A decade-old study found that the proportion, p , of high school seniors who believed that "getting rich" was an important personal goal was 70%. A researcher decides to test whether or not that percentage still stands. He finds that, among the 235 high school seniors in his random sample, 144 believe that "getting rich" is an important goal. Can he conclude, at the 0.01 level of significance, that the proportion has indeed changed? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. a) State the null hypothesis H0? and the alternative hypothesis H1? . H0:? H1:? (b) Determine the type of test statistic to use.   ▼(Choose one) z ? t ? chi square? f ?   (c) Find the value of the test statistic. ? (Round to three or more decimal places.)   (d) Find the two critical values. ? (Round to three or more decimal places.) and (e) Can we conclude that the proportion of high school seniors who believe that "getting rich" is an important goal has changed? Yes or No?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.