According to previous studies, 10% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handedpeople in the U.S. is 12%.The student is going to take a random sample of 900 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handedpeople in the sample.Answer the following. (If necessary, consult a list of formulas.)(a) Find the mean of p.(b) Find the standard deviation of p.(c) Compute an approximation for P (p ≥0.12), which is the probability that there will be 12% or more left-handed peoplein the sample. Round your answer to four decimal places.G

Given information: The true population proportion is p=0.10. The sample proportion is denoted by p^.…

Answered: According to previous studies, 10% of…

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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In a study of 1050 adults, 175 out of the 650 women in the study said that they prefered driving an SUV to driving a compact car. What is the approximate percentage of study participants that are wormen who prefer driving a compact car? O 61.9% O 26.9% O 45.2% O 73.1%
Could you please help answer letter a?
What is the variable of interest? Whether or not a patient is satisfied with the level of care. Whether or not all the patients like the doctor. The sample proportion of patients satisfied with the service Whether or not a patient likes the doctor. The number of patients that are satisfied with the servise
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The null and alternative hypotheses are statements made about A. population parameters.B. sample parameters.C. sample statistics.D. either A or C.
Steele Electronics Inc. sells expensive brands of stereo equipment in several shopping malls. The marketing research department of Steele reports that 33% of the customers entering the store that indicate they are browsing will, in the end, make a purchase. Let the last 23 customers who enter the store be a sample. a. How many of these customers would you expect to make a purchase? (Round the final answer to the nearest whole number.) Number of customer......... b. What is the probability that exactly five of these customers make a purchase? (Round the final answer to 4 decimal places.) c. What is the probability 13 or more make a purchase? (Round the final answer to 4 decimal places.) d. Does it seem likely at least one will make a purchase ("likely" refers if the probability is more than 70%)? Yes or No
See the attached picture/file for the questions
A survey is conducted from a population of people of whom 40% have a college degree. The following sample data were recorded for a question asked of each person sampled, "Do you have a college degree?" Complete parts a and b. No Yes No Yes No No Yes No No No Yes No No No No Yes No No Yes No No Yes No No a. Calculate the sample proportion of respondents who have a college degree. The sample proportion of respondents who have a college degree is (Type an integer or a decimal.) 22: No No Yes No No Yes
Answer the following questions accordingly. Take your time. Thanks in advance!
Read the study below carefully. Then answer the questions that follow by typing in the letter of the correct response. Rhianna hears that watching ASMR videos on YouTube can help with insomnia. She conducts a sleep study on 60 people who have difficulty sleeping by asking a simple random sample of 30 participants to watch at least 20 minutes of ASMR videos prior to sleeping and the remaining 30 participants to attempt to sleep without watching any videos. During the study, the subjects are connected to an EEG machine, which is used to measure brain activity. Rhianna analyzes the EEG results and concludes that those who watched the ASMR videos experienced a better quality of sleep than those who did not. i. Identify the treatments in Rhianna’s study. A. being connected to an EEG machine B. experiencing difficulty sleeping C. watching at least 20 minutes of ASMR videos D. watching at least 20 minutes of non-ASMR videos E. watching no videos prior to sleep F. all…
The heights (in centimeters) of some randomly selected Men's World Cup soccer players from both Europe and the U.S. are given below. Europe 169 170 171 175 175 175 178 180 181 182 184 185 185 187 189 United States 167 168 169 173 176 176 178 180 180 181 183 183 186 187 187 Is there a difference between the heights of European and American soccer players? What is the test statistic for this test? 0.7399 0.3352 0.3700 0.6648 0.2601
A standardized test has a scale that ranges from 3 to 45. A new type of review course for the test was developed by a training company. The accompanying table shows the scores for nine students before and after taking the review course. Complete parts (a) through (d) below. E Click the icon to view the data table. a. Perform a hypothesis test using a= 0.05 to determine if the average test score is higher for the students after the review course when compared with before the course. Let p, be the population mean of matched-pair differences for the score before the course minus the score after the course. State the null and alternative hypotheses. Choose the correct answer below. O A. Ho: Ha = 0 H,: Ha #0 O B. Ho: Ha 20 H,: Hg 0 H,: Ha s0 O D. Ho: Ha s0 H,: Hg>0 OF. Ho: Ha <0 H,: Hg 20 Test Scores O E. Ho: Ha #0 H,: H = 0 Student Before After 26 28 b. Calculate the appropriate test statistic and interpret the results of the hypothesis test using a = 0.05. 23 25 18 16 The test statistic…

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