A student surveys some students on campus in the evening and finds that 16 out of...

A student surveys some students on campus in the evening and finds that 16 out of 20 of the students she interviewed are part time students. She uses the data to estimate the percentage of all students who are part time. What type of bias is present in her sample?

Expert Solution

milcah answered 1 year ago

In order to find out the probability that a student will bring a car to campus,...

In order to find out the probability that a student will bring a car to campus, 100 students are polled. Of those students, 85 have cars to bring to campus. a) Find a point estimate for the proportion of students who will bring a car to campus. b) For the 95% confidence level, find zc, the critical value for the given confidence level. c) For the 95% confidence level, find the error, E, for the confidence interval (round your answer...

Based on the limited amount of available student parking spaces on the GSU campus, students are...

Based on the limited amount of available student parking spaces on the GSU campus, students are being encouraged to ride their bikes (when appropriate). The administration conducted a survey to determine the proportion of students who ride a bike to campus. Of the 123 students surveyed 5 rides a bike to campus. Which of the following is a reason the administration should not calculate a confidence interval to estimate the proportion of all students who ride a bike to campus?...

Suppose a student carrying a flu virus returns to an isolated college campus of 1000 students.

Suppose a student carrying a flu virus returns to an isolated college campus of 1000 students. Determine a differential equation governing the number of students x(t) who have contracted the flu if the rate at which the disease spreads is proportional to the number of interactions between the number of students with the flu and the number of students who have not yet been exposed to it

The student academic group on a college campus claims that freshman students study at least 2.5...

The student academic group on a college campus claims that freshman students study at least 2.5 hours per day, on average. One Introduction to Statistics class was skeptical. The class took a random sample of 30 freshman students and found a mean study time of 137 minutes with a standard deviation of 45 minutes. At α = 0.01 level, is the student academic group’s claim correct? Calculate the p-value.

A student conducts a simple random sample of students from her high school and finds that...

A student conducts a simple random sample of students from her high school and finds that 21 out of 100 students in her sample regularly walk to school. Give a point estimate for the proportion of all students at her high school who regularly walk to school. For each combination of sample size and sample proportion, find the approximate margin of error for the 95% confidence level. (Round the answers to three decimal places.) In a sample of 16 students,...

Angeline, a bright college student finds out that the iPhone 8 was just launched this past...

Angeline, a bright college student finds out that the iPhone 8 was just launched this past week in Cupertino, CA. She along with the thousands of consumers plans on purchasing the iPhone 8 from Best Buy due to a price decrease from $899.99 to $649.99. Apple expects to see the quantity demanded for iPhone 8 to rise from 2 million to 3 million by the end of the year. What is the iPhone 8’s elasticity of demand?

Some five courses are offered on campus in a semester. The group of students who take...

Some five courses are offered on campus in a semester. The group of students who take at least one of these courses consists of 155 students. There are 80 students registered in each course. For any two among these courses, there are precisely 40 students who take both of them. For any three of these courses, there are precisely 20 students who take all three of them. For any four among these courses, there are precisely 10 students who take...

A campus student club distributed material about membership to new students attending an orientation meeting. Of...

A campus student club distributed material about membership to new students attending an orientation meeting. Of those receiving this material, 35% were men and 65% were women. Subsequently, it was found that 8% of the men and 11% of the women who received this material joined the club. Complete parts a and b below. a. Find the probability that a randomly chosen new student who receives the membership material will join the club. nothing (Round to four decimal places as...

1. A botanist surveys a forest for disease and finds that 15 of the 230 white...

1. A botanist surveys a forest for disease and finds that 15 of the 230 white pines sampled have blister rust. Find a 99% confidence interval on the true proportion of white pines with blister rust within the forest. Describe with an English sentence that uses the lower and upper bounds of the confidence interval mean. 2. Suppose the botanist wants to estimate the true proportion of white pines with blister rust to within 1% of the sampled proportion. Still...

Part I: Sampling Your college wants to gather student opinions about parking for students on campus....

Part I: Sampling Your college wants to gather student opinions about parking for students on campus. It is not practical to contact all the students. For this assignment, complete the following items: Design a bad sample. In a short paragraph, design how you would create a sample of students to answer your survey on parking. This should be an example of a bad sample design. Design a good sample. Do the same as above, but discuss a sample design...

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