We wish to survey students at community college campuses to find out what percent of them prefer taking online classes. We want 95% confidence, and we want the sample percentage to be within 5 percentage points of the population percentage. How large a sample do we need? Round up to the nearest integer (for example, 92.15 would be rounded up to 93).
We wish to survey students at community college campuses to find out what percent of them prefer taking online classes....
We want to estimate the mean weekly earnings of students at a particular college with 95% confidence. How many students must be randomly selected so that the sample mean is within $1 of the population mean? Population standard deviation is known to be $10.
We wish to estimate (with 95% confidence) what percent of students take the bus to school. We survey a random sample of 850 students and get the following results: 70 students take the bus, 770 students do not take the bus and 10 students did not respond We should use: 2-SampTInt TInterval 2-PropZInt ZInterval 1-PropZInt 2-SampZInt
1. A popular claim, nicknamed "feshman fifteen," states that many college students gain weight point) in their freshman year. You are given the 95% confidence interval as 559% <P < 78 4% Correctly interpret the interval. There is a 95% chance tha the true percentage of college freshmen who gain weight is between 559% and 78 496. 95% of sample college freshmen who gain weight will fall between 55.9% and 78 4% We are confident that 95% of college freshmen,who...
conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and we recorded each student's age, final average, gender, # hours worked per week, race, and t attended this semester). Use the results from the following table to answer all parts of #2. he attendance record (# of classes not Age 20 18 19 Final Average Gender # Hrs...
PLEASE ANSWER ALL OF THEM PLEASE . If we wish to decrease the width of a confidence interval, we may do which one of the following: Change standard deviation of the sample a) b) Reduce size of the population. c) Increase the level of confidence. d) Collect more data. In six test runs, a truck operated 7, 10, 6, 8, 8, and 9 miles with one gallon of gasoline. At the 98% level of confidence, is this sufficient evidence to...
A group of business administration students want to conduct a survey in Caguas to find out the demand from residents for vegetarian food. One of the first steps in a pilot study is to estimate the percentage of residents who like vegetarian food. In a previous study it was estimated that the proportion of residents who like vegetarian food is 0.46. To estimate a 95% confidence interval for the proportion of residents who like vegetarian food with no greater than...
What type of classes do students want to enroll in? That was the question that I wanted to find answers too. I wanted to determine if there was a difference in the class type preference (Live, Online, and Hybrid - which is part live/part online) of students who would be taking the class. I randomly sampled 150 Stat I students and asked them which format they would prefer for their Stats Il class when they took the class. The results...
can i get help answering these questions please i do not understand how to solve them im having trouble please. Question Hop The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 90% confident that his estimate is within seven percentage points of the true population percentage? Complete...
The Student Recreation Center wanted to determine what sort of physical activity was preferred by students. In a survey of 95 students, 62 indicated that they preferred outdoor exercise over exercising in a gym. When estimating the proportion of all students at the university who prefer outdoor exercise with 99% confidence, what is the margin of error? Question 4 options: 1) 0.1260 2) 0.0062 3) 0.0489 4) 0.0129 5) 0.1138 Question 5 (1 point) Suppose you work for a pharmaceutical...
Page 1 of 3 1Chapter 10 Quiz1.What is your favorite color? A large survey of countries, including the United States,China, Russia, France, Turkey, Kenya, and others, indicate that most people prefer the colorblue. In fact, about 24% of the population claim blue as their favorite color (Reference: Study byJ. Bunge and A. Freeman-Gallant, Statistics Center, Cornell University). Suppose a randomsample of 56 college students were surveyed and 12 of them said that blue is their favoritecolor. Does this information imply...