1. WHAT IF? You want to estimate the number of twelfth-grade students in a high school who ride a bus to school. Which sample is unbiased? Explain. 2. You want to estimate the number of eighth-grade students in your school who find it relaxing to listen to music. You consider two samples. • fifteen randomly selected members of the band • every fifth student whose name appears on an alphabetical list of eighth-grade students Which sample is unbiased? Explain.

1. WHAT IF? You want to estimate the number of twelfth-grade students in a high school who ride a bus to school. Which sample is unbiased? Explain. 2. You want to estimate the number of eighth-grade students in your school who find it relaxing to listen to music. You consider two samples. • fifteen randomly selected members of the band • every fifth student whose name appears on an alphabetical list of eighth-grade students Which sample is unbiased? Explain.

Name: enough to provide accurate daa.So, the correct answer is D.Try It1. W
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Description: enough to provide accurate daa.So, the correct answer is D.Try It1. WHAT IF? You want to estimate the number of twelfth-grade studentsin a high school who ride a bus to school. Which sample is unbiased?Explain.2. You want to estimate the number of e

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 99% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n= (Round up to the nearest integer.) B- Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. n = (Round up to the nearest integer.)
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 95% confident that the sample percentage is within 5.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n = (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 34% of air passengers prefer an aisle seat. n = IDound un to the nearest integer)
Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.A psychologist wants to measure the effect of music on memory. He randomly selects 80 students and measures their scores on a memory test conducted in silence. The next day he measures their scores on a similar test conducted while classical music is playing. The mean score without music is compared to the mean score with music. Group of answer choices a.quantitative, dependent b.qualitative, independent c.qualitative, dependent d.quantitative, independent
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You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 5.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. (Round up to the nearest integer.)
How is a sample related to a population? Choose the correct answer below. O A. A sample is a subset of a population. O B. A sample is a numerical measure that describes a sample characteristic. O C. A sample is the collection of all outcomes, responses, measurements, or counts.
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