01:43:37City planners plan to survey residents to estimate the proportion of city residents who use public transportation atleast once a week. Which of the following methods describes a voluntary response survey?O City planners stand outside an office building and survey workers.O City planners hand out surveys to parents at a youth soccer game.O City planners take a random sample of local homes and survey the residents.City planners email a survey to all residents in the community.Mark this and returnSave and ExitNextSubmit71°

Given problem Given that City planners plan to survey residents to estimate the proportion of…

Answered: City planners plan to survey residents…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter6: Ratio, Proportion, And Probability

Section6.1: Ratios And Rates

Problem 46E

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Conditional probability If 40 of the population have completed college, and 85 of college graduates are registered to vote, what percent of the population are both college graduates and registered voters?
There are 435 seats in a nation's House of Representatives. The number of representatives per state is calculated using a statistical formula determined by law, but allocation is roughly proportionate to population. In 2010, the nation's population was estimated to be 309.1 million. The state's population was estimated at 26.1 million. How many representatives would you expect to be assigned to the state? Suppose the state actually has 34 representatives. Compare this with the expected number of representatives from the state.
Meteorologists in Texas want to increase the amount of rain delivered by thunderheads by seeding the clouds. Without seeding, thunderheads produce, on average, 300 acre feet. The meteorologists randomly selected 30 clouds which they seeded with silver iodide to test their theory that average acre feet of rain produced is more than 300. Which of the following is the most appropriate test for this data? a. One Sample t Test b. Sign Test c. One Proportion Z Test
A summer program to decrease liter was carried out in 4 cities. Below we look at litter rates in June 2011 and September 2011. The amount of litter is presented below. June September 9 2 10 4 8 9 9 1 A, What is SMd? B, What is negative tcrit for an α=0.01? C, What is tobs?
As part of a sixth-grade class project the teacher brings to class a jar containing 200 gumballs of two different colors: red and green. Andy is asked to draw a sample of his own choosing and estimate the number of red gumballs in the jar. Andy draws a sample of 25 gumballs, of which 8 are red and 17 are green. Use Andy's sample to estimate the number of red gumballs in the jar. There are approximately Answer red gumballs in the jar.
Determine what proportion (n) of a population N of 4,000 will make your research work scientific in terms of sampling? Use the Slovin's formula at 0.05 level of significance. Give the solution.
Trucks are required to pass through a weighing station so that they can be checked for weight violations. Trucks arrive at the station at the rate of 40 an hour between 7:00 p.m. and 9:00 p.m. Currently two inspectors are on duty during those hours, each of whom can inspect 25 trucks an hour.a. How many trucks would you expect to see at the weighing station, including those being inspected? b. If a truck was just arriving at the station, about how many minutes could the driver expect to be at the station? c. What is the probability that both inspectors would be busy at the same time? f. What is the maximum line length for a probability of 0.97?
1. an In February, Oregon had 400 thousand people attempt to register for vaccinations, but there were only 34 hundred appointment slots. What percent of the people registering received an appointment? Round to the nearest tenth of a percent b. Recently, according to Oregon Health & Science University, which operates the scheduling website and the drive-thru at the airport, the website can accommodate 4,800 users at a time and 11,000 users were online trying to book appointments at 9:01 am. Round to the nearest tenth of a percent. c. Are these two examples calculating the same thing? Explain.
Rafael Nadal, a profossional tennis player believes he can make 70% of his first serves that are at least 110 mph. His friends believe the percentage should be smaller than 70% They challenged Ralato do 400 first-serves. Rafa successfully served 255 tinesThe null hypothesis is that he can serve 70% of his first servesa) Find the observed percentage and the standard error for percentage. Round the standard error to the nearest tenth of a porcent(for example 6.3%6). Hint The SD for the box model isb) Compute the z-stalistic. Round your answer to two decimal placesc) Find te p value Round your answer to the nearest tenth of a percentifor example 6.3%)d) if the significance level is set at 5% do you reject the nulf hypothesis? What about 1%?
Rafael Nadal, a profossional tennis player believes he can make 70% of his first serves that are at least 110 mph. His friends believe the percentage should be smaller than 70% They challenged Ralato do 400 first-serves. Rafa successfully served 255 tinesThe null hypothesis is that he can serve 70% of his first servesa) Find the observed percentage and the standard error for percentage. Round the standard error to the nearest tenth of a porcent(for example 6.3%6). Hint The SD for the box model is___b) Compute the z-stalistic. Round your answer to two decimal placesc) Find the p value Round your answer to the nearest tenth of a percent. For an example 6.3%.d) If the significance level is set at 5% do you reject the nulf hypothesis? What about at 1%?

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