# Essay on Mgmt Chapter 6 Homework

670 Words Jun 30th, 2013 3 Pages
6.1 Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), what is the probability that
a. Z is less than 1.57?
b. Z is greater than 1.84?
c. Z is between 1.57 and 1.84?
d. Z is less than 1.57 or greater than 1.84?

6.5 Given a normal distribution m = 100 and s = 10 what is the probability that a. X > 75? b. X < 70? c. X < 80 or X > 100? d. Between what two X values (symmetrically distributed around the mean) are 80% of the values?

6.7 In a recent year, about two-thirds of U.S. households purchased ground coffee. Consider the annual ground cof- fee expenditures for households purchasing ground coffee, assuming that these expenditures are
Source: Data extracted from money.cnn.com, June 19, 2009.
Decide whether the market capitalization of companies in the
DJIA appears to be approximately normally distributed by
a. comparing data characteristics to theoretical properties.
b. constructing a normal probability plot.
c. constructing a histogram.

Problem 1
* Session 4 Data on excel spreadsheet is for the following assignment and the assignment is to be done on the session 4 Data excel spreadsheet.
The normal distribution is applicable to many (not all) measured numeric variables, e.g., weight. It is common in nature, manufacturing, etc. for complex processes with many underlying factors. Normal distributions are bell shaped and characterized by center (mean) and spread (variance and standard deviation).

The standard normal is a very special case where the mean is 0 and standard deviation 1, and is useful to determine probabilities for all normal distributions. The empirical rule summarizes how observations occur in terms of standard deviations. Data more than 2 standard deviations from the mean are called outliers and may reflect data entry error or unusual conditions, which can be informative.
1. To obtain current data, open the attached, click the Enable Editing button
2. Click the Enable Content button
3. Click on to run a macro program that takes a snapshot of the data in column A and copies to C. FYI, each time you

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