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?

A researcher is interested in examining the relationship between ACT scores and college GPA.    Participant ACT  ?̅ = 29.67; ?? = 3.39 GPA  ?̅ = 3.30; ?? = .52 1 24 2.75 2 28 3.25 3 29 3.50 4 35 3.75 5 34 4.00 6 30 3.80 7 29 2.60 8 27 2.68 9 31 3.36 Predict the GPA from an ACT score of 22. Predict the GPA from an ACT score of 25. Find the standard error of the estimate. What does this tell you about your predictions?

A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…

A nonprofit company concerned with the school dropout rates has designed a tutoring program aimed at students between 16 to 18 years old. A national center for educational statistics reported that the high school dropout rate for the year 2000 was 10.9​%.One school​ district, who adopted the use of the​ nonprofit's tutoring program and whose dropout rate has always been very close to the national​ average, reported in 2004 that 158 of their 1769 students dropped out. Is their experience evidence that the tutoring program has been​ effective?   Determine the hypotheses for this test. Choose the correct answer below A. H0​: p=0.109 HA​: p≠0.109   B. H0​: p≠0.109 HA​: p=0.109   C. H0​: p=0.109 HA​: p<0.109   D. H0​: p=0.109 HA​: p≥0.109   E. H0​: p≥0.109 HA​: p=0.109   F. H0​: p≤0.109 HA​: p=0.109   Compute the test statistic. enter your response here ​*______*   Find the​ P-value. enter your response here* ______* 3. Is their experience evidence that the tutoring…