An organization conducts an annual survey of cybersecurity at firms from around the world. In a recentyear, the organization sent survey questionnaires via email to all professionals that hold a certifiedinformation security manager designation. Of the 1,401 firms that responded to the survey, 1,107 (or 79%) expect to experience a cyberattack (for example, aMalware, hacking, or phishing attack) during theyear. You are to estimate the probability of an expected cyberattack at a firm during the year with a 95%confidence interval. Answer the followings:a.b.C.d.What is/are the critical value(s)?What is the margin of error?Identify the 95% confidence interval for the probability of an expected cyberattack at afirm during the year.If the margin of error should be 0.02 or less, what would be the minimum sample size?

The provided information is as follows:The total number of firms is .The total number of firms that…

Answered: An organization conducts an annual…

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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Based on historical data, your manager believes that 34% of the company's orders come from first-time customers. A random sample of 168 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.29 and 0.49?
An examination has historical record of a 25% rate of failure.For a group of 15 students sitting for the exam,calculate the probability that:a. A minimum of 12 will succeed. b.All individuals will successfully complete the exam.
Based on historical data, your manager believes that 33% of the company's orders come from first-time customers. A random sample of 106 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.3 and 0.45?
A survey of U.S. adults ages 18-29 found that 92% use the internet. You randomly select 100 adults ages 18-29 and ask them if they use the internet. The probability that at least 86 people say they use the internet is [ ].
A sample of residents of Santa Monica were asked two questions, whether they had taken a course at Santa Monica College and what type of job they had or hoped to have. Their responses are summarized in the two-way data table below. Tech Industry Health Care Job Business/Finance Other Job Job Category Has taken a 53 104 93 class at SMC 69 Has not taken a class at SMC 82 28 38 151 Use the table to answer the following questions, a. What is the probability that a randomly chosen person has not taken a class at SMC and answered health care job. [Select] b. What is the probability that a randomly chosen person has taken a class at SMC or answered Tech Industry Job? I Select c. Would it be unusual for a person to have not taken a class at SMC and answered health care job? Why or why not? ( Select]
Pap Tests. Medical tests are frequently used to decide whether a person has a particular illness. The sensitivity of a test is the probability that a person having the illness will test positive; the specicity of a test is the probability that a person not having the illness will test negative. According to the National Cancer Institute and the Surveillance Epidemiology and EndResults Fact Sheet, roughly 7.9 per 100,000 women have cancer of the cervix. A Pap test, or Papanicolaou test, is a screening test used to detect precancerous and cancerous cells in the cervix. The specicity of the Pap test is 98% and the sensitivity of the Pap test is 51% according to the Alliance for Cervical Cancer Protection. a. Interpret the sensitivity and specicity of this test in terms of percentages.b. Determine the probability that a randomly selected female tests positive.c. Determine the probability that a female testing positive actually has cervical cancer.d. Interpret your answers from parts (b)…
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The 2015 National Vital Statistics Report provides information on how the nearly four million live births that occurred in 2014 broke down by birth order. Choose at random a baby born in the United States in 2014. Baby's birth order Probability mean = 1 2 0.391 0.319 The few babies who were 9th or more in birth order are included in the "8" birth order group. In 2014, 39.1% of the nearly 4 million live births in the United States were to first-time mothers. 3 5 6 7 4 0.168 0.072 0.028 0.012 0.005 standard deviation = What are the properties of the sampling distribution of the proportion of births to first-time mothers in random samples of 500 births from 2014? (Enter your answer for the mean rounded to three decimal place and your answer for the standard deviation rounded to four decimal places.) 8 0.005
Do cat owners sleep better than those without cats? To help answer this question, a cat enthusiast obtained a random sample of 500 Canadians, each of whom answered two questions: 1. do you have a cat? (yes or no), 2. How well do you sleep? (good, neutral, bad). The dataset “CatSleep.xlsx” contains her findings. Find the probability that a randomly selected Canadian is a bad sleeper and a cat owner. Find the probability that a randomly selected Canadian is a neutral sleeper or a cat owner. Find the probability that a randomly selected non-cat owner is a bad sleeper. That is, find the probability that a randomly selected Canadian is a bad sleeper, given they are not a cat owner Can you handwrite the solution?
Name the method of estimating probabilities based on experience or institution.
Consider records of a company’s account balances. Twenty percent contain errors. Of those balance in errors, 80% are regarded as unusual values based on historical figures. Of all the account balances, 25% were unusual values. If the figure for a particular balance appears unusual on this basis, what is the probability that it is in error?

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