20. find the chi square value x 2l corresponding to a sample size of 23 and a confidence level of 90%
i know the answer is 12.338 but i need the steps to get there

Step-by-step explanation:

At 90% confidence level:

α = 0.10

α/2 = 0.05

At 22 degrees of freedom:

χ²L = 12.338

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step-by-step explanation:

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5