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# Math 110 Elementary Statistics

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• ###### Samples of what you should know before taking Math 110:
1. If x = 14 and y = 11, calculate the value • Solution 2. Solve the following formula for x. • Solution  3. Given the function , plot the points on the graph of this function for the x-values 2, 3, 4.
• Solution 4. Simplify the following expression and write the answer as a decimal. • Solution 5. Graph the following inequality on a number line: 23.478 < x < 35.962
• Solution • ###### Samples of what you will learn in Math 110:
1. For the given data set, build a stem-and-leaf plot. 12, 14, 14, 21, 22, 28, 29, 31, 33
• Solution 2. A die has 6 sides labeled 1, 2, 3, 4, 5, 6. Find the probability of rolling a 2.
• Solution 3. Find the probability that a coin is flipped 8 times and we get tails exactly 3 times.
• Solution 4. A sample is taken from a population. The sample values are 12, 14, 14, 21, 22, 28, 29, 31, 33.  Use a 5% significance to test the claim that the mean population value is above 29.0.
• Solution
The evidence indicates that it is unlikely that the population mean is above 29.0.
5. The following data are child ages and weights. Build a regression model and use the model to predict the weight of a 10-year-old child. Explain the prediction.

6 6 7 8 8 9 9 10 11
70 60 70 60 90 70 80 90 120
• Solution
The model is The predicted weight is Based on our data, the predicted weight of a 10-year-old child is 94.15 pounds