Directions: Answer all questions as completely as possible. Partial credit will

Question

Directions: Answer all questions as completely as possible. Partial credit will be given for work completed, so be sure to show all of your work (Use the scrap paper and attach it to your exam f hecessary). You may use your text, your notes, and any other paper resources at your disposal during this exam 1. There have been many studies that suggest red-heads experience pain sensitivity differenty than vioiout red hair (Seriously. You can look it upt) What are the independent and dependent Independent variable: Dependent variable 2. What is the formula for calculating a z-score for any one value of a continuous, normally variable? 3. What is the formula for calculating a z-score for any sample of size n of a continuous, distributed variable? 4. A continuous, normally distributed variable has a standard deviation of 20. Find the z-scores corresponding to each of the following values: (a) A score that is 20 points above the mean: (b) A score that is 10 points below the mean: (c) A score that is 15 points above the mean: (d) A score that is 30 points below the mean: 5. For the numbers below find the area between the mean and the z score. (c) z 2.07 (a) z 1.17 (d) z- -1.37 (b) z-85

Explanation / Answer

1. hair colour is independent variable & pain senstivity is dependent variable.

2. z = (x – ?) / ?

x = value, ? = mean , ? = standard deviation

3. z = (x – ?) / (? / ?n)

4. (a) z = (20) / 20 = 1

(b) z = -10 / 20 = -0.5

(c) z = 15 / 20 = 0.75

(d) z = -30/20 = -1.5

5 . by table

(a) 0.879

(b) 0.197

(c) 0.98

(d) 0.085

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