A video game company studied the time teens spent playing video games each night by surveying 1,500 teenagers. The mean time spentplaying games was 115 minutes, with a standard deviation of 11 minutes. Which would decrease the margin of error for this study?(Note: margin of error a 2Vnwhere s is the sample standard deviation and n is the sample size.)A. changing the sample size from 1,500 teenagers to 1,250 teenagersB. changing the sample size from 1,500 teenagers to 1,750 teenagersC. changing the population to include ages 13 to 29D. changing the population to include ages 13 to 16

Name: A video game company studied the time teens spent playing video games
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A video game company studied the time teens spent playing video games each night by surveying 1,500 teenagers. The mean time spentplaying games was 115 minutes, with a standard deviation of 11 minutes. Which would decrease the margin of error for th

When the size of the sample is increased then the value of margin of error is decreased because sample size is in the denominator of the margin of error formula.In the given scenario, if the sample size is increased to 1,750 from 1,500 the value of margin of error is decreased. Correct answer: Option B. Changing the sample size from 1,500 teenagers to 1,750 teenagers

Math

Statistics

A video game company studied the time teens spent playing video games each night by surveying 1,500 teenagers. The mean time spent playing games was 115 minutes, with a standard deviation of 11 minutes. Which would decrease the margin of error for this study? (Note: margin of error = 2 where s is the sample standard deviation and n is the sample size.) O A. changing the sample size from 1,500 teenagers to 1,250 teenagers O B. changing the sample size from 1,500 teenagers to 1,750 teenagers C. changing the population to include ages 13 to 29 O D. changing the population to include ages 13 to 16

A video game company studied the time teens spent playing video games each night by surveying 1,500 teenagers. The mean time spent playing games was 115 minutes, with a standard deviation of 11 minutes. Which would decrease the margin of error for this study? (Note: margin of error = 2 where s is the sample standard deviation and n is the sample size.) O A. changing the sample size from 1,500 teenagers to 1,250 teenagers O B. changing the sample size from 1,500 teenagers to 1,750 teenagers C. changing the population to include ages 13 to 29 O D. changing the population to include ages 13 to 16

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A sandwich shop claims to sell subsandwiches that are 12 inches lona. An employee is alittle suspicious about this claim So over the course of the next week, he measures 45sandwiches at random. The mean and standard deviation for the 45 sandwiches is 12 18 inches
Six different second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic readings (in mmHg) are listed below. Find the range, variance, and standard deviation for the given sample data. If the subject's blood pressure remains constant and the medical students correctly apply the same measurement technique, what should be the value of the standard deviation?
The amount of money raised by Clayton State teams for the Statistics Games is normally distributed, with a mean of $360 and a standard deviation of $15. We want to determine what proportion of the teams raise less than $396. What is the z-score for the data value?
An insurance company is looking over accident statistics. They want to estimate the standard deviation and variance of the age of the driver involved in an automobile accident. They record the age of the driver for a random selection of 100 accidents from around the country. Would it be more appropriate to find a sample standard deviation or population standard deviation in this situation? Select the correct answer below: A. sample standard deviation B. population standard deviation
A group of customer service surveys were sent out at random. The scores were 40, 70,80, 00, 50, 40, 40, 70, 80, 00, and 50. Find the range, variance, and standard deviation
The average McDonald's restaurant generates $3 million in sales each year with a standard deviation of 0.4. Russell wants to know if the average sales generated by McDonald's restaurants in Nebraska is different than the worldwide average. He surveys 26 restaurants in Nebraska and finds the following data (in millions of dollars):3.3, 3.2, 3.5, 3.3, 3.3, 3.4, 2.8, 3.5, 3.4, 2.5, 2.5, 3.6, 2.9, 2.9, 2.9, 3.5, 3.4, 2.7, 2.2, 2.5, 3.5, 3.6, 3.5, 3.7, 3.6, 2.8Perform a hypothesis test using a 10% level of significance.Step 1: State the null and alternative hypotheses.H0:(p or u)(<,> #)? Ha: p or u)(<,> #)? (So we will be performing a left or right or 2 tail test.)?Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem.By the Central Limit Theorem, we know that the point estimates are normal distributed or t distributed ? with distribution mean ? and distribution…
A large corporation employs 21,995 individuals. The average income of all employees is $64,372, with a standard deviation of $18,985 and is skewed to the right. Consider this to be the population distribution. You are given a data set consisting of the incomes of 180 randomly selected employees. What is the population standard deviation?
An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for each of the four crashes was $414 , $453 , $405 , $240 . Compute the range, sample variance, and sample standard deviation cost of repair.
Salaries for teachers in a particular elementary school district are normally distributed with a mean of $47,000 and a standard deviation of $4,600. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.)a. Find the 90th percentile for an individual teacher's salary b. Find the 90th percentile for the average teacher's salary.
You are applying for a job at two companies. Company A offers starting salaries with u = $33,000 and o = $1,000. Company B offers starting salaries with u = $33,000 and o = $3,000. From which company are you more likely to get an offer of $35,000 or more? Choose the correct answer below. O A. Company A, because data values that lie more than two standard deviations from the mean are considered unusual. O B. No difference, because data values that lie more than three standard deviations from the mean are considered very unusual. O C. Company B, because data values that lie within one standard deviation from the mean are not considered unusual.
Consider the following data: −9,13,−14,−14,−9,−14,−9−9,13,−14,−14,−9,−14,−9 Copy Data Step 2 of 3: Calculate the value of the sample standard deviation. Round your answer to one decimal place.
The average McDonald's restaurant generates $3.6 million in sales each year with a standard deviation of 0.9. Trent wants to know if the average sales generated by McDonald's restaurants in Kentucky is different than the worldwide average. He surveys 27 restaurants in Kentucky and finds the following data (in millions of dollars): 4.1, 2.8, 4.4, 4.5, 5.3, 5, 3.7, 2.9, 3.8, 4.8, 3.6, 2.3, 3.7, 2.9, 2.9, 4, 1.1, 5.2, 2.9, 5, 4, 4, 5.9, 3.2, 2.2, 4.3, 3.8 Perform a hypothesis test using a 3% level of significance. Step 1: State the null and alternative hypotheses. Ho: [? v] ? v На: ? ? v (So we will be performing a Select an answer test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are Select an answer v with distribution mean and distribution standard deviation Step 3: Find the p-value of the point estimate. P( ? v ? v = P( ? ♥ ?…