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a recent issue of the aaRP Bulletin reported that the average weekly pay for a woman
with a high school school degree is $520 (aaRP Bulletin, January–february, 2010). Suppose you would like to determine if the average weekly pay for all working women is
significantly greater than that for women with a high school degree. data providing the
weekly pay for a sample of 50 working women are available in the file named weeklyPay.
these data are consistent with the findings reported in the aarP article.
a. State the hypotheses that should be used to test whether the mean weekly pay for
all women is significantly greater than the mean weekly pay for women with a high
school degree.
b. use the data in the file named weeklyPay to compute the sample mean, the test statistic, and the p-value
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- Sledding Injuries: Every year, about 20,000 children and teenagers visit the emergency room with injuries sustained from snow sledding. The type injuries include: fractures – 5,200; cuts and bruises – 4,900; strains and sprains – 3,200; traumatic brain injury – 1,800; and other injuries – 4,600. Create a frequency table of these data. In a paragraph introduce the table, discuss at a minimum of two factors (descriptive statements) and provide a concluding statement addressing the sledding injuries that should be addressed first. [Note: here count does not = 20,000]arrow_forwardThe Centers for Disease Control and Prevention Office on Smoking and Health (OSH) is the lead federal agency responsible for comprehensive tobacco prevention and control. OSH was established in 1965 to reduce the death and disease caused by tobacco use and exposure to secondhand smoke. One of the many responsibilities of the OSH is to collect data on tobacco use. The following data show the percentage of U.S. adults who were users of tobacco for a recent 11-year period (http://www.cdc.gov/tobacco/data_statistics/tables/trends/cig_smoking/index.htm). Year Percentage of Adults Who Smoke 1 23 2 21.6 3 20.9 4 20.2 5 20.2 6 19 7 19.3 8 20.4 9 20.4 10 19.5 11 18.9 Based on the above information: Use simple linear regression analysis to find the parameters for the line that minimizes MSE for this time series. Do not round your interim computations and round your final answers to three decimal places. For subtractive…arrow_forwardPLEASE ANSWER ALL THE PARTS OF THE QUESTION ( THIS IS NOT A GRADED ASSIGNMENT )arrow_forward
- The report “Undergraduate Students and Credit Cards in 2004: An Analysis of Usage Rates and Trends” (Nellie Mae, May 2005) estimated that 21% of undergraduates with credit cards pay them off each month and that the average outstanding balance on undergraduates’ credit cards is $2169. These estimates were based on an online survey that was sent to 1260 students. Responses were received from 132 of these students. Is it reasonable to generalize the reported estimates to the population of all undergraduate students? Address two possible sources of bias, and name the bias in your answer.arrow_forwardConsumer Research, Inc., is an independent agency that conducts research on consumer attitudes and behaviors for a variety of firms. In one study, a client asked for an investigation of consumer characteristics that can be used to predict the amount charged by credit card users. Data were collected on annual income, household size, and annual credit card charges for a sample of 50 consumers. The following data are contained in the file named Consumer. Use methods of descriptive statistics to summarize the data. Comment on the findings. Develop estimated regression equations, first using annual income as the independent variable and then using household size as the independent variable. Which variable is the better predictor of annual credit card charges? Discuss your findings. Develop an estimated regression equation with annual income and household size as the independent variables. Test the significance of the overall model at 95% confidence. Write your hypothesis. Test the…arrow_forwardFrom the Research Question below please provide a list of semi-structured questions to be used in conducting an questionnaire. What are the perceptions of public servants of the recruitment, selection and retention policies and practices in the public service of Monserrat?arrow_forward
- The Wilcox & Keselman (2003) article from this week’s electronic readings discusses two problems with measures of central tendency: skewness of the data and outliers. Discuss each of these issues and how they affect measures of central tendency.arrow_forwardThe report “Undergraduate Students and Credit Cards in 2004: An Analysis of Usage Rates and Trends” (Nellie Mae, May 2005) estimated that 21% of undergraduates with credit cards pay them off each month and that the average outstanding balance on undergraduates’ credit cards is $2169. These estimates were based on an online survey that was sent to 1260 students. Responses were received from 132 of these students. Is it reasonable to generalize the reported estimates to the population of all undergraduate students? Address two possible sources of bias, and name the bias in your answer.arrow_forwardThe National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth‑grade students. Scores on the test range from 00 to 500500 . Demonstrating the ability to use the mean to solve a problem is an example of the skills and knowledge associated with performance at the Basic level. An example of the knowledge and skills associated with the Proficient level is being able to read and interpret a stem‑and‑leaf plot. In 2015, 136,900136,900 eighth‑graders were in the NAEP sample for the mathematics test. The mean mathematics score was ?¯=282x¯=282 . We want to estimate the mean score ?μ in the population of all eighth‑graders. Consider the NAEP sample as an SRS from a Normal population with standard deviation ?=110σ=110 . (a) If we take many samples, the sample mean ?¯x¯ varies from sample to sample according to a Normal distribution with mean equal to the unknown mean score ?μ in the population. What is the standard deviation of this sampling distribution? (Enter…arrow_forward
- It is claimed that the average number of vehicles using the GB's Parking Lot each day is 244 vehicles. A student taking up Statistics recorded the number of vehicles using the parking lot over a two-week period. A table of the number of vehicles are shown below. 230 244 233 240 249 238 247 235 243 248 235 254 250 249 Do the collected data present sufficient evidence to indicate that the average number of vehicles using the GB's Parking Lot is different from 244 vehicles? Use 0.05 level of significance and assume that the population is normal. cs Scanned with CamScannerarrow_forwardSuppose you are conducting a study about how the average U.S. worker spends time over the course of a workday. You are interested in how much time workers spend per day on personal calls, e-mails, and social networking websites, as well as how much time they spend socializing with coworkers versus actually working. The most recent census provides data for the entire population of U.S. workers on variables such as travel time to work, time spent at work, and break time at work. The census, however, does not include data on the variables you are interested in, so you obtain a random sample of 82 full-time workers in the United States and ask about personal calls, e-mails, and so forth. You are curious about how your sample compares with the census, so you also ask the workers the same questions about work that are asked in the census. Suppose the mean break time per day from the most recent census is 29.6 minutes, with a standard deviation of 16.0 minutes. Your sample of 82 U.S. workers…arrow_forwardMost people think London, England is one of the rainiest cities in the world. However, it receives less rain than both Brussels and Zurich, which are two other cities in Europe. The amount of average rainfall in each of the cities is found in the data table below. Average Rainfall (mm) Jan Feb MarAprMayJun Jul AugSepOctNov DecTotal Brussels71 53 73 54 70 78 69 64 63 68 79 79 820 London 42 36 40 40 45 47 35 54 51 61 58 48 558 Zurich 67 70 69 87 103 12411713392 69 82 73 1086 How much rainfall difference is there in an average year between London and Zurich? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.arrow_forward
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
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