I read that once a population reaches 25% of a certain trait or ideal (in human populations) that it will increase exponentially after that, is this true and is there a name for this increase?

I read that once a population reaches 25% of a certain trait or ideal (in human populations) that it will increase exponentially after that, is this true and is there a name for this increase?

A simple random sample of women aged 18-24 is selected, and the systolic blood pressure of each woman is measured. The results (in mmHg) are as follows: = 120.7, s = 14.7. The sample size is less...

You are running a Major-League Baseball team. Your analyst tells you that based on her analysis, the number of games a team wins is related to the average salary the owner pays to the players. The...

Its a golf question, par is 74 and standard deviation is 6. I already made the normal curve and showed the 68 - 95 - 99.7 rule. Need to know how many shots about 95% of golfers took.

How many ways can 6 balls be put into 4 boxes? What formula is used to solve?

Which county had the highest median income between 2006 to 2010? The answer is Los Angeles. I have a real data, how do I turn this question to a hypothesis and which test do I use?

The lengths of metal bolts produced by a machine are found to be normally distributed with a mean of 19.8 cm and a standard deviation of 0.3 cm. There are some concerns that there is a fault...

A random sample is selected of working adults living in CAlgary, Canada. They were asked how long, in minutes is their typical daily commute. The resulting sample mean was 28.5 minutes and the resulting...

On a(n) 25-problem test, how many ways can a person get 8 problems correct and 17 problems wrong?

Students in a college course take a common final exam. The exam scores are normally distributed with a mean of 76 and a standard deviation of 8. Bob scored an 88.What percent of students scored...

please help

Claim: H0: ų1= ų2 X1 = 20, s1 = 3, n1 = 16 X2 = 18, s2 = 2.5, n2 = 12

What is the probability of reaction time for less than 45 sec / reaction time between 30 and 45 sec./ Reaction time is more than 70 sec.

The question on the study guide is as follows: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Joe has an IQ that is higher than 99% of people. What...

A basketball team has won 70% of its games so far this season. What is the probability that it will win 8 of its next 10 games?

A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 2 ounces of...

A sample of size 50 is selected from a normal distribution having a mean of 95 and a standard deviation equal to 15. What is the probability of selecting a sample having a mean exceeding 100?

please provide the solution and the steps prior

The times per workout an athlete uses a stairclimber are normally distributed, with a mean of 20 minutes and a standard deviation of 5 minutes. An athlete is randomly selected. Find the probability...

A sample of 100 apparently normal adult males, 25 years old, had a mean systolic blood pressure of 125. If it is felt that the population standard deviation is 15, find: a) the 90%...

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