test 2

The review for test 2 is attached to this post.

Solutions to Review for Test 1

The solutions to the review for test 1 are attached to this post. We will be covering these questions on Wednesday in class. Bring any questions you may have!!

Review for Test 1

Math 1120 -- Review for the First -- Exam Spring 2011

  1. Express each of the following fractions in simplest form.

    1. \displaystyle{\frac{30}{315}}

    2. \displaystyle{\frac{98}{-63}}

    3. \displaystyle{\frac{627}{704}}

    4. \displaystyle{\frac{-1230}{-3888}}

    5. \displaystyle{\frac{126}{96}}

    6. \displaystyle{\frac{35^{{10}}}{21^{{11}}}}

    7. \displaystyle{\frac{101101}{539}}

© 2011 Jason B. Hill. All Rights Reserved.