Directions: Identify which type of sampling is used: random, stratified random, cluster, systematic, or convenience. _____________________1. A psychologist selects 5 boys and 5 girls from each of Special Science classes. _____________________2. When he made an important announcement, he based conclusion on 5,000 responses from 50,000 questionnaires to students. _____________________3. The game show organizer writes the name of each contestant on a separate card, shuffles the cards, and draws 6 names. _____________________4. Globe selects every 50th cellphone from the assembly line an conduct a thorough test of quality

Directions: Identify which type of sampling is used: random, stratified random, cluster, systematic, or convenience. ___________1. A psychologist selects 5 boys and 5 girls from each of Special Science classes. _2. When he made an important announcement, he based conclusion on 5,000 responses from 50,000 questionnaires to students. _3. The game show organizer writes the name of each contestant on a separate card, shuffles the cards, and draws 6 names. ___________4. Globe selects every 50th cellphone from the assembly line an conduct a thorough test of quality

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 you want to be 90% confident that the sample percentage is within 2.5 percentage points of the true population percentage. Completed 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 suggest that about 35% of air passengers prefer an aisle seat. N=____ (round up to the nearest integer)
Complete parts (a) through (e) for the population data below. 2, 4, 6 d. For each of the possible sample sizes, find the probability that the sample mean will equal the population mean. n Probability 1 1 3 2 3 3 1 (Type integers or simplified fractions.) e. For each of the possible sample sizes, find the probability that the sampling error made in estimating the population mean by the sample mean will be 0.5 or less (in magnitude), that is, that the absolute value of the difference between the sample mean and the population mean is at most 0.5. n 1 2 3 Probability (Type integers or simplified fractions.)
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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 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.) nter corr
Lesson 10 Q4 The number of accidents in a week is ___________? A.a continuous random variable. B.a discrete random variable. C.neither continuous nor discrete variable. D.continuous and discrete variables.
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Answers only. Thank you An instructor recorded the following number of correct items (in a quiz with 10 questions) for the 12 students present: 7, 4, 2, 2, 2, 9, 10, 6, 7, 3, 8, 5. What is the level of measurement of the data obtained?* a. Ordinal b. Ratio c. Interval d. Nominal 2. The purpose of stratified random sampling is to make certain that* a. the sample is more representative of the target population than the accessible population. b. the participants chosen for the study are the ones most likely to react to the treatment. c. every member of the population has an equal chance of being selected for the sample. d. the sample proportionately represents individuals from different categories of the population 3. In a simple random sample, a. each member in the population has a chance of being included in the sample. b. not all members in the population are given the chance of being selected. c. each…