According to a survey in a country, 31% of adults do not own a credit card. Suppose a simple random sample of 400 adults is obtained. Complete parts (a)through (d) below.(a) Describe the sampling distribution of p, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of thesampling distribution of p below.O A. Not normal because ns0.05N and np(1 - p) < 10O B. Approximately normal because ns0.05N and np(1 - p) 2 10OC. Approximately normal because ns0.05N and np(1 - p) < 10O D. Not normal because ns0.05N and np(1 - p) 2 10Determine the mean of the sampling distribution of p.|(Round to two decimal places as needed.)HaDetermine the standard deviation of the sampling distribution of p.(Round to three decimal places as needed.) (b) What is the probability that in a random sample of 400 adults, more than 35% do not own a credit card?The probability is |(Round to four decimal places as needed.)Interpret this probability.| to result in more than 35% not owning a credit card.If 100 different random samples of 400 adults were obtained, one would expect(Round to the nearest integer as needed.)(c) What is the probability that in a random sample of 400 adults, between 30% and 35% do not own a credit card?The probability is(Round to four decimal places as needed.)Interpret this probability.If 100 different random samples of 400 adults were obtained, one would expectto result in between 30% and 35% not owning a credit card.(Round to the nearest integer as needed.)

Answered: According to a survey in a country, 31%…

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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Consider the following random sample of data: -7, 5, -1, -1, 8, 1, 7, -4, 8, 80 a) What is the mean of the sample data? Round your response to at least 2 decimal places. Number b) If the outlier is removed, what is the mean of the remaining sample data? Round your response to at least 2 decimal places. Number
5.50 Watching live television. A survey of 442 people aged 18 to 29 revealed that 30% watch live television every day.25 You take a random sample of 20 undergraduates from your university and ask them whether they watch live TV every day. If their rate matches the 30% rate: a. What is the distribution of the number of students who say they watch live television every day? b. What is the distribution of the number of students who say that they do not watch live television every day? c. What is the probability that no more than 2 of the 20 students in your sample say that they watch live television every day?
One cable company advertises that it has excellent customer service. In fact, the company advertises that a technician will be there within 30 minutes of when a service call is placed. One frustrated customer believes this is not the truth, claiming that it takes over 30 minutes for the cable repairman to arrive. The customer asks 15 of his neighbors how long it has taken for the cable repairman to arrive when they have called for him. The sample mean for this group is 32.2 minutes with a sample standard deviation of 3.6 minutes. Test the customer’s claim at the 0.02 level of significance. (a) State the null and alternative hypotheses (b) Find the value of your test statistic. Draw a picture and label its location on the normal curve. Also shade the area where you will find the p-value. (c) Calculate the p-value from the sample data. Compare it to the significance level. Label it’s value and location on your bell curve (d) Write a full…
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