Tool to convert letters to numbers and vice versa. The letter-to-number cipher consist in replacing each letter by its position in the alphabet
The probability that the the sample mean would be less than x=132.25 will be calculated as follows:
z=(x-σ)/μ
μ- mean
σ- standard deviation
z=(132.25-138)/28=-0.2054
thus:
P(X≤x)=0.4207=42.07%
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The step in which Shawna make an error is in; Step 2; She incorrectly squared the numbers.
<h3>How to solve pythagoras theorem?</h3>
From the given triangle in the brainly link, we can deduce the correct steps through pythagoras theorem as:
Step 1; a² + 7² = 25²
Step 2; a² + 49 = 625
Step 3; a² = 576
Step 4; Taking square roots of both sides of step 3 gives us;
a = 24
Thus, the step in which Shawna make an error is in Step 2 because She incorrectly squared the numbers.
Read more about Pythagoras Theorem at; brainly.com/question/11280246