What do you value most when shopping in a retail store? According to a survey, 26% of consumers value personalized experience most. Complete parts (a) through (d) below.....a. Suppose that the survey had a sample size of n= 800. Construct a 95% confidence interval estimate for the population proportion of consumers that value personalized experience most when shopping in a retail store?(Pound to four cdecimal places as needed )

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Example: You would like to construct a 90% confidence interval for the proportion of graduating seniors that go directly on to graduate school. You randomly sample 386 graduating seniors and find that 73 will be enrolling in graduate school in the upcoming semester. 1. What is your point estimate? 2. Construct a 90% confidence interval for the true proportion of graduating seniors that go directly on to graduate school? 3.How many graduating seniors will you have to sample to have a margin of error within 2%?
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n a survey of 3422 adults aged 57 through 85 years, it was found that 82.7% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3422 subjects used at least one prescription medication? nothing (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. nothing%less thanpless than nothing% (Round to one decimal place as needed.)
B. Identify the value of the margin of error E C. Construct the confidence interval There are 3 part to this question. Other two questions are above.
Symbol Company Price ($) Yield AT&T 33.59 5.48% VZ Verizon 46.78 4.70% CVX Chevron 112.18 3.82% MCD McDonald's 93.70 3.63% PFE Pfizer 31.15 3.60% GE General Electric 25.27 3.48% MRK Merck 56.79 3.17% САТ Caterpillar 91.53 3.06% Хом ExxonMobil 92.45 2.99% ко Соса-Cola 42.22 2.89% If you selected two of these stocks at random, what is the probability that both the stocks in your selection had yields of 3.25% or more? (Enter your probability as a fraction.) Enter a fraction, integer, or exact decimal. Do not approximate.
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
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Report an appropriate hypothesis test for a positive linear relationship and use a 5% significance level. Explain the potential error in words, in context. In the answer options below I have used the phrase “a certain relationship” because I don’t want to give away exactly what type of relationship it is. Group of answer choices We would be accepting that there was a certain relationship between Sale amount and Tip when actually there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when indeed there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when actually there was. We would be accepting that there was a certain relationship between Sale amount and Tip when indeed there was.
See the graph of data below to answer the following question Obtain a 95% confidence interval for the difference between the mean rates of return. Interpret the interval.
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Online News In a Harris poll of 2036 adults, 40% said that they prefer to get their news online. Construct a 95% confidence interval estimate of the percentage of all adults who say that they prefer to get their news online. Can we safely say that fewer than 50% of adults prefer to get their news online?

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