34 Answered Questions for the topic Population

Population Science Biology Genetics

10/18/21

When are Alleles identical by descent?

A) they are molecularly indistinguishable. B) they are functionally equivalent. C) they are derived from the same ancestral copy. I believe it's the last one, but I am not sure.
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05/31/21

Please help with statistics!
A population of values has a normal distribution with μ=82.6 and σ=56.2. You intend to draw a random sample of size n=223.Find P9, which is the score separating the bottom 9% scores from the top... more
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04/01/21

Which of the following correctly labels the population?
A farmer sows 100 seeds of a new type of corn and wants to quickly determine the yield, or total number of ears of corn, for the crop when it has matured. He decides to take a simple random sample... more
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12/09/20

What is the test statistic for this problem? Please help!!
The marital status distribution of the U.S. male population, age 15 and older, is as shown below.Marital Status Percent never... more
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Population Algebra 2 Mean

08/13/20

Population mean
Jordan made 6 out of 11 free throws in his last basketball game. estimate the population mean that he will make his free throws
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06/12/20

Intro to statistics

Suppose we want to estimate the average IQ score for the population of statistics students. What is the minimum number of statistics students that must be randomly selected for IQ tests if we want... more
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Population Biology Beetles

12/19/19

You are studying three populations of beetles...
Population A has 10 beetles, of which 1 is brown and 9 are red. Population B has 100 beetles, of which 10 are brown and 90 are red. Population C has 30 beetles; 3 of them are brown and 27 are red.... more
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10/19/19

The world's population is currently 2. If the population doubles every 39 years, what will the population be 15000 years from now?
Hello all. I am writing a fantasy novel and need to calculate population growth for realism purposes. There was another person that asked a similar question on a smaller scale, so I was plugging in... more
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08/23/19

What was happening in Philipsburg, Montana in 1876?
I'm struggling to find much information online about Philipsburg, Montana's population in 1876. Since I believe in 1876 mining was expected to ramp up in the area, the population may have been... more
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Population Geography

02/14/19

Japan population
in the 1950 japan had a population of 83.2 million people. Japan is one of 20 countries with a negative population growth rate. What year will it be when Japan is once again 83.2 million... more
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Population

04/15/18

in a county with a population of 7264 people with a loss annually of 1.2%, what will the population be in 40 years?
this is for figuring a population estimate
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03/13/18

The population P (in thousands) of Pittsburgh, PA from 2000 to 2003 can be modeled by P=2430e^ -0.0029t where t represents the yr, with t=0 corresponds to 2000.
Question: According to the model, when will the population be approximately 2.3 million?   Answer: 19 years.   Can someone please explain/list the steps on how to find this answer? 
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03/13/18

The population P (in thousands) of Pittsburgh, PA from 2000 to 2003 can be modeled by P=2430e^ -0.0029t where t represents the yr, with t=0 corresponds to 2000.
Question: What were the populations of PA in 2000 and 2003?   Answer: 2000: 2,430,000, 2003: 2,408,950   Can someone please explain/list to me the steps to finding these answers?
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Population Math Algebra 1 Algebra 2

01/16/18

Algebra 2 - Bias
A sleep lab wants to know how many hours of sleep people are getting in the state of Maine. The lab uses census data to create proportionally sized groups of various ages, races, genders,... more
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Population Percent Increase

12/02/17

What is the yearly percent increase in bear population each year? How many years will it take for the bear population to grow to 8,792 bears?
The yearly bear population in Yosemite National Park starting in 2003 can be modeled by b(x) = 5173(1.039)x . What is the yearly percent increase in bear population each year? How many years will... more
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Population Math Calculus Math Help

09/02/17

calculus question
A population of grasshoppers quadruples in twenty days. Assuming exponential growth, if the present population is 40 million, what will it be in 50 days? Answer the question by first finding the... more
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Population Rate Of Change

07/28/17

According to the world population....?
According to the US Census, the world population Upper P, in billions, was approximatelyUpper P=6.7 e^0.011 twhere t is in years since January 1, 2007. At what rate was the world’s population... more
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Population Math Math Help Statistic

07/19/17

name the population 45% of chicago residents surveyed, own their own vehicle
Name the population 45% of chicago residents surveyed, own their own vehicle
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11/10/16

How do I predict the population growth in 2050 with this problem?
Starting from a 2013 population of 7.1 billion, use the current annual growth rate of the United States, which is about 0.70%, to (a) find the approximate doubling time (use the rule of 70)... more
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Population

08/31/16

Help with my dissertation
So I need to estimate the people who eats in a certain food court daily. I counted the number of seats which 200, but the problem is what is the probability that this 200 seats will be occupied.... more
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Population

05/10/16

A population of fish in a newly dug pond grows according to the equation P=80001+7e-0.9t where time t is given years. In how many years will there be 4000 fish
i need help on putting this formula together  
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Population Math Modeling

04/29/16

Population decline problem - math modeling
The population of a country was 42 million in 2000 and the natural rate of the decline of the population was 3% per year. Also, let k(t) =e0.6t represent the net rate of growth of the population... more
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04/09/16

Find the base, b, for the exponential equation of the form y=a x b^x that describes each situation.
The population of a town decreased by 2.5% each year. The variable y gives the population after x years. Find the base, b, for the exponential equation of the form y=a x b^x that describes the... more
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04/08/16

If t is time in months, how long does it take for the hummingbird population to double?
The size of a population of hummingbirds over time can be modeled by the equation p=55(2)t/3. How can the constant 55 be interpreted? If t is time in months, how long does it take for the... more
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04/04/16

If a species has a ? = .8, and has a current population size of 100, how many years will it take for the population size to drop below 50 individuals
If a species has a λ = .8, and has a current population size of 100, how many years will it take for the population size to drop below 50 individuals
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