Need help with D and E please 2. A company that sells thousands of bicycles online maintains a telephone help line to assist customerswho are assembling their bicycle. The company keeps detailed records of the percentage of customerswho purchase a bicycle who call in for help. The company claims that 18% of all customers whopurchase a bicycle call the help line.a. Let the proportion of customers in a sample who call the help line. Calculate the mean andstandard deviation of the sampling distribution of p for random samples of size 150 from thispopulation.SD = 0.314n=150p=18%mean = 0.18SD == √(p *g/n)=9-1-0.18-0.82b. Interpret the standard deviation from part (a).On average, there is a 0.0314 difference betweenSample proportion and the mean(0,18 0,82/150) = 0.314c. Would it be appropriate to use a normal distribution to model the sampling distribution of p?Justify your answer.np=150*0.18=27ng=180° 0.82=123np = 27>10d. In an effort to reduce costs, the assembly instructions were rewritten with fewer pages. Thecompany selects an SRS of 150 purchasers who received the new instructions. What is theprobability that at least 25% of the customers in the sample call the help line?ng=123710 Sampling distribution followsnormale. The company finds that 25% of the customers in the sample called the help line. Based on youranswer to part (d), do these data provide convincing evidence that the proportion of customerswho would call the help line when given the new assembly instructions has increased from 0.18?Explain your reasoning.

d. In an effort to reduce costs, the assembly instructions were rewritten with fewer pages. The company selects an SRS of 150 purchasers who received the new instructions. What is the probability that at least 25% of the customers in the sample call the help line? normal e. The company finds that 25% of the customers in the sample called the help line. Based on your answer to part (d), do these data provide convincing evidence that the proportion of customers who would call the help line when given the new assembly instructions has increased from 0.18? Explain your reasoning.

d. In an effort to reduce costs, the assembly instructions were rewritten with fewer pages. The company selects an SRS of 150 purchasers who received the new instructions. What is the probability that at least 25% of the customers in the sample call the help line? normal e. The company finds that 25% of the customers in the sample called the help line. Based on your answer to part (d), do these data provide convincing evidence that the proportion of customers who would call the help line when given the new assembly instructions has increased from 0.18? Explain your reasoning.

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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