This year's statistics class was small (only 15 students)
Q: According to past reports 51% of employees own a car. In a random sample of 106 employees, how many…
A: Total no.of employees(n)= 106 The percentage of employees own a car(p)= 0.51
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Q: Explain the Two stage Least Square estimator in the general IV regression model?
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Q: Nationally, 83% of Americans have earned a high school diploma. We want to see if the proportion of…
A: We have to find sample proportion.
Q: According to past reports 48% of employees own a car. In a random sample of 250 employees, how many…
A: Total no.of employees=250 The percentage of employees own a car=0.48
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A: Given information: The output of a chisquare test for independence is given.
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A: Given,Total no.of chairs=7
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A: For a set of n observations X1, X2,...., Xn, Mean=1n∑i=1nXiStandard deviation=1n∑i=1nXi-X2The 99%…
Q: 1. In an intro stats class, students were asked to work in teams of 2 to conduct a survey their…
A: Here we need to solve 1a, 1 b only
Q: 6 of the last 10 sundaes sold had nuts. Considering this data, how many of the next 5 sundaes sold…
A: The probability that sundaes sold had nuts is, Psold sundaes have nuts=610=0.6 The probability that…
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A: It is given that Total number of students = 569 Number of boys = 272 Number of girls = 297
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A: From the given information we conduct Z test for proportion.
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Q: A school principal surveys 4 freshman, 4 sophomores, 4 juniors, and 4 seniors. For the situation…
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A: 0.3% of 100000 population have virus. 0.3*100000/100= 300 people have virus. 88% have virus and…
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A: In any research or in a survey, a population of interest is considered. While it is not possible to…
Q: A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He…
A: Given data: 1, 1, 2, 2, 2, 1, 1, 3, 2, 3, 1, 1, 1, 2, 2, 4, 4, 2, 2, 1, 1, 1, 5, 4, 3, 4, 1, 1, 1,…
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Q: At a university 60% of students take a math course, 50% take an English course. Assume Math and…
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A: Introduction A variable is a no., characteristic which can be counted or measured.
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Q: Your town does a study and finds that 3 in 5 dogs have licenses. If there are 250 dogs in town, how…
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A: Grades Popular sports Total Boy 120 67 87 274 Girl 151 121 33 305 Total 271 188 120 579
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Q: At Roxbury Community College, 7 out of every 10 students take introduction to Statistics. If there…
A: given data N = 2500 students total in college 7 out of every 10 students take introduction to…
This year's statistics class was small (only 15 students)
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- If we wanted a random sample of students in a cafeteria, why couldn't we just take the students who order coke with their lunch?The question is in the image.Several years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 62% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is. (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…
- Suppose 20% of cars are sportscars and that 30% of sportscars are red, and that 25% of all cars are red. What proportion of non-sportscars are red?On fan sites, there were discussions about whether the data show a home-field advantage: does the host team tend to perform better than the visiting teams? In order to answer this question, you dedicate some time to watching all 8 of the Marbula one races. For each race, you record TRUE if the host team finishes in the top 2, and FALSE otherwise. Remember, there are 16 teams competing in each race. In 2 of the 8 races, the host team finished in the top 2. You conduct a simulation of this experiment: 1000 sets of 8 races using the null proportion = a. (You need to determine the correct value of a). Of the 1000 simulated experiments shown below, you find that in b simulations, there are at least 2 races where the host team finished in the top 2. (You determine the value of b) Simulation results Sim mean: 0.98 n= 402 400- Sim sd: 0.93 n = 350 300 - 200- n= 177 100- n= 59 n- 12 # Races where host team finished in the top 2 Which of the following statements are correct? # SimulationsTo inspect manufacturing processes, companies typically examine samples of parts for deficiencies. One company that manufactures ballpoint pens selected samples of ,000 pens on each of 17 days. The company recorded, for each sample of 1,000, the number of defective pens in the sample. Here are their data. 1, 1, 2, 2, 2, 3, 3, 5, 5, 6, 7, 7, 10, 11, 13, 14, 18 Send data to calculator Send data to Excel Frequency 8. 6+ 2+ 2 4 12 16 20 Number of defective pens (out of 1000) O Mean (a) For these data, which measures of OMedian central tendency take more than one value? Mode Choose all that apply. None of these measures OMean (b) Suppose that the measurement 18 (the largest measurement in the data set) were OMedian replaced by 39. Which measures of central tendency would be affected by the change? OMode Explanation Check O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibility 99+ O Type here to search 2. 4.
- You are an education researcher interested in studying if race or ethnicity affects the severity of punishment children receive. Through open records, you are able to collect from several high schools the length of suspensions given to kids for fighting along with the race/ethnicity of the child. The state of Texas divides school children into one of 7 race/ethnicity groups: African American, American Indian, Asian, Hispanic, Pacific Islander, White, or Multiracial. You want to compare the average length of suspension among these 7 groups. Which statistical test would be best to determine if there is a significant difference in the severity of punishment among the different groups? one-sample t-test related samples t-test independent samples t-test ANOVASuppose the data is: 0.848, 0.413, 1.058, 0.858, 0.350, 1.582, 0.372, 0.566, 1.097, 0.939, 0.761, 0.864, 0.712, 0.264, 0.138, 1.124, 0.383, 1.194, 2.072, 0.690. Use the sign test and the Wilcoxon signed rank test to test the null hypothesis H0: median = 1 versus the alternative H1: median < 1.When you hear thw words “population” and “sample,” what comes first in your mind?
- A city official would like to know if there is public support for increasing funding for arts programs. To collect data, the city official stands outside a concert hall after a show and surveys every 25th person to exit and asks their opinion about raising funds for the arts. Which of the following describes the population in this scenario? all residents of the city the members of the city council all city residents who support the arts the people surveyed by the city officialThe Student Union President conducted a survey to estimate the proportion of first year students who participated in the social activities organized by the Student Union. Which of the following surveying options does NOT affect the presidents ability to generalize the survey to all first year students. The president put the survey on the Student Union webpage a Monday and collected the responses at the end of the week. All of the other options present a problem for generalizing the results. The president polled all students coming out of the Student Union on a given Monday. The freshmen class consists of 3000 students. A random sample of only 300 were sent a survey. Only 150 responded. The survey was sent only to first year students enrolled in statistics courses because all students need to satisfy a statistics general education requirement.Dr. A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He stands outside Petco and asks people what kind of pet they own. This is the result of his survey: dog=1; cat=2; bird=3; reptile=4; fish=5; other=6 1,1,2,2,2,1,1,3,2,3,1,1,1,2,2,4,4,2,2,1,1,1,5,4,3,4,1,1,1,2,2,6,1,1,2,2,1,2,1,2,6,3,4,5
