|An experiment was conducted to study the life (in hours) of two different brands of batteries in three different brands of batteries in three different devices (radio, camera, and portable DVD player). A completely randomized two-factor experiment was conducted and the following data resulted. Device Brand of Battery Radio Camera DVD Player 8.6 7.9 5.4 8.2 8.4 5.7 Everbluey 8.3 8.3 5.6 8.4 8.1 5.3 9.4 8.5 5.8 8.8 8.9 5.9 Muracell 8.7 9 5.7 9.2 8.4 5.8 Analyze the data and draw conclusions. Use alpha = 0.05 Which brand of battery would you recommend using? 00| 00| 00

|An experiment was conducted to study the life (in hours) of two different brands of batteries in three different brands of batteries in three different devices (radio, camera, and portable DVD player). A completely randomized two-factor experiment was conducted and the following data resulted. Device Brand of Battery Radio Camera DVD Player 8.6 7.9 5.4 8.2 8.4 5.7 Everbluey 8.3 8.3 5.6 8.4 8.1 5.3 9.4 8.5 5.8 8.8 8.9 5.9 Muracell 8.7 9 5.7 9.2 8.4 5.8 Analyze the data and draw conclusions. Use alpha = 0.05 Which brand of battery would you recommend using? 00| 00| 00

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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What is meant by the sample space of an experiment?
What is an experiment?
An experiment was conducted to study the life (in hours) of two different brands of batteries in threedifferent devices (radio, camera, and portable DVD player). A completely randomized two-factorexperiment was conducted, and the following data resulted.Brand Deviceof Battery Radio Camera DVD PlayerA 8.6 7.9 5.48.2 8.4 5.7B 9.4 8.5 5.88.8 8.9 5.9(a) Analyze the data and draw conclusions, using α = 0.05. (b) Investigate model adequacy by plotting the residuals. (c) Which brand of batteries would you recommend?
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Patients immobilized for a substantial amount of time can develop deep vein thrombosis (DVT), a blood clot in a leg or pelvis vein. DVT can have serious adverse health effects and can be difficult to diagnose. On its website, drug manufacturer Pfizer reports the outcome of a study looking at the effectiveness of the drug Fragmin (dalteparin) in preventing DVT in immobilized patients. Of the 1518 randomly chosen immobilized patients given Fragmin, 42 experienced a complication from DVT. Of the 1473 randomly chosen immobilized patients given a placebo, 73 experienced a complication from DVT. Compute the proportion (risk) of patients experiencing DVT complications for immobilized patients treated with Fragmin. (Enter the proportion with 4 decimal places. DO NOT enter the percent.)
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Late Night Eating It is well-known that lack of sleep impairs concentration and alertness, and this might be due partly to late night food consumption. A study74 took 44 people aged 21 to 50 and gave them unlimited access to food and drink during the day, but allowed them only 4 hours of sleep per night for three consecutive nights. On the fourth night, all participants again had to stay up until 4 am, but this time participants were randomized into two groups; one group was only given access to water from 10 pm until their bedtime at 4 am while the other group still had unlimited access to food and drink for all hours. The group forced to fast from 10 pm on performed significantly better on tests of reaction time and had fewer attention lapses than the group with access to late night food. What are the explanatory and response variables? Is this an observational study or a randomized experiment? Can we conclude that eating late at night worsens some of the typical effects of sleep…
Bicycle frames can be made from carbon, steel, or othermaterials. Carbon frames are much more expensive thansteel, but they are also much lighter. Could this lighter frame have a significant impact on speed? In 2010 a doc-tor in England, who commutes daily to work 27 miles roundtrip on a bicycle, ran his own randomized experi-ment to investigate. Each day for several months Dr. Groves flipped a coin todetermine whether he would ride his steel frame bicycle orhis carbon frame bicycle to work and back. He rode a totalof 30 journeys on the steel frame bike and 26 journeys onhis carbon frame bicycle, recording his total commutingtime for each day. The summary statistics are shown below:a) Why would you prefer to see the actual data beforeproceeding with inference?b) Construct and interpret a 95% confidence interval forthe difference in average commuting times.c) Explain in this context what “95% confidence”means.d) Based on your confidence interval, do the doctor’sdata provide evidence…