An airline’s data indicate that 50 percent of people who begin the online process of booking a flight never complete the process and pay for the flight. To reduce this percentage, the airline is considering changing its website so that the entire booking process, including flight and seat selection and payment, can be done on two simple pages rather than the current four pages. A random sample of 300 customers who begin the booking process are exposed to the new system, and 117 of them do not complete the process. Formulate the null and alterative hypotheses needed to attempt to provide evidence that the new system has reduced the non-completion percentage. Use the critical value approach to test the hypotheses by setting α equal to 0.10, 0.05, 0.01 and 0.001. Use the p-value approach to test the hypotheses by setting α equal to 0.10, 0.05, 0.01 and 0.001.

A campus researcher wanted to investigate the factors that affect visitor travel time in a complex, multilevel building on campus. Specifically, he wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. How should the data be analyzed? Wall Signs Map Starting Room Interior 141, 119, 238 85, 94, 126 Randomized block design O Completely randomized design 2 x 2 factorial design Levene's test Exterior 224, 339, 139 226, 129, 130

Opinions are split about a coffee​ company's pumpkin-flavored coffee​ (PFC). Yet every year over the last five years the consumption of​ pumpkin-flavored goods has increased. If we look at the​ numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a​ magazine, the amount spent by PFC buyers at the coffee company is about​ 17% higher than​ non-PFC buyers. The accompanying table shows a random sample of eight​ consumers, the amount they spend per​ week, and the number of PFCs purchased per week.     PFC Spending     2 13.88     7 39.11     4 19.79     1 9.84     3 15.43     1 21.52     5 37.39     3 13.85   Calculate the slope and​ y-intercept for the regression formula.   The slope is b1=​(Round to three decimal places as​ needed.)

There are​ 64% of US adults who own a​ smartphone, up from​ 35% in 2011. Smartphones have become an important way for Americans to​ communicate, go​ online, access and share information. The Pew Research Center surveyed 1635 people in​ November, 2014 on smartphone ownership. Their goal was to learn how Americans use their smartphone devices.   Identify the population and the sample.

Frq styled response

Opinions are split about a coffee​ company's pumpkin-flavored coffee​ (PFC). Yet every year over the last five years the consumption of​ pumpkin-flavored goods has increased. If we look at the​ numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a​ magazine, the amount spent by PFC buyers at the coffee company is about​ 17% higher than​ non-PFC buyers. The accompanying table shows a random sample of eight​ consumers, the amount they spend per​ week, and the number of PFCs purchased per week. PFC Spending     2 13.88     7 39.11     4 19.79     1 9.84     3 15.43     1 21.52     5 37.39     3 13.85   The slope is b1=4.465 The​ y-intercept is b0=6.840   Because the slope is positive, it can be concluded that one extra PFC purchase per week will increase the average amount of spending per week by 4.46 dollars.     Predict…

Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food "to go"), so it can make decisions regarding the possible construction of in-store play areas, the attendance of its mascot Sammy at the franchise locations, and so on. Anita's reports that 45% of its customers order their food to go. If this proportion is correct, what is the probability that, in a random sample of 5 customers at Anita's, exactly 3 order their food to go?

In a class, 96% students have at least one smartphone, 98% have a calculator, and 95% have a calculator and at least one smartphone. What percentage of students in the class have neither a calculator nor a smartphone?

Based on market sales figures, approximately 7.9% of car owners in California own an electric or plug-in hybrid vehicle (EV). A marketing director at a local car dealership would like to know if their sales of EV's is any greater than what the state's sales proportions are. To examine this, they look over the last 500 sales (which they consider to be a representative sample of all car sales) and determine that 10.4% of those were EV sales. Is this statistically significant evidence that the dealership sells a higher proportion of EV's than the overall state's proportion? Which of the following are the correct null and alternative hypotheses for the hypothesis test used to determine significance? Ho:p = 0.079 Haip > 0.079 %3D O Ho:p = 0.079 Hai p > 0.104 O Ho:p 0.079 O Ho:p 0.104