A cellphone provider has the business objective of wanting to determine the proportion of subscribers whowould upgrade to a new cellphone with improved features if it were made available at a substantiallyreduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 123 ofthe subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable ifat least 20% of the subscribers would upgrade. Complete parts (a) and (b) below.a. At the 0.05 level of significance, is there evidence that more than 20% of the customers would upgradeto a new cellphone at a reduced cost?Determine the null hypothesis, Ho, and the alternative hypothesis, H₁ .▶ a. At the 0.05 level of significance, is there evidence that more than 20% of the customers would upgradeto a new cellphone at a reduced cost?4Determine the null hypothesis, Ho, and the alternative hypothesis, H₁.OA. Ho: ≤0.20H₁: >0.20B. Ho: #0.20H₁: = 0.20

Answered: A cellphone provider has the business…

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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C8. According to the Pew Research Center (2015), recent immigrants are better educated than earlier immigrants to the United States. The change was attributed to the availability of better education in each region or country of origin. The percentage of immigrants 25 years of age and older who completed at least high school is reported in this table for 1970 to 2013. Write a statement describing the change over time in the percentage who completed at least a high school degree. 1970 1980 1990 2000 2013 Mexico 14 17 26 30 48 Other Central/South America 57 53 60 66 Asia 75 72 75 82 84 48 68 81 87 95 Europe 36 48 52 58 72 Caribbean 81 91 88 85 85 Africa Source: Pew Research Center, Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change Through 2065, 2015. Retrieved from https://www.pewresearch.org/hispanic/2015/09/28/modern- immigration-wave-brings-59-million-to-u-s-driving-population-growth-and-change-through-2065/ 52
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Opinions are split about a coffee company's pumpkin-flavored coffee (PFC). Yet every year over the last five years the consumption of pumpkin-flavored goods has increased. If we look at the numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a magazine, the amount spent by PFC buyers at the coffee company is about 17% higher than non-PFC buyers. The accompanying table shows a random sample of eight consumers, the amount they spend per week, and the number of PFCs purchased per week. PFC Spending 2 13.88 7 39.11 4 19.79 1 9.84 3 15.43 1 21.52 5 37.39 3 13.85 Calculate the slope and y-intercept for the regression formula. The slope is b1=(Round to three decimal places as needed.)
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Step 3: Assess the Evidence (Calculate the test statistic for the observed sample mean. Sketch the T-distribution and identify the position of the observed test statistic. Shade the area that represents the P-value. Use the test statistic to find the P-value.)
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