### LED Lifespan Expectation Calculation**Problem Statement:**Suppose that a small company purchases 300 of these 75-watt LEDs with a guarantee that 97% of them will last for more than 25,000 hours. Assuming the guarantee is correct, what is the expected number of them that will last for more than 25,000 hours?#### Options:- 270- 288- 291- 280#### Solution:To calculate the expected number of LEDs that will last more than 25,000 hours, you can simply compute 97% of 300.\[\text{Expected Number} = 300 \times 0.97 = 291\]Therefore, the correct answer is **291**.---### Relationships Between Smoking and Cancer**Instructions:**Use the information below to answer questions 24 through 27.Researchers are interested in possible relationships between smoking and cancer. The following two-way table shows the results of data taken for a total of 2500 randomly sampled adults (smokers who are 60 years old or older) who are categorized as Heavy Smoker, Moderate Smoker, or Light Smoker, where the three types of cancers...(Note: The table that contains data for the description above is not visible in the image provided. Please refer to the original document or source for the complete data table.)

From the given information we find the expected number of bulbs will last more than 25000 hours

Answered: Suppose that a small company purchases…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In 1980 the population of aligators in a particular region was esi mated to be 1600 In 2008 the population had grown to an estimated 5000 Using the Maltiusian law for population growth, estirmate the alligator population in this region in the year 2020. The alligator population in this rogion in the year 2020 is ostimated to be (Round to the nearest whole number as noeded )
12. C. How long will it A pie is removed from a 175°C oven. The room temperature is 24° take the pie to cool to 37°C (body temperature) if it cooled 60° in the first four minutes?
Each point on the Kaplan Meier curve represents: A. The number of people at risk at a given point in time. B. The cumulative probability of survival up to that point. C. The prevalence of disease at a given time point. D. The probability of survival at that time point only.
A recent study claims that 40% of registered voters associate themselves with Democrats. 35% with Republicans, 20% Independent, 3% Green party, and 2% with Social democrats. In a sample of 400 individuals, we observed 200 Democrats 150 Republicanse 25 Independente 15 Green Partye 10 Social Democrats Test the claim at a=0.05.e
for t* = - 1.29, s, = 0.51, s2 = 0.98, n, = 25, and n2 = 35. n2 Evaluate E =t* -+ - E= (Round to two decimal places as needed.)
In Utah, it is illegal for a person to drive if their blood alcohol level (BAC) is higher than 0.05. For a typical male, their liver can decrease BAC by 0.015 per hour. If a typical male has a BAC of 0.08 at 6pm and consumes no more alcohol, what is his predicted BAC at 7:30pm?When do you predict a typical male in part a. will have a BAC of 0?If Peter had a BAC of 0.08 at 7pm, do you think he will be legal to drive at exactly 9:00pm? Explain your answer in 1-2 sentences
A neuroscientist wants to know if physical exercise changes reaction speed in elderly people. A total of 14 older volunteer participants were found. One sample of n = 7 subjects received an exercise treatment, while the second sample (n = 7) of participants were given stretching lessons for the same amount of time per week. Reaction speed was tested on a computer program after six weeks of treatment. Reaction speed was measured in milliseconds. Data shown below. What is the type of statistical test you could use on these data? _____________________ Why this test? ___________________________________________________________ What is the I.V.? ___________________ What is the D.V.? ______________________ Use the data below to fill in the blanks to compute your tcalculated. stretch group exercise group nstretch = ____ dfstretch = _____ nexercise…
Draw a number line on which adjacent tick marks are 0.1 unit apart and on which 0.003 can be plotted (in its approximate location). Now show how to “zoom in” on smaller and smaller portions of the number line (see Activity 1.3- Zooming In and Out) until you have “zoomed in” to a portion of the number line in which adjacent tick marks are 0.001 apart and so that 0.003 can be plotted on each number line. Label the longer tick marks on each number line, and plot 0.003 on each number line (in its approximate location).
In a recent survey, 72% of post-secondary graduates indicated that they expected to earn at least $6000/month by the time they were ready to retire. The survey is considered accurate within ±5.2%, 19 times in 20. If the graduating class that participated in this survey contained 2100 students, what is the lower and upper estimate of the number of students who expect to earn at least $600/month by the time they are ready to retire? Select one: O a. 1403 to 1621 О Б. 19 toо 20 C. 66.8 to 77.2 O d. 95%
There are 150,000 households in Market City. A local phone repair shop takes a random sample of 50 households and finds that the average number of phones per household from the sample last year that needed to be repaired was 1.05 ± 0.23. Which of the following is an estimate of the total number of phones that needed repairing last year in Market City? O Between 82 and 128 phones O Between 123,000 and 192,000 phones Between 105 and 23 phones O Between 157,500 and 34,500 phones.

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Suppose that a small company purchases 300 of these 75-watt LEDs with a guarantee that 97% of them will last for more than 25,000 hours. Assuming the guarantee is correct, what is the expected number of them that will last for more than 25,000 hours? 270 288 O291 280