A poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results are given in the accompanying data table. Use a 0.01 significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do and women appear to agree, or is there a substantial difference? |Human activity Natural patterns Don't know 147 Male Female 317 318 55 52 171 Click here to view the chi-square distribution table. Identify the null and alternative hypotheses. Họ: The sex of the respondent and the choice for the cause of global warming are independent. H1: The sex of the respondent and the choice for the cause of global warming are dependent.

Data for a certain community show that 18​% of the adult residents are German. Suppose 74 people are called for jury duty and only 12 of them are German. Does this apparent underrepresentation of Germans call into question the fairness of the jury selection​ system? Explain.   Write appropriate hypotheses.   H0​: ▼  p not equals 18 %p≠18% p equals 18 %p=18% p greater than 18 %p>18% p less than 18 %p<18% HA​: ▼  p equals 18 %p=18% p not equals 18 %p≠18% p greater than 18 %p>18% p less than 18 %p<18%   The test statistic is z=_______________ ​(Round to two decimal places as​ needed.)   The​ P-value is _____________________ ​(Round to three decimal places as​ needed.)   State your conclusion assuming a​ P-value smaller than 0.05 is significant.

Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time​ (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.

Hypothesis Test: Perform the specified hypothesis test. Be sure to include your statistical andin-context conclusion statements. In 1994, 52% of parents with children in high school felt it was a serious problem that high schoolstudents were not being taught enough math and science. A recent survey found that 512 of 1000 parentswith children in high school felt it was a serious problem that high school students were not being taughtenough math and science. Do parents feel different today than they did in 1994? Use the α = 0.005significance level.

Does the type of instruction in a college statistics class (either lecture or self-paced) influence students’ performance, as measured by the number of quizzes successfully completed during the semester? Twelve students were recruited for the study. Students received the lecture instruction or a self-paced instruction. The total number of quizzes completed during teach type of instruction appear below.

You intend to conduct a test of independence for a contingency table with 6 categories in the column variable and 6 categories in the row variable. You collect data from 838 subjects. What are the degrees of freedom for the x distribution for this test? d.f. = Submit Question

10.If the p-value _____ level of significance (α), then _________ the null hypothesis H0. A.≤; reject B.≤; do not reject C.None of the choices D.≥; accept

unrest and violence on one southern campus had descreased by 62% from 10 years ago. four out of ten americans rush their teeth daily. which of the following is true regarding these two statements? A. these statements are derived from inductive statistics B. all of the given statements are sample parameters rather than population statistics C. statistics, from one of its definitions, constitutes a collection of such statements D. these types of statements are usually found to be examples of lying with statistics E. none of these is correct

K A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 298 people over the age of 55, 69 dream in black and white, and among 310 people under the age of 25, 15 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. this 2 W S x H nd a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and alternative hypotheses for the hypothesis test? OA. Ho: P₁2P2 H₁: P₁ P2 OD. Ho: P1 P2 H₁: P₁ = P2 Identify the test statistic. Z= View an example (Round to two decimal places as needed.) 35 E D с Get more help. NOV 20 R F V ▲ % S T G B stv OB. Ho: P1 SP2 H₁: P₁ P2 OE. Ho: P1 P2 H₁: P₁ P2 MacBook Air Y H SA JA N www J # 00 8…