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Traffic enforcement wants to determine a 78% confidence
Traffic enforcement wants to determine a 78% confidence interval for the true proportion of drivers that drive over the speed limit on major highways. A sample size of 52 drivers determines that 20 of… read more
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The blood center is interested in determining which gender -
The blood center is interested in determining which gender - males or females - is more likely to respond to a call to give blood. Random, independent samples of 59 females and 88 males were each aske… read more
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Master's Degree
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A sample of 86 women aged 18-24 yields a mean systolic blood
A sample of 86 women aged 18-24 yields a mean systolic blood pressure of 112.8 mm Hg. Assuming that σ = 43.1 mm Hg, find the margin of error in estimating μ at the 95% level of confidence. Round your … read more
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The state education commission wants to estimate the
The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. In an earlier study, the population proportion was es… read more
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In a study of treating COVID-19 with 1000 subjects, 500
In a study of treating COVID-19 with 1000 subjects , 500 showed improvement from the treatment. Find the margin of error for the 80% confidence interval used to estimate the population proportion… read more
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What price do farmers get for their watermelon crops? In the
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 41 farming regions gave a sample mean of x bar = \$6.88 per 100 pounds of watermelon. Assume that σ i… read more
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For this problem, carry at least four digits after the
For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a random sample of 68 professional actors, it was found that 38 were e… read more
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Thank you for your help on my 1st problem I have another
Thank you for your help on my 1st problem I have another problem:A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a… read more
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Master's Degree
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For the given confidence level and values of x and n, find
For the given confidence level and values of x and n, find the following. x=47, n=95, confidence level 98%(a) Find the point estimate. Round the answers to at least four decimal places, if necessary. … read more
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Tutor
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This problem has three parts (parts a,, c). In a survey of
This problem has three parts (parts a, b, c). In a survey of 140 college students, 35% say that they never exercise in fall semester. Find a 95% confidence interval for the proportion of all college s… read more
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This problem has three parts (parts a,, c). In a survey of
This problem has three parts (parts a, b, c). In a survey of 140 students, 35% say that they never exercise in fall semester. Find a 95% confidence interval for the proportion of all students that say… read more
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Master's Degree
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This problem has three parts (parts a,, c). In a survey of
This problem has three parts (parts a, b, c). In a survey of 140 students, 35% say that they never exercise in fall semester. Find a 95% confidence interval for the proportion of all students that say… read more
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The FBI wants to determine the effectiveness of their 10
The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to find out the fraction of people who appear on the list that are actually caught.Step 2 of 2 : Suppose … read more
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I have about 10 or 12 statistics problems for MAT 300 class,
I have about 10 or 12 statistics problems for MAT 300 class, mostly word problems. Can someone help with that? I don't need to show work just the answers.. I am completely stuck… read more
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A nursing school wants to estimate the true mean annual income
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 200 of its alumni. The mean annual income was \$52,500 with a standard deviation of \$1,800. Find a 95% … read more
Greg
Master's Degree
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3. A fair coin is tossed 5 times. What is the probability
3. A fair coin is tossed 5 times. What is the probability of obtaining exactly 3 heads? a. 1/32 b. 1/16 c. 5/96 d. 5/16 e. 3/32 4. Information is being collected about university students at a particu… read more
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Master's Degree
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Find the margin of error that corresponds to the given ...
Find the margin of error that corresponds to the given values of n (times) and x (successes) and the degree of confidence: n = 1400, x = 420, 95%. Give the answer to 3 decimal places of precision.… read more
abozer
Bachelor's Degree
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you are a traveling agent and wish to estimate, with 95% ...
you are a traveling agent and wish to estimate, with 95% confidence, the proportion of vacationers who plan to travel outside the U.S. in the next 12 months. your estimate must be accurate within 3% o… read more
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