Which survey is likely to give a more accurate view of working "women's opinions on job satisfaction, pay, benefits, and opportunities for advancement"? Is this im likely to be the result of lower bias or smaller sampling variability? Explain briefly proved accuracy 5. Regular Gallup Poll interviews taken daily for an entire year examined the issue of the difference in the health of American adults aged 18 to 64 who have healt who do not (they were not interested in those 65 and older since they would be eligible for health care through the Medicare program). Altogether, 199,672 respondents were interviewed as of this investigation including about 160,000 who had health insurance and 40,000 who did not. It turned out that 57% of those with health insurance rated their own health as "excellent" or "very good" compared with only 36% of those without health insurance. For results based on the sample of those with no health insurance, the Gallup report indicated 95% confidence that the margin of sampling error was + 1 percentage point. h insurance versus those a. For this report what is The population of interest? An example of a parameter of interest? The sample? An example of a statistic? b. The report gives results for all 18-64 year old adults interviewed as well as separately for the insured and non-insured groups who responded. If Gallup had reported the margin of error for the sample percentage of all adu excellent or very good it would be lt respondents who said their own health was C. still 1% as reported for the uninsured sample. A. less than 1%. B. greater than 1%. Pick one and explain briefly.

A sales analyst wants to determine whether there is a difference in the mean monthly sales of a company's four sales regions. Several salespersons from each region are randomly selected and they provide their sales amount (in thousands of dollars) for the previous month. Using a 5% significance, can we conclude at least one region is different on average? Region Sales North North North North East East East East East South South South South West West West West West 21 36 33 28 28 35 31 35 39 12 22 7 27 23 30 27 31 39 What is the factor variable? [Select an answer What is the response variable? [Select an answer Test Statistic: P-Value: Decision Rule: Select an answer Did Something Significant Happen? Select an answer There Select an answer to conclude Select an answer

A standardized exam consists of three parts: math, writing, and critical reading. Sample data showing the math and writing scores for a sample of 12 students who took the exam follow. Student Math Writing 1 540 474 2 432 380 3 528 457 4 574 612 5 448 420 6 502 520 7 480 430 8 499 459 9 610 615 10 572 535 11 390 329 12 593 613   Use a 0.05 level of significance and test for a difference between the population mean for the math scores and the population mean for the writing scores. (Use math score − writing score.)   1. Calculate the test statistic. (Round your answer to three decimal places.)   2. Calculate the p-value. (Round your answer to four decimal places.) p-value =

A researcher groups college student in a study based on their year in college (freshman, sophomore, junior, senior) and the type of college they attend (junior, technical, university). He concludes that perceptions of academic cheating are more positive among freshman attending junior college. To reach this conclusion, which statistical test would need to be computed?

Anterior cruciate ligament (ACL) injuries occur most frequently in planting and cutting sports such as basketball, soccer, and volleyball.  A sports medicine researcher wants to test if female athletes are more likely to have an ACL injury than males.  He surveyed 50 collegiate programs that had both men’s and woman’s volleyball and asked them how many grade 3 ACL tears they had during the past season.  Which statistical test would be best to determine if there is a significant difference between groups?

What is the primary use of the One - Way ANOVA model? a. To compare variance of groups b. To test linearity of group mean c. To compare group means d. To test variance of the overall mean

Students in a statistics class were asked, “About how many minutes do you typically exercise in aweek?” Responses from the men in the class were “180, 300, 60, 480, 0, 90, 300, 14, 600, 360, 120, 0,240”(a) Create a five-number summary of the men’s responses.(b) Identify any potential outliers.

A magazine reports that women trust recommendations from a particular social networking site more than recommendations from any other social network platform. But does trust in this social networking site differ by gender? The following sample data show the number of women and men who stated in a recent sample that they trust recommendations made on this particular social networking site.   Women Men Sample 150 170 Trust RecommendationsMade on the social networking site 117 102 (a) What is the point estimate of the proportion of women who trust recommendations made on this particular social networking site?   (b) What is the point estimate of the proportion of men who trust recommendations made on this particular social networking site?   (c) Provide a 95% confidence interval estimate of the difference between the proportion of women and men who trust recommendations made on this particular social networking site. (Round your answers to four decimal places.)  to

The owner of Maumee Ford-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.  Car Age (years) Selling Price ($000) 1 11 12.1 2 8 10.5 3 14 5.7 4 17 4.9 5 9 5.0 6 8 13.4 7 10 10.5 8 14 9.0 9 13 9.0 10 17 4.5 11 6 12.5 12 6 11.5   Click here for the Excel Data Filea. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) a= b=   Estimate the selling price of an 7-year-old car (in $000). (Round your answer to 3 decimal places.) Interpret the regression equation (in dollars). (Round your answer to the nearest dollar amount.)

Anterior cruciate ligament (ACL) injuries occur most frequently in planting and cutting sports such aa basketball, soccer, and volleyball. A sports medicine researcher wants to test if female athletes are more likely to have an ACL injury than males. He surveyed 50 collegiate programs that had both men's and woman's volleyball and asked them how many grade 3 ACL tears they had during the past season. Which statistical test would be best to determine if there is a significant diffence between groups? One sample t test  Dependent samples t test Independent samples t test ANOVA