A stats class was interested in determining the percentage of students on their campus who are opposed to a new policy eliminating all paper books from the campus bookstore in favor of eBooks. After surveying 90 students, the class finds that 33% are opposed to the policy. 1.Calculate the margin of error for this survey. Round the percentage to one decimal place.

Q: Find the percentage of data points that lie between -2.31 and 1.85.

A: Assuming the data follows standard normal distribution with mean 0 and standard Deviation 1Finding…

Q: A survey was conducted to find if modern young people want to have many children. 453 young men were…

A: The margin of error formula is given as follows,  z = 1.96 using z-table as 95% confidence interval…

Q: 110 students at a college were asked whether they had completed their required English 101 course,…

A: It is given that 110 students at a college where 69 students said that they had completed their…

Q: n Internet poll asked 4272 U.S. adults about their use of smart watches and fitness trackers. A…

A: Given:

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: 104 concert-goers at the Glass House in Pomona, California were asked if they know how to play an…

A: Here it is given that- Number of concert goers  = 104 Number of concert goers who can play an…

Q: 103 students at a college were asked whether they had completed their required English 101 course,…

A: It is given that, 103 students at a college were asked whether they had completed their required…

Q: A consumer group surveyed 146 airplane travelers after a flight and found that 132 of them would fly…

A:

Q: One day, a poll appeared on a certain website. It asked "Do you believe that rain can soothe the…

A: we wants to calculate the margin of error . let us consider level of significance =0.05 this is one…

Q: The following boxplot illustrates the song length (in seconds) of the top 50 songs on Spotify in…

A: The median is the middlemost value of the dataset. So here Median corresponds to the one that lies…

Q: When 500 junior college students were surveyed,120 said that they have previously owned a…

A: When 500 junior college students were surveyed,120 said that they have previously owned a…

Q: 114 students at a college were asked whether they had completed their required English 101 course,…

A: 114 students at a college were asked whether they had completed their required English 101 course,…

Q: In a recent study, 46% of people enjoy country music.  If 200 people are surveyed about their…

A: Given : Proportion (prop.) of people enjoy country music p = 46% = 0.46 Sample size of people n =…

Q: A survey was conducted to find if modern young people want to have many children. 479 young men were…

A: Margin of error is calculated by the critical value and standard error of the sample. The formula…

Q: A survey was conducted to find if modern young people want to have many children. 832 young men were…

A: 39% of 832 young men want to have more than one child that is about 324 people answered "Yes".

Q: When 445 junior college students were​ surveyed, 135 said that they have previously owned a…

A:

Q: If a coin is flipped 150 times and the number of Hs is 25. Compute the proportion of Hs. Round to…

A: We have given that,  Favorable cases (X) = 25 and sample size (n) = 150 Then,  We will find the…

Q: Choose the correct answer below. O A. All the values within the margin of error are less than 50%. O…

A: Given:- The sample size (n = 1100) is large enough to compute the point estimate of the proportion…

Q: estimate the proportion of tenth graders reading at or below the eighth grade level. Ente

A: It is given thatThe total number of tenth graders =1265The number of students read above the eighth…

Q: A quality-conscious disk manufacturer wishes to knoww the fraction of disks his company makes which…

A: Given, The no. of sample, n =5431 The number of defective, x = 4943

Q: Suppose that the results of a survey show that  24%  of people consider summer as their favorite…

A: Solution: From the given information, p=0.24 and E=0.02.

Q: Fear of the dark is quite common among children. However, what about adults? One polling agency…

A: We have given that n = 452 p = 34% = 0.34 When no confidence level given then by default we assume…

Q: 130 students at a college were asked whether they had completed their required English 101 course,…

A:

Q: A survey of 250 households showed 71 owned at least one snow blower. Find a point estimate for p,…

A: Solution-: X=71, n=250 We want to find the point estimate of p?

Q: If 80% of Mars rovers land in former streambeds and 65% of the rovers in streambeds on Mars find…

A: Solution-: Let, S-Mars rovers land in former streambeds        W- historic evidence of water Given:…

Q: To the nearest whole number, what percent of respondents did not choose Dominos or Marcos as their…

A: Given that: The frequency of each respondent's favorite pizza shop is recorded and shown in the…

Q: This question is not on any test. The table below shows the approximate number of people for three…

A: Given data, Race/Armed Suspect was Armed Suspect was unarmed Total Percent killed that were…

Q: 138 students at a college were asked whether they had completed their required English 101 course,…

A: Consider that p is the true proportion of students at the college who have completed their required…

Q: find smaple coeffcient of variation   4.1,4.2,.2,4.3,4.4,4.4,4.5,4.7,4.9

A:

Q: Find the best point estimate for the proportion of students at the college who have completed their…

A: A point estimate is defined as the single value that is calculated from the sample data to estimate…

Q: A group of researchers want to investigate the academic performance of the college students in…

A: Given that, N = 12000 Margin of error (e) = 0.05 The formula for calculating the sample size is,

Q: 81 students at a college were asked whether they had completed their required English 101 course,…

A: The number of students said yes (x) is 54 and the sample size (n) is 81.

Q: 136 students at a college were asked whether they had completed their required English 101 course,…

A: The total no.of college students is, n = 136 The no.of students who have completed their required…

Q: Heal the Bay is an environmental organization that releases an annual beach report card based on…

A: A dot plot is the pictorial representation of the data values. It is drawn to observe the pattern of…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.