2. In a Calif. study, Dean Lester Breslow and Dr. James Enstrom of the UCLA School of Public Health concluded that by following 7 simple health rules a man's life can be extended by 11 years on the average, and a women's life by 7 years. The 7 rules are: 1. no smoking 2. regular exercise 3. use alcohol moderately 4. get 7 to 8 hours of sleep nightly 5. maintain proper weight 6. eat breakfast 7. do not eat between meals In how many ways can a person adopt exactly FIVE of these rules IF : a) the person presently violates all 7 rules?? b) the person already never drinks and always eats breakfast

2. In a Calif. study, Dean Lester Breslow and Dr. James Enstrom of the UCLA School of Public Health concluded that by following 7 simple health rules a man's life can be extended by 11 years on the average, and a women's life by 7 years. The 7 rules are: 1. no smoking 2. regular exercise 3. use alcohol moderately 4. get 7 to 8 hours of sleep nightly 5. maintain proper weight 6. eat breakfast 7. do not eat between meals In how many ways can a person adopt exactly FIVE of these rules IF : a) the person presently violates all 7 rules?? b) the person already never drinks and always eats breakfast

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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3) The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What kind of test will you need to perform? A right, one-tailed z-test A left, one-tailed z-test A two-tailed z- test
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Jillian Michaels and Bob Harper are all- time famous American trainers. Michaels thinks that her clients lose more weight on average than the clients of Harper. Harper naturally disagrees with Michaels. In order to settle the dispute, the two trainers agree to each work with 15 different clients for six months. The table below summarizes the weight loss (Ibs) of each group: J. В. Michaels Harper Mean 25 21 SD 5.1 2.5 Size 15 15 1. Assume normality in the population distribution, construct a 90% confidence interval for the population difference of the mean weight loss using the critical value of 1.76 (Note: all values are given, no R codes needed) 2. What does it mean to be at "90% confident"? Would the 95% confidence interval be wider or narrower? Would the margin of error be wider or narrower? (Note: no calculation is needed) 3. According to the confidence interval you found in part (a), what can be concluded about Michaels' claim? (Note: you do NOT need to do the 5-step significance…
6. Accidents on highways are one of the main causes of death or injury in developing countries and the weather conditions have an impact on the rates of death and injury. In foggy, rainy, and sunny conditions, 1/4, 1/8, and 1/21 of the accidents result in death, respectively. Sunny conditions occur 60% of the time, while rainy and foggy conditions each occur 20% of the time. Given that an accident without deaths occurred, what is the conditional probability that it was foggy at the time?
The average time that Italy commute to work is 23.15 minutes (Best 4 Tourist Places, June 15, 2020). The average commute times in minutes for 18 cities are given in Table 3.1. Table 3.1 City Time (minutes) Rome 24.9 Milan 26.8 Naples 26.2 Turin 28.1 Palermo 31.7 Genoa 25.8 Bologna 23.3 Florence 32.1 Bari 28.5 Catania 24.4 Verona 29.3 Venice 24.8 Messina 38.1 Padua 28.3 Trieste 28.4 Taranto 24.6 Prato 20.1 Modena 23.4 a) What is the variance and standard deviation of commute times for these 18 cities? b) Find the z – score value of commute time for these 18 cities. c) Find 28th and 77th Percentile of commute times for these 18 cities.
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According to the following bar graph, hydroelectric and nuclear power combined account for of all energy sources. 6.0 Oil - 38% 5.0 Coal 4.0 26% Gas 23% 3.0 2.0 Hydroelectric 6% Nuclear 01% Geothermal, Solar, Wind, and Wood 6% 1.0 0.0 12 % 38 % 1% 49 %
2) The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What is the P^? (round to nearest thousandth)