One study, based on responses from 1,014 randomly selected teenagers, concluded that 42% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure. Formulate the null and alternative hypotheses. Choose the correct answer below. O A. Ho p=0.5 O B. Ho p= 0.5 Ha p>0.5 H, p#05 O D. H, p=0.5 H, p<0.5 O C. Ho: p<0.5 H3 p=0.5

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A: Given: Sample size (n) = 1016 Sample proportion p^=0.42 Hypothesized proportion (p) = 0.50

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A: Null hypo. proposes that there is no difference in a set of given values.

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A: Given, p^=0.2 According to the Centers of Disease Control, about 20% of American young people…

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A: Solution-: Given: n=1011, p^=0.43, P0=0.5, α=0.05 We want to find, (a) Identify the null and…

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A: Before After D (D-Dbar)^2 140 140 0 81 220 230 10 361 110 120 10 361 240 220 -20 121 200…

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.