# Project #70991 - Math 14 questions

Need just answers only no need work out the problem for me

14 Math questions, need it in about 22hrs from now as I post it, I am not on pacific time Â I am on Florida Time So I post this at 1pm and need tomorrow by 10amÂ

 Question 1 2.5 Points

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. What is the probability that at least two heads occur consecutively?

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 A. 1/8 Â Â B. 3/8 Â Â C. 5/8 Â Â D. 6/8 Â Â Â Â Â Â Â Â

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 Question 2 2.5 Points

The probability that Luis will pass his statistics test is 0.94. Find the probability that he will fail his statistics test.

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A. 0.02

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B. 0.05

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C. 0.94

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D. 0.06

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 Question 3 2.5 Points

The distribution of B.A. degrees conferred by a local college is listed below, by major.

MajorÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Frequency

EnglishÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  2073

MathematicsÂ Â Â Â Â Â Â  2164

ChemistryÂ Â Â Â Â Â Â Â Â Â Â  318

PhysicsÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â  856

Liberal ArtsÂ Â Â Â Â Â Â Â Â  1358

BusinessÂ Â Â Â Â Â Â Â Â Â Â Â Â  1676

EngineeringÂ Â Â Â Â Â Â Â Â  868

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 9313

What is the probability that a randomly selected degree is not in Business?Â

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 A. 0.7800 Â Â B. 0.8200 Â Â C. 0.8300 Â Â D. 0.9200 Â Â Â Â Â Â Â Â

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 Question 4 2.5 Points

Joe dealt 20 cards from a standard 52-card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards by 10. Determine which deal is closer to the 50/50 ratio of red/black expected of fairly dealt hands from a fair deck and why.

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 A. The first series is closer because 1/10 is farther from 1/2 than is 1/8. Â Â B. The series closer to the theoretical 50/50 cannot be determined unless the number of red and black cards for each deal is given. Â Â C. The second series is closer because 20/30 is closer to 1/2 than is 14/20. Â Â D. The first series is closer because the difference between red and black is smaller than the difference in the second series. Â Â Â Â Â Â Â Â

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 Question 5 2.5 Points

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH,

HTT, THH, THT, TTH, TTT. What is the probability of getting at least one head?

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 A. 4/9 Â Â B. 5/6 Â Â C. 7/8 Â Â D. 5/8 Â Â Â Â Â Â Â Â

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 Question 6 2.5 Points

If a person is randomly selected, find the probability that his or her birthday is not in May. Ignore leap years. There are 365 days in a year. Express your answer as a fraction.

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A. 335/365

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B. 334/365

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C. 336/365

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D. 30/365

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 Question 7 2.5 Points

A sample of nine students is selected from among the students taking a particular exam. The nine students were asked how much time they had spent studying for the exam and the responses (in hours) were as follows:

18, 7, 10, 13, 12, 16, 5, 20, 21

Estimate the mean study time of all students taking the exam. Round your answer to the nearest tenth of an hour if necessary.

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 A. 13 hours Â Â B. 12.2 hours Â Â C. 13.6 hours Â Â D. It is not possible to estimate the population mean from this sample data Â Â Â Â Â Â Â Â

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 Question 8 2.5 Points

Among a random sample of 150 employees of a particular company, the mean commute distance is 29.6 miles. This mean lies 1.2 standard deviations above the mean of the sampling distribution. If a second sample of 150 employees is selected, what is the probability that for the second sample, the mean commute distance will be less than 29.6 miles?

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 A. 0.8849 Â Â B. 0.5 Â Â C. 0.1131 Â Â D. 0.1151 Â Â Â Â Â Â Â Â

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 Question 9 2.5 Points

Write possible coordinates for the single outlier such that it would no longer be an outlier.

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 A. (23, 18) Â Â B. (20, 5) Â Â C. (15, 15) Â Â D. (12, 15) Â Â Â Â Â Â Â

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 Question 10 2.5 Points

The graph shows a measure of fitness (y) and miles walked weekly. Identify the probable cause of the correlation.

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 A. The correlation is coincidental. Â Â B. There is a common underlying cause of the correlation. Â Â C. There is no correlation between the variables. Â Â D. Walking is a direct cause of the fitness. Â  Â  Â Â Â Â Â Â Â Â

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 Question 11 2.5 Points

Select the best estimate of the correlation coefficient for the data depicted in the scatter diagram.

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 A. -0.9 Â Â B. 0.1 Â Â C. 0.5 Â Â D. 0.9 Â Â Â Â Â Â Â

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 Question 12 2.5 Points

The scatter plot and best-fit line show the relation among the number of cars waiting by a school (y) and the amount of time after the end of classes (x) in arbitrary units. The correlation coefficient is -0.55. Use the line of best fit to predict the number of cars at time 4 after the end of classes.

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 A. 7.0 Â Â B. 6.0 Â Â C. 8.0 Â Â D. 3.5 Â Â Â Â Â Â Â

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 Question 13 2.5 Points

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

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A. 28.0 to 30.0

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B. 25.0 to 27.0

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C. 29.0 to 31.0

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D. 27.0 to 29.0

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 Question 14 2.5 Points

A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of \$30. Past studies suggest that a population standard deviation of \$248 is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated accuracy.

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 A. 274 Â Â B. 284 Â Â C. 264 Â Â D. 272 Â Â Â Â Â Â Â Â

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 Subject Mathematics Due By (Pacific Time) 05/14/2015 10:00 am
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