A meteorologist was interested in the average speed of a thunderstorm in his area. He sampled 13 thunderstorms and found that the average speed at which they traveled across the area was 15 miles per hour with a sample standard deviation of 1.7 miles per hour.
Assuming the speed of a thunderstorm is approximately normal, construct a 99% confidence interval for the true average speed of a thunderstorm in his area.
Question
How would I enter this into a TI84 calculator?
In: Statistics and Probability
Will upvote best answer. Please show work. Thank you!
The average gas mileage of a certain model car is 28 miles per gallon. If the gas mileages are normally distributed with a standard deviation of 1.5, find the probability that a car has a gas mileage of between 25.8 and 29.3 miles per gallon.
a. 0.18
b. 0.20
c. 0.15
d. 0.26
e. 0.48
f. 0.74
g. None of the above
In: Statistics and Probability
3. The distances traveled by individuals to work is exponential, with a mean of 9 miles.
(a) What is the probability that they travel between 5 and 11 miles? (2)
(b) What is the 80th percentile of this distribution? (2)
4. The annual number of crimes in a city has a normal distribution, with mean 200, and standard deviation 42.
(a) What is the probability of less than 150 crimes next year? (2)
(b) What is the 75th percentile of this distribution? (2)
In: Statistics and Probability
ABC Delivery Company purchased a new delivery truck on January 1 with an original cost of $50,000. The company estimates it will use the truck for 5 years and drive a total of 100,000 miles. It plans to sell the truck at the end of the five years for $5,000. During the first year, the truck was driven 15,000 miles. What is the depreciation for the first year using the DoubleDeclining Balance method?
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$10,000 |
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$18,000 |
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$7,500 |
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$20,000 |
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$6,750 |
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$9,000 |
In: Accounting
Kyle’s Shoe Stores Inc. is considering opening an additional
suburban outlet. An aftertax expected cash flow of $160 per week is
anticipated from two stores that are being evaluated. Both stores
have positive net present values.
| Site A | Site B | ||||||||||||||
| Probability | Cash Flows | Probability | Cash Flows | ||||||||||||
| 0.2 | 70 | 0.1 | 50 | ||||||||||||
| 0.2 | 160 | 0.2 | 80 | ||||||||||||
| 0.3 | 170 | 0.2 | 160 | ||||||||||||
| 0.3 | 210 | 0.4 | 210 | ||||||||||||
| 0.1 | 230 | ||||||||||||||
a. Compute the coefficient of variation for each
site. (Do not round intermediate calculations. Round your
answers to 3 decimal places.)
b. Which store site would you select based on the
distribution of these cash flows? Use the coefficient of variation
as your measure of risk.
Site A
Site B
In: Finance
| X | 1 | 2 | 3 | 4 | 5 |
| P(X) | 0.2 | 0.3 | 0.1 | 0.3 |
a) Finish the probability table
b) Define Y = -2X+6 .
c) Calculate E(X) Std(X) E(Y) Std(Y)
In: Statistics and Probability
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Let p and q be the propositions |
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| Determine whether each of these conditional statements is true or false. 2 a) If 1+1= 2, then 2 +2 !! en c) If l+I= 3, then 2+2 =5. |
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| Write each of these propositions in the form "p if and only if q" in English. a) If it is hot outside you buy an ice cream cone, and if you buy an ice cream cone it is hot outside. b) For you to win the contest it is necessary and sufficient that you have the only winning ticket. |
| Let p, q, and r be the propositions p:Grizzly bears have been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. Write these propositions using p, q, and r and logical connectives. a) Berries are ripe along the trail, but grizzly bears have not been seen in the area. b) Grizzły bears have not been seen in the area and hiking on the trail is safe, but berries are ripe along the trail. c) Ifberries are ripe along the trail, hikingg is safe if and only ifgrizzly bears have not been seen in the area. d) It is not safe to hike on the trail, but grizzly bears have not been seen in the area and the berries along the trail are ripe. |
| How many rows appear in a truth table for each of these compound propositions? 5 a) p→-p b) (pv )A(qvs) |
In: Computer Science
Why are astronomical distances not measured with standard referent units of distance such as kilometers or miles?
In: Physics
What is Miles & Snow’s typology? Apply this concept to an Omani company of your choice?
In: Operations Management