One study, based on responses from 1,017 randomly selected teenagers, concluded that 39% of teenagers cite grades as their great
1 answer:
Answer:
The hypothesis formulae will be
H0 : p = 0.5
Ha : p < 0.5
we will reject H0.
Step-by-step explanation:
Number of responses ( n ) = 1017
percentage( p ) = 39% = 0.39
significance level ( ∝ ) = 0.05
P0 = 50% = 0.5
<u>Test the claim that fewer than half of all teenagers feel the pressure </u>
The hypothesis formulae will be
H0 : p = 0.5
Ha : p < 0.5
Perform the test statistic
Test statistic ( Z ) = -6.957
P-value < 0.05 we will reject H0.
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Dimensions of the room in cm = 2.54 x 12 by 15 x 2.54 by 2.54 x 8.5 = 30.48 by 38.1 by 21.59
Volume of the room in cubic cm = 30.48 x 38.1 x 21.59 cubic cm = 25,072.21 cubic cm
Given that the density of air at room temperature is
, thus the mass of air in the room = 25,072.21 x 0.00118 = 29.59 g = 0.0296 kg
Given that the lethal dose of HCN is approximately 300 mg HCN per kilogram of air when inhaled, thus the <span>amount of HCN that gives the lethal dose in the small laboratory room is given by 300 x 0.0296 = 8.88 mg.</span>
Volume of the room in cubic cm = 30.48 x 38.1 x 21.59 cubic cm = 25,072.21 cubic cm
Given that the density of air at room temperature is
Given that the lethal dose of HCN is approximately 300 mg HCN per kilogram of air when inhaled, thus the <span>amount of HCN that gives the lethal dose in the small laboratory room is given by 300 x 0.0296 = 8.88 mg.</span>