Question

about 81% of the worlds population can roll their tongue. what
is the probability that in a random sample of 2,000 people, more
than 1,600 of them can roll their tongue

Answer #1

This is a binomial distribution question with

n = 2000

p = 0.81

q = 1 - p = 0.18999999999999995

This binomial distribution can be approximated as Normal distribution since

np > 5 and nq > 5

Since we know that

P(x > 1600.0)=?

The z-score at x = 1600.0 is,

z = -1.14

This implies that

P(x > 1600.0) = P(z > -1.14) = 1 - 0.1271431505627983

P(x > 1600.0) = {**0.8729**}

Please hit thumps up if the answer helped you

. Blue eyes and
inability to roll the tongue are recessive traits
in humans.
Brown
eyes and tongue rolling are dominant
traits.
Illustrate the F2
generation of two people: one who are heterozygous for both
traits.
Let B stand for brown eyes and b
stand for blue eyes, R for the ability to roll the tongue and r for
the
inability to roll the tongue.
Determine the phenotypic ratio in their offspring.
Parent Genotypes _BbRr x __________...

I am going to roll two fair dice.
List the sample space
What is the probability that I will roll a 3 on one of them
when I roll both at the same time?
What is the probability that I will roll at
least a sum of 7 when I roll them both?
Define mutually exclusive
Define independent

The percentage of the Illinois population with diabetes is
believed to be 9.1%.
B1) Suppose we decided to take a random sample
of 20 people from the Illinois population.
What is the probability that none of them have diabetes? (2
pts)
What is the probability that at least 20% of the sample has
diabetes? (2 pts)
B2) Suppose we decided to take a random sample
of 200 people from the Illinois population.
How many people would we expect to have...

A random sample of n=81 observations is drawn from a population
with a mean equal to 57 and a standard deviation equal to 54, find
the probability if x is less than 51, x is greater than 66, and if
x falls between 51 and 63

The percentage of the population that is in support of the
current government is unknown, so a simple random sample of 700
people is selected from around the country. From the sample, 287
people support the current government. What is an estimate for the
probability that from a simple random sample of size 20, than more
than 5 of them support the government? Round your answer to 4
decimal places.

The weight X (in pounds) of a roll of steel is a random variable
with probability density function given by f(x) = (x - 499)/2 if
499 < x < 501 and zero otherwise. A roll is considered
defective if its weight is less than 500 pounds.
(a) If 3 independent rolls of steel are examined, find the
probability that exactly one is defective.
(b) If 64 independent rolls of steel are examined, approximate the
probability that at least 20...

Find the probability and interpret the results.
Ifconvenient,use technology to find the probability.
The population mean annual salary for environmental compliance
specialists is about $65,500. A random sample of 37 specialists is
drawn from this population. What is the probability that the mean
salary of the sample is less than $62,500? Assume
sigma=$5,600.
The probability that the mean salary of the sample is less than
$62,500 is?

15. Random samples of size 81 are taken from an infinite
population whose mean and standard deviation are 200 and 18,
respectively. The distribution of the population is unknown. The
mean and the standard error of the mean are (assuming infinite
population)
a. 200 and 18
b. 81 and 18
c. 9 and 2
d. 200 and 2
16. A population has a mean of 300 and a standard deviation of
18. A sample of 144 observations will be taken....

The proportion of left hand dpeople in the general population is
about 40%.Suppose a random sample. of 36 people is observed.
What is the probability of obtaining 20 or less left handed
people in your sample of 36?

40% of the population has type A blood.
a) If 8 people are selected at random, what is the probability that
four or less of them have type A blood?
b) If 80 donors come to give blood one day, what is the probability
that 40 or less of them have Type A blood (using the normal
approximation)? Explain why this is higher or lower than the answer
in part (a).
c) If 10 people give blood one day, what...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 22 minutes ago

asked 30 minutes ago

asked 34 minutes ago

asked 43 minutes ago

asked 43 minutes ago

asked 48 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago