# Posts by Shawnie

Total # Posts: 5

**statistics**

Employees in a large computer firm claim that the mean salary of the firm’s programmers is less than that of its competitors. The competitor’s salary is $47,000. A random sample of 30 of the firm’s programmers has a mean salary of $46,500 with a standard ...

*June 14, 2011*

**statistics**

3) Find the test statistic for the following proportion: A collection of 500 randomly selected teachers revealed that 61% felt that all students should be required to take algebra in high school.

*June 14, 2011*

**statistics**

1) A group of scientists created 150 trials to measure whether electric shock treatment could cure paranoid delusions. Of these trials, 52 were successful. Find the margin of error E that corresponds to a 95% confidence level. The critical value for 95% confidence level is 1.96

*June 14, 2011*

**chemistry**

how much heat is needed to change 20 g of solid water at 0 c to liquid water at 15 c?

*April 6, 2011*

**physics**

A flower pot is thrown out of a window with a horizontal velocity of 8 m/s. If the window is 1.5 m off the ground, how far from the window does it land?

*January 11, 2011*

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