In 1979 , only $ 10 \% $ of the students in the city school district were classified as being learning disabled. A school psychologist suspects that the proportion of learning-disabled children has increased dramatically over the years. To demonstrate this point, a random sample of $ n=600 $ students is selected. In this sample there are 74 students who have been identified as learning-disabled. You will use this information to determine if the sample indicates a change in the proportion of learning-disabled students at a $ 0.01 $ level of significance. Based on the researcher's understanding of the situation, how many tails would this hypothesis test have? one-tailed test. two-tailed test Choose the correct pair of hypotheses for this situation: \begin{tabular}{|c|c|c|} \hline (A) & (B) & (C) \ \hline \hline$ H_{0}: p=0.1 $ & $ H_{0}: p=0.1 $ & $ H_{0}: p=0.1 $ \ \hline$ H_{a}: p0.1 $ \ \hline \multicolumn{3}{|c|}{ (D) } \ \hline \hline$ H_{n}: p=0.123 $ & $ H_{0}: p=0.123 $ & $ H_{0}: p=0.123 $ \ $ H_{a}: p0.123 $ \ \hline \end{tabular} (A) (B) (C) (D) (E) (F)

Question

In 1979 , only $ 10 \% $ of the students in the city school district were classified as being learning disabled. A school psychologist suspects that the proportion of learning-disabled children has increased dramatically over the years. To demonstrate this point, a random sample of $ n=600 $ students is selected. In this sample there are 74 students who have been identified as learning-disabled. You will use this information to determine if the sample indicates a change in the proportion of learning-disabled students at a $ 0.01 $ level of significance. Based on the researcher's understanding of the situation, how many tails would this hypothesis test have? one-tailed test. two-tailed test Choose the correct pair of hypotheses for this situation: \begin{tabular}{|c|c|c|} \hline (A) & (B) & (C) \ \hline \hline$ H_{0}: p=0.1 $ & $ H_{0}: p=0.1 $ & $ H_{0}: p=0.1 $ \ \hline$ H_{a}: p<0.1 $ & $ H_{a}: p \neq 0.1 $ & $ H_{a}: p>0.1 $ \ \hline \multicolumn{3}{|c|}{ (D) } \ \hline \hline$ H_{n}: p=0.123 $ & $ H_{0}: p=0.123 $ & $ H_{0}: p=0.123 $ \ $ H_{a}: p<0.123 $ & $ H_{a}: p \neq 0.123 $ & $ H_{a}: p>0.123 $ \ \hline \end{tabular} (A) (B) (C) (D) (E) (F)

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