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Tables are attached For W13-15. Suppose a survey found 30% of people over the age of...
8) Assume that 15?% of people are? left-handed. Suppose 14 people are selected at random. Answer...
8) Assume that 15?% of people are? left-handed. Suppose 14 people are selected at random. Answer each question about? right-handers below. a)find the mean and standard deviation of the number of right-handers in the group. b)what's the probability that they're not all right-handed? c)what's the probability that there are no more than 8 righties? d)what's the probability that there are exactly 6 of each?
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age...
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age of 25 have earned a high school diploma. Suppose we are going to take a random sample of 200 Americans in this age group and calculate what proportion of the sample has a high school diploma. What is the probability that the proportion of people in the sample with a high school diploma is less than 85%? 0.17 (B 0.23 C 0.20 D 0.26...
Assume that 15% of people are left-handed. Suppose 16 people are selected at random. Answer each...
Assume that 15% of people are left-handed. Suppose 16 people are selected at random. Answer each question about right-handers below. a) Find the mean and standard deviation of the number of right-handers in the group. b) What's the probability that they're not all right-handed? c) What's the probability that there are no more than 10 righties? d) What's the probability that there are exactly 7 of each? e) What's the probability that the majority is right-handed?
According to a consumer survey of young adults (18-24 years of age) who shop online, 30%...
According to a consumer survey of young adults (18-24 years of age) who shop online, 30% own a mobile phone with internet access. In a random sample of 400 young adults who shoponline, let x be the number who own a mobile phone with internet access. a. Explain why x is a binomial random variable (to a reasonable degree of approximation). Choose the correct explanation below. A. The experiment consists of n identical, dependent trials, where there are only two...
Suppose that insurance companies did a survey. They randomly surveyed 410 drivers and found that ...
Suppose that insurance companies did a survey. They randomly
surveyed 410 drivers and found that 300 claimed they always buckle
up. We are interested in the population proportion of drivers who
claim they always buckle up.
NOTE: If you are using a Student's t-distribution, you may
assume that the underlying population is normally distributed. (In
general, you must first prove that assumption, though.)
Part (a)
(i) Enter an exact number as an integer, fraction, or decimal.
x =
(ii) Enter...
According to a consumer survey of young adults (18-24 years of age) who shop online, 29%...
According to a consumer survey of young adults (18-24 years of age) who shop online, 29% own a mobile phone with internet access. In a random sample of 400 young adults who shop online, let x be the number who own a mobile phone with internet access. a. Explain why x is a binomial random variable (to a reasonable degree of approximation). Choose the correct explanation below. A. The experiment consists of n identical, dependent trials, with more than two...
In a large Insurance Company in U.S., people over age thirty five have an annual income...
In a large Insurance Company in U.S., people over age thirty five have an annual income that follows a normal distribution with mean 70,000 and standard deviation 9,000. The incomes of those under age thirty five are also approximately normal, but with mean 45,000 and standard deviation 8,000. With the above information simulate 10000 employees over 35 and 10000 employees under 35 and answer the questions. 21. What is the approximate probability that a randomly picked, employee over 35 will...
1.The number of people sick from imported meat products in a certain city was found to...
1.The number of people sick from imported meat products in a certain city was found to be normally distributed with mean and standard deviation: X≈N(U=190, σ =22). What is the probability that the number sick next month in that city would be between 175 and 194? Select one: a. 0.3231 b. 0.1803 c. 0.1769 d. 0.6769 2.The number of people getting sick from imported meat products in a certain city in one month was found to be normally distributed with...
Use the following to answer questions #13 - 15 The table shows the results of a...
Use the following to answer questions #13 - 15 The table shows the results of a survey that asked 2850 people whether they are involved in any type of charity work. A person is selected at random from the sample Frequently 221 Occasionally 456 430 Not at all 795 Male Total 1472 1378 2850 Total 428 1536 13. The probability the person is frequently or occasionally involved in charity work is: a) 0.0466 ) 0.4611 C) 0.1607 d) 0.4165 423...
homework help please. graphs attached Question Help Suppose that a recent pol found that 40% of...
homework help please. graphs attached
Question Help Suppose that a recent pol found that 40% of adults in a certain country believe that the prevall state of moral values is poor if a survey of a random sample of 15 adults in this country is conducted in which they are asked to disclose their feelings on the overal state of moral values, complete parts al through te below Cck here to view the other p ladsen Click here to view...
Scratchpad According to the US Census Bureau's American Community Survey, 87% of Americans over the age of 25 have earned a high school diploma. Suppose we are going to take a random sample of 200 Americans in this age group and calculate what proportion of the sample has a high school diploma. What is the probability that the proportion of people in the sample with a high school diploma is less than 85%? 0.17 (B 0.23 C 0.20 D 0.26...
Suppose that insurance companies did a survey. They randomly
surveyed 410 drivers and found that 300 claimed they always buckle
up. We are interested in the population proportion of drivers who
claim they always buckle up.
NOTE: If you are using a Student's t-distribution, you may
assume that the underlying population is normally distributed. (In
general, you must first prove that assumption, though.)
Part (a)
(i) Enter an exact number as an integer, fraction, or decimal.
x =
(ii) Enter...
In a large Insurance Company in U.S., people over age thirty five have an annual income that follows a normal distribution with mean 70,000 and standard deviation 9,000. The incomes of those under age thirty five are also approximately normal, but with mean 45,000 and standard deviation 8,000. With the above information simulate 10000 employees over 35 and 10000 employees under 35 and answer the questions. 21. What is the approximate probability that a randomly picked, employee over 35 will...
Use the following to answer questions #13 - 15 The table shows the results of a survey that asked 2850 people whether they are involved in any type of charity work. A person is selected at random from the sample Frequently 221 Occasionally 456 430 Not at all 795 Male Total 1472 1378 2850 Total 428 1536 13. The probability the person is frequently or occasionally involved in charity work is: a) 0.0466 ) 0.4611 C) 0.1607 d) 0.4165 423...
homework help please. graphs attached
Question Help Suppose that a recent pol found that 40% of adults in a certain country believe that the prevall state of moral values is poor if a survey of a random sample of 15 adults in this country is conducted in which they are asked to disclose their feelings on the overal state of moral values, complete parts al through te below Cck here to view the other p ladsen Click here to view...
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