Calculate the value for the test statistic, x2_, for each of these situations: . : dr-20. n-15,S-17.8
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а. Но: dr-20. n-15,S-17.8 b, H0: σ2-30, n-18, s-5.7 c. Ho: 42, 25,s 37.8 d. H,:12, 37, s 163
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