Explain
Question 1 (1 point)
A correlation of r = +0.7 between gender and height for a sample of adults.
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Reasonable |
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Not reasonable |
Question 2 (1 point)
We select a sample of 50 days throughout the calendar year. A correlation of r = −1 between number of slurpees (a frozen beverage) sold at 7-Eleven and number of cups of hot chocolate sold at the same store.
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Reasonable |
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Not reasonable |
Question 3 (1 point)
Select a sample of novels. A correlation of r = +0.8 between number of pages in a novel and time it takes to read the novel.
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Reasonable |
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Not reasonable |
Question 4 (1 point)
Select a sample of marathon runners. Let X = time it takes a runner to finish the race and Y = number of competitors who finish ahead of the runner.
A correlation of r = −0.8 between X and Y.
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Reasonable |
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Not reasonable |
In: Statistics and Probability
QUESTION 2
Table 2 displays effects of stingless bee honey consumption (1000mg/kg) for 14 days in male and female rats. Based on the data, answer the following questions.
TABLE 2
|
Biochemical Parameter |
Gender |
Rat 1 2 3 4 |
|||
|
Urea (mmol/L) |
Male |
9.1 |
9.4 |
8.5 |
8.5 |
|
Female |
9.4 |
8.9 |
7.8 |
8.1 |
|
|
Total Cholesterol (mmol/L) |
Male |
2.2 |
2.3 |
1.8 |
1.9 |
|
Female |
2.3 |
2.3 |
2.6 |
2.3 |
|
|
Triglycerides (mmol/L) |
Male |
1.1 |
0.9 |
0.7 |
0.9 |
|
Female |
1.2 |
0.8 |
0.8 |
01.0 |
|
In: Biology
An electrical power line connecting Miami to Key largo which is 48 miles long has been cut at some random point so that the distance between the cut-point from Miami, X, can be assumed to have a uniform distribution. Find the probability that distance between the cut-point and Miami is more than 4 times the distance between the cut-point and the key Largo.
In: Statistics and Probability
Emily rows six miles downstream in 1 hour and her friend Ashley, rowing 1 mile per hour faster, completes the return trip in 2 hours.
If Emily and Ash ley were rowing separately, who would complete their trip first and by how long? Round to the nearest hundredth, if necessary.
speed of the current:2mph.
rowing speed of Emily.
rowing speed of Ashley.
In: Physics
In each of the following situations, identify the independent
variable and dependent variable.
Determine whether the growth is linear or exponential and explain
why by the definition of linear and
exponential growth (Do not present the table)
a) The price of gasoline has been rising 2% per month.
b) The total cost of a taxi ride increases by $ 5 per 2
miles.
c) The population of a bacteria is double every 20 hours.
In: Math
9. A flowering plant species grows on the mainland near the
coast. One summer, a tropical storm
blows seeds from this population several hundred miles out to sea.
Some of the seeds land on an
island, where they form a new population. Describe two ways that
speciation could occur in this
situation. Include the concepts of genetic drift, gene pool,
reproductive isolation, and selection in your
description.
In: Biology
In August 2010, massive downpours caused widespread flooding across Pakistan, killing at least 1500 people. Many times flood waters breached a riverbank and cut a new course for hundreds of miles, destroying villages days later that were not warned of the impending flood waters. Develop 10 ideas that could have prevented the deaths in these villages. Provide descriptions and/or sketches of each idea.
In: Mechanical Engineering
1. A random sample of 10 drivers reported the below-average mileage in the city for their cars. 18, 21, 24, 25, 25, 25, 25, 26, 29, & 31. The mean of the sample is 24.9 miles per gallon, with an associated standard deviation of about 3.6. Assuming the population mean =3.71. Find the 95% confidence interval for the average mileage of the cars for all of the drivers in the class.
In: Statistics and Probability
Earth Satellites
| Table of Earth Satellites | ||||||
| ISS | Hubble | GPS | Geosynchronous satellite | Moon | ||
| h (miles); height above earth's surface | 248 | 12550 | ||||
| r (m) | 54.5 | 3.85 x 108 | ||||
| v(m/s) | 7.56 x 103 | |||||
| T(s); period | 4.32 x 104 | 8.62 x 104 | ||||
| days/revolution | 1.0 | |||||
| Revolutions/day | 1.0 | |||||
In: Physics
9) for the reaction
[ 2Al + 3H2SO4 → Al2(SO4)3 + 3 H2SO4] 6.0 g of Al (MW=26.98 g/mol)
are added to 12.0 mL of 0.20 M of H2SO4
A) what is the limiting reagent in the above reaction?
b) how many miles of H2SO4 will be formed?
c) how many grams of Al2(SO4)3 (MW=342.15 g/mol) are produced in the reaction?
In: Chemistry