10.DETAILSDEVORESTAT9 3.TB.020.If pn= 40 and qn = 20, then what is the shape of the binomial distribution?O normalO positively skewedO negatively skewedO cannot be determined without additional information

Answered: 10. DETAILS DEVORESTAT9 3.TB.020. If pn…

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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A student is taking a true-false exam with 10 questions. Assume that the student guesses at all 10 questions. Use the accompanying tables to complete parts a through c. Click the icon to view the binomial distribution table for p = 0.5 and n = 10. Click here to view page 1 of the normal table. Click here to view page 2 of the normal table. Click here to view page 3 of the normal table. Click here to view page 4 of the normal table. a. The student gets either seven or eight answers correct. The probability the student gets either seven or eight answers correct is. (Round to four decimal places as needed.)
A poll of 2,188 randomly selected adults showed that 90% of them own cell phones. The technology display below results from a test of the claim that 94% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test of p = 0.94 vs p *0.94 Sample X N 1 2,188 1969 Sample p 0.899909 b. What is the test statistic? a. Is the test two-tailed, left-tailed, or right-tailed? Two-tailed test Right tailed test Left-tailed test The test statistic is -7.90 . (Round to two decimal places as needed.) c. What is the P-value? 95% CI The P-value is. (Round to three decimal places as needed.) (0.887333,0.912484) Z-Value - 7.90 P-Value 0.000
5.5.17 diau A binomial experiment is given. Decide whether you can use the normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot, explain why. A survey of adults found that 419% have used a multivitamin in the past 12 months. You randomly select 50 adults and ask them if they have used a multivitamin in the past 12 months. Select the correct answer below and, if necessary, fill in the answer boxes within choice. your O A. No, because nq <5. O B. No, because np <5. O C. Yes, the mean is and the standard deviation is (Round to two decimal places as needed.) Click to select and enter your-answer(s) and then click Check Answer. All parts showing Clear All Check Answer hp
2. Suppose X is a binomial random variable with n = 5 and p = 0.5. a. Display?(?) in tabular form. b. Compute the mean and the variance of x.
Suppose samples of size 100 are drawn randomly from a population that has a mean of 20 and a standard deviation of 5. What is the probability of observing a sample mean equal to or greater than 20.5? 0.8384 0.4192 0.1634 0.9192 0.1587
Suppose there is a binomial distribution with: n=63 and p= 0.38 . Answer the questions. Round answers to 3 decimal places. What is the mean of the binomial distribution? What is the variance of the binomial distribution? What is the standard deviation of the binomial distribution?
6.3.10 Question Help Three randomly selected households are surveyed. The numbers of people in the households are 2, 7, and 12. Assume that samples of size n 2 are randomly selected with replacement from the population of 2, 7, and 12. Construct a probability distribution table that describes the sampling distribution of the proportion of even numbers when samples of sizes n 2 are randomly selected. Does the mean of the sample proportions equal the proportion of even numbers in the population? Do the sample proportions target the value of the population proportion? Does the sample proportion make a good estimator of the population proportion? Listed below are the nine possible samples. 2,2 2,7 2,12 7,2 7,7 7,12 12,2 12,7 12,12 Construct the probability distribution table. Sample Proportion Probability Type an integer or fraction.) Enter your answer in the edit fields and then click Check Answer. parts remaining Clear All Check Answer Activate Windows
In a certain normal distribution, the mean is 50. If an observation of 30 is randomly selected, the z-score for this observation will be O Positive O Not enough information to tell O 50 O Negative
15. 16. You may need to use the appropriate table in the Appendix of Tables to answer this question. DETAILS DEVORESTAT9 3.TB.014. If pn = 80 and qn = 20, then what is the shape of the binomial distribution? O normal positively skewed O negatively skewed O The shape cannot be determined without more information. DETAILS DEVORESTAT9 3.2.013.MI.SA. This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped par Tutorial Exercise A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given. X 0 1 2 3 4 5 6
A poll of 2,153 randomly selected adults showed that 88% of them own cell phones. The technology display below results from a test of the claim that 90% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test pf p= 0.9 vs p≠ 0.9 Sample 1 X 1893 N 2,153 Sample p 0.879238 95% CI (0.865474, 0.893002) Z-Value -3.21 P-Value 0.001 Is it a two tailed?Right tailed? Left tailed? What is the test statistic? What is the P-value? What is the null hypothesis and what is concluded about it? What is the final conclusion?

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10. DETAILS DEVORESTAT9 3.TB.020. If pn = 40 and qn => 20, then what is the shape of the binomial distribution? O normal O positively skewed O negatively skewed O cannot be determined without additional information