An integer greater than -2
1 answer:
On the number line below, there are arrows pointing to the left and to the right. The arrow that is pointing to the left has numbers below them; those numbers are negative numbers, including -2. 0 is mutual, meaning that it is a positive and a negative number. The numbers to the right are positive numbers. Positive numbers are greater than negative numbers, therefore, any number after 0 is greater that is greater than -2.
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<h3>Answer: choice A) 55.3%</h3>
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Explanation:
Use a Z table found in the back of your book to find that
P(Z < -0.41) = 0.3409
P(Z < 1.25) = 0.8944
So,
P(-0.41 < Z < 1.25) = P(Z < 1.25) - P(Z < -0.41)
P(-0.41 < Z < 1.25) = 0.8944 - 0.3409
P(-0.41 < Z < 1.25) = 0.5535
Now convert this to a percentage by multiplying by 100, which is the same as moving the decimal point over 2 places
0.5535 ---> 55.35%
Round this to the nearest tenth of a percent. You could argue that 55.35% rounds to either 55.3% or 55.4% since that last digit is a 5. I'm going with 55.3% since 55.4% isn't listed as an answer choice. The table I used only lists approximate values, so there is likely some rounding error somewhere. When I used my TI83 (see image below) I got roughly 0.5534 which is fairly close to 0.5535. If you want to use your TI83 or TI84 calculator, then the normalcdf function can be found by pressing the yellow "2ND" button (top left corner) and then pressing the VARS key (3rd row from the top, just to the left of the CLEAR key).