Business sensor technology provides a way for companies to learn about their​ customers, employees, and operations. A survey of global business and IT executives found that 28​% of automotive​ executives; 27​% of​ energy, utilities, and mining​ executives; 30​% of hospitality and leisure executives; 30​% of industrial products​ executives; and 59​% of retail and consumer executives say their companies are currently investing in business sensor technology. Suppose these results were based on 400 business and IT executives in each of the five​ industries: Automotive;​ Energy, Utilities, and​ Mining; Hospitality and​ Leisure; Industrial​ Products; and Retail and Consumer. Complete parts​ (a) through​ (b) Enter your data in the table below and then use the​ TI-84 Stat tests.   Invest in Sensor Technology Auto Execs                              Energy Execs Hospitality Execs Industrail Execs Retail Execs Totals Yes             No             Totals               At the 0.05 level of​ significance, is there evidence of a difference among the industries with respect to the proportion of executives that say their companies are currently investing in business sensor​ technology?   State the null and alternative hypotheses.   A. H0: π1=π2=π3=π4=π5=0 H1: At least one of the πj is not equal to zero (where j=1, 2, 3, 4, 5)   B. H0: π1=π2=π3=π4=π5 H1: π1≠π2≠π3≠π4≠π5   C. ​Ho: P1=P2=P3=P4=P5 ​H1: not all​ P's are equal   D. H0: π1=π2=π3=π4=π5=0 H1: π1≠π2≠π3≠π4≠π5≠0   The test statistic is χ2STAT=___. p-value=____   __A__ H0., since the p-value is less than a. There __B__ significant evidence of a difference among the industries with respect to the proportion of executives that say their companies are currently investing in business sensor technology.    A: do not reject or reject  B: is not or is    What does the​ p-value mean? Choose the correct answer below.   A. The​ p-value is the probability of rejecting the null hypothesis if the test were repeated for different samples.   B. The​ p-value is the probability of obtaining a result at least as extreme as the one obtained with this sample given that the null hypothesis is true.   C. The​ p-value is the probability of falsely rejecting the null hypothesis.   D. The​ p-value is the probability that the null hypothesis is true.

As a destination marketing director, you found that TV executives used the guideline that 25% of the viewers were watching Fox cable network, 22% watching NBC and CBS, and 19% watching ABC.  The remaining 12% were watching other cable networks such as CNN and MSNBC on a weekday night.  A random sample of 500 viewers in the D.C. metro area last Tuesday night showed 109 homes were tuned in to the Fox station, 125 homes tuning in to NBC affiliate, 100 homes tuning in to CBS affiliate and 81 homes tuning in to ABC affiliate.  85 homes were watching CNN and NSNBC cable stations.  At the 0.05 significant level, can we conclude that the guideline is still reasonable?

Practice question #3 Investigators want to know if those who work long hours have more trouble sleeping. In one sample of 190 British civil servants who worked more than 40 hours a week, 95 of them said they usually get less than 7 hours of sleep per night. In a second sample of 150 British civil servants who worked between 35 and 40 hours per week, 63 of them said they usually get less than 7 hours of sleep per night. The investigators believe these are represent samples of the populations. Find a 95% Confidence Interval for the difference in proportions of these two populations that get less than 7 hours of sleep per night. Then interpret the confidence interval. Be sure to check that any necessary conditions are met first. Round final answers to 3 decimal places. Verify conditions are appropriate for method: Interval: ________________________ Does the interval contain zero? __________ What does this information lead you to conclude?

Business sensor technology provides a way for companies to learn about their customers, employees, and operations. A survey of global business and IT executives found that 26% of automotive executives; 27% of energy, utilities, and mining executives; 31% of hospitality and leisure executives; 31% of industrial products executives; and 51% of retail and consumer executives say their companies are currently investing in business sensor technology. Suppose these results were based on 400 business and IT executives in each of the five industries: Automotive; Energy, Utilities, and Mining; Hospitality and Leisure; Industrial Products; and Retail and Consumer. Complete parts (a) through (c). a. At the 0.05 level of significance, is there evidence of a difference among the industries with respect to the proportion of executives that say their companies are currently investing in business sensor technology? State the null and alternative hypotheses. A. Ho ₁₂ ====0 H₁: At least one of the лj is…

Government economic studies reveal that young adults, not middle-aged or older adults, are having the most difficult time in today’s economy. Although the nation’s labor market shows a decline in the unemployment rate, the percentage of young adults, ages 18 to 24, currently employed (54 percent) is at the lowest level since the government data collection began in 1948. If you were working for a national survey organization doing a general public survey of young adults and older adults, what topics and questions would you design into your survey to elaborate on this finding?

Part 1: The state of Maryland's arrest rate for marijuana possession in 2010 was the fourth highest in the nation. Public records for that year show that police arrested one out of every 250 Maryland residents for possession of marijuana. In addition, while Black people only comprised 30% of the State's population in 2010, 58% of those arrested for marijuana possession were Black. Use the following labels for events describing Maryland residents in the year 2010. M-AMP: Maryland resident was arrested for marijuana possession M-B: Maryland resident was a Black person a) What is the probability that a Maryland resident was arrested for marijuana possession in 2010? b) Use probability notation to express the cited percent values. 30% = P( 58% = P( c) Which of the values cited should be compared to determine whether race and arrests for marijuana possession in the state of Maryland in 2010 are independent?

Razor LLC has a data warehouse that is used by several analytics groups. The data warehouse consists of a number of distinct components, including a cloud server (99.999% availability), a database management system server (99.4%), an analytics logic server (94.7%), and, of course, the network infrastructure to the cloud server, which has an availability of 99.9%. What is the overall availability of the system, expressed as a percentage with three digits of precision? For example, enter 91.223, but do not enter a percent symbol, i.e., do not enter 91.223%