Computers in Schools Elementary and secondary schools were classified by the number of computers they had.Computers 1-10 11-20 21-50 51-100 100+Schools 3453 2411 17,231 24,223 35,685Send data to Excel4RChoose one school at random. Find the probabilities of the following. Enter your answers as fractions or decimals rounded to 3decimal places.Part 1 of 3da(a) 100 or fewer computersP (100 or fewer computers) = Part 2 of 3(b) More than 50 computersP (more than 50 computers) -Part 3 of 3(c) No more than 20 computersP (no more than 20 computers) -Check AnswerSave For LaterSubmit Assignment

The following information has been given: Computers 1-10 11-20 21-50 51-100 100+ School 3453…

Answered: Computers in Schools Elementary and…

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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Bird species 2010 The Cornell Lab of Ornithologyholds an annual Christmas Bird Count (www.birdsource.org), in which bird watchers at various locations aroundthe country see how many different species of birds theycan spot. Here are some of the counts reported fromsites in Texas during the 2010 event:150 216 177 150 166 156 159 160 164 169 175150 178 183 199 154 164 203 158 231a) Create a stem-and-leaf display of these data.b) Write a brief description of the distribution. Be sureto discuss the overall shape as well as any unusualfeatures.
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30% of students take Physics 101 and 20% take Math146. Of the students who take Physics 101, 25% also take Math146. If a student is chosen at random find P( student takes Physics101 and Math146) O a. 0.3 O b. 0.2 O c. 0.25 O d. 0.83 One 0.075
3899 you're a data analyst for an insurance company. You want to make sure that your employer is not over-paying for car repairs. To investigate this, you bring 38 different cars to two different garages, Bubba's Hubcap Heaven and Repair, and Merle's Motor Shop. Some of the cars need lots of repairs. Some of the cars need very few. By taking each car to both shops, we can directly compare the two sets of prices. Before running your analysis, be sure to look at the data file and verify that each car requires a different amount of repairs, and that prices in one shop are correlated with prices at the other shop. That is, they're in the same ballpark. The question is whether one tends to charge more, on average, than the other. Your task is to use Excel to test the research hypothesis that prices are different in the two shops; the null hypothesis is that prices are equal between the two shops. You test at the alpha = 0.01 significance level. What do you conclude? Are prices the same?…
Critical Thinking. For Exercises 5-20, watch out for these little buggers. Each of these exercises involves some feature that is somewhat tricky. Find the (a) mean, (b) median, (c) mode, (d) midrange, and then answer the given question. 5. Football Player Numbers Listed below are the jersey numbers of 11 players randomly selected from the roster of the Seattle Seahawks when they won Super Bowl XLVIII. What do the results tell us? 89 91 55 7 20 99 25 81 19 82 60
Letter grades on a Statistics 101 test from a class consisting of 200 students are presented in the pie chart below: C 22% D 15% C. F 4% A 23% B 36% a. How many students received a "D"? b. If a "C" or better is required to take Statistics 102, how many students in this class will be eligible to take that course? If 62.5% of those that received a "B" are international students, how many domestic students also got a "B"? d. If the top 110 students are exempted from a bonus quiz, what is the minimum grade of those exempted?
Each person in a representative sample of 449 college students age 18 to 24 was classified according to age and to the response to the following question: "How often have you used a credit card to buy items knowing you wouldn't have money to pay the bill when it arrived?" Possible responses were never, rarely, sometimes, or frequently. The responses are summarized in the table. Age 18 to 20 Age 21 to 22 Age 23 to 24 Never 73 62 29 Rarely 38 34 32 Sometimes 30 42 40 Frequently 13 24 A USE SALT Do these data provide evidence that there is an association between age group and the response to the question? Test the relevant hypotheses using a = 0.01. State the appropriate null and alternative hypotheses. O H: The proportions falling into each of the three age groups are not the same for all four responses to the question. H: The proportions falling into each of the three age groups are the same for all four responses to the question. O Hg: The proportions falling into each of the three age…
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