EsA census of all the 12,475 current students at the local community college showed that 56.5% want to transfer to a university, their average age is 21.7 years,and 60 of them are pursuing degrees in mathematics. In order to attract more students, the math department organized an "Opportunities in Mathematics" fairfor current students of the college. A total of 267 students from those who attended responded to a poll. The poll showed that 83% of those who answered wantto transfer to a university, the average poll respondent was 22.3 years old, and 77them were interested in pursuing a degree in mathematics.(a) For the math fair poll, identify the population and the sample.Population: (Choose one)Sample: (Choose one)(b) Choose whether each number described below is a parameter or a statistic for the math fair poll.NumberParameterStatisticThe 60 students pursuing a math degree among all the current students at the communitycollegeThe 56.5% of all current students at the community college who want to transfer to a universityThe average age of 22.3 years of the students who responded to the pollO O

Answered: A census of all the 12,475 current…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A hearing specialist conducts a study on hearing loss at certain frequencies among a group of patients in a retirement community. Of 94 residents tested, 10 had significant hearing loss at low frequencies but not high, 40 had a significant loss at high frequencies but not low, and 26 showed no significant hearing loss at all. How many residents had hearing loss at both low and high frequencies?
Last year 46% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicated that 35% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners. How many business owners in the survey plan to provide a holiday gift to their employees this year?
in a survey of 14 college students, it was found that 9 were taking an English class, 7 were taking a math class, and 6 were taking both English and math. How many students were taking a math class only? How many students were taking an English class only? How many students were taking neither.
For its “Music 360" survey, Nielsen Co. asked teenagers and adults how each group has listened to music in the past 12 months. Nearly two- thirds of U.S. teenagers under the age of 18 say they use Google Inc's video-sharing site to listen to music and 35% of the teenagers said they use Pandora Media Inc's custom online radio service (The Wall Street Journal, August 14, 2012). Suppose 10 teenagers are selected randomly to be interviewed about how they listen to music. Answer questions 7- 10.
There are 64% of US adults who own a smartphone, up from 35% in 2011. Smartphones have become an important way for Americans to communicate, go online, access and share information. The Pew Research Center surveyed 1635 people in November, 2014 on smartphone ownership. Their goal was to learn how Americans use their smartphone devices. Identify the population and the sample.
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Among college students, the proportion p who say they’re interested in their congressional district’s election results has traditionally been 75% . After a series of debates on campuses, a political scientist claims that the proportion of college students who say they’re interested in their district’s election results is more than 75% . A poll is commissioned, and 207 out of a random sample of 275 college students say they’re interested in their district’s election results. Is there enough evidence to support the political scientist's claim at the 0.01 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round…
People often match their behavior to their social environment. One study of this idea first established that the type of music most preferred by black college students is R&B and that white college students' most preferred music is rock. Will students hosting a small group of other students choose music that matches the makeup of the people attending? Assign 9090 black business students at random to three equal‑sized groups. Do the same for 9696 white students. Each student sees a picture of the people he or she will host. Group 1 sees six blacks, Group 2 sees three whites and three blacks, and Group 3 sees six whites. Ask how likely the host is to play the type of music preferred by the other race. Use ANOVA to compare the three groups to see whether the racial mix of the gathering affects the choice of music.
An opinion poll contacts 1021 adults and asks them, which political party do you think has better ideas for leading the country in the twenty first century? In all, 723 of the 1021 day, the democrats. The sample in the setting is? (a) all 220 million adults in the U.S. (b) the 1022 people interviewed (c) the 723 people who chose the democrats.
for its Music 360 survey, Nielsen Co. asked teenagers and adults how each group has listenedto music in the past 12 months. Nearly two-thirds of U.S. teenagers under the age of 18 say theyuse google Inc.’s video-sharing site to listen to music and 35% of the teenagers said they usePandora Media Inc.’s custom online radio service (the wall street Journal, August 14, 2012).Suppose 10 teenagers are selected randomly to be interviewed about how they listen to music.a. Is randomly selecting 10 teenagers and asking whether or not they use Pandora MediaInc.’s online service a binomial experiment?b. what is the probability that none of the 10 teenagers use Pandora Media Inc.’s onlineradio service?
A statistics teacher asked two different students, Lexie and Jennifer, to go to Wegmans and sample 30 shoppers each. The population of interest for both people can be defined as, “People who shop at the Johnson City, NY Wegmans store”. Here is what each person did to collect their sample: Lexie: She stood outside at the entrance to the store on 3 different days and times and surveyed every 15th person to walk by her. She surveyed 10 people each time to get her 30. Jennifer: She went to Wegmans after her nursing shift first thing Wednesday morning to buy deodorant since she ran out. When she was in the pharmacy area she surveyed all the people around her and then, to get up to 30 surveys, she went to the health food section and surveyed everyone she was there. Identify at least 2 specific reasons why Lexie’s approach is more likely to give a representative sample. Consider sources of bias, or types of shoppers who might be excluded by Jennifer’s approach.…
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