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In examining the ability of users to complete a variety of information-seeking tasks on their mobile devices, Nielsen Norman Group assigned sample mem- bers to get the answers to a variety of questions like, "How many calories are there typically in a slice of thin- crust pizza?" The success rate for achieving such tasks was 75% for those using touch-screen phones like the iPhone to access the mobile Internet, compared to 80% for persons accessing websites on a conventional per- sonal computer. Assuming these percentages to be based on independent samples of 500 persons each, and using the 0.01 level of significance, can we conclude that the population success rate with a conventional PC is greater than that when using the mobile Internet and touch- screen phone? Source: "Study: Mobile Web a Throwback to ‘90s," USA Today, July 20, 2009, p. 3B.
Additionally, method of delivery of drug (patch,pill, or nasal mist) was considered. In experiment, there were how many treatments?
Camyo Manufacturing produces four parts that require the use of a lathe and a drill press. The two machines operate 10 hours a day. The following table provides the time in minutes required by each part:
1.an experiment tests the effects of new devices to help stop smoking. they tested hypnosis nicotine gum nicotine patch
an airline has classified its customers as high-volume travelers assumed to be business travelers or low-volume
Claims arrive at random times to the insurance company. Determine the probability that amount of total claims over period of 100 days is at least $150,000.
The problem related to Basic Statistics and discuss about the application of ANOVA for data analysis. A statement about longer working hours increasing fatigue in medical staff and the increase in errors has been statistically tested using ANOVA i..
a committee of 6 is to be randomly selected from a group of 8 women and 6 men.a joe and bill do not get along. what is
Identify the independent and dependent variables. Perform a regression analysis on the data.
explain the concept and application of uniform
1. An article reports the results of an analysis of salespersons' performance level as a function of two factors: task difficulty and effort. Included in the article is the following ANOVA table:
At the .05 significance level, can we conclude that there is a difference in their mean times?
there are three traffic lights between your house and a friends house. as you arrive at each light it may be red r
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