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STA 3032 Lecture 2: 1.2-1.4

United States

Probability and Statistics for Engineers

Statistics

Mohamed Awwad

University of Central Florida

Solid Mechanics

Engineering Analysis-Statics

Structure and Properties of Materials

Principles of Electrical Engineering

Calculus with Analytic Geometry I

Calculus with Analytic Geometry III

Ordinary Differential Equations I

<p>Use the standard normal table to find p(z ≥ 1.4). Round to the nearest percent.</p>

<p>On a sea-level standard day, a pressure gage, moored below the surface of the ocean (SG = 1.025), reads an absolute pressure of 1.4 MPa. How deep is the instrument? (a) 4 m, (b) 129 m, (c) 133 m, (d) 140 m, (e) 2080 m</p>

<div>One hundred draws are made at random with replacement from box A, and 250 are made with replacement from box B.</div>
<div> </div>
<div>a. 50 of the draws from box A are positive, compared to 131 from box B; 50% versus 52.4%. Is this difference real, or due to chance?</div>
<div> </div>
<div>b. The draws from box A average 1.4 and their SD is 15.3; the draws from box B average 6.3 and their SD is 16.1. Is the difference between the averages statistically significant?</div>

STA 3032 Lecture 2: 1.2-1.4

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