Question

65% of customers own a car.

A random sample of 98 people is obtained.

1. Whats a description of the sampling distribution of p^ for samples of n=98?

2. What is the probability that the proportion of people that own a car is greater than 75%?

Answer #1

TOPIC:Sampling distribution of the sample proportion.

Suppose a simple random sample of size nequals=75 is obtained
from a population whose size is Upper N equals N=25,000 and whose
population proportion with a specified characteristic is p equals
0.6
1. Describe the sampling distribution of p hat
2. Determine the mean of the sampling distribution
3. Determine the standard deviation of the sampling
distribution
4. What is the probability of obtaining xequals=48 or more
individuals with the characteristic? That is, what is
P(ModifyingAbove p with caretpgreater than or...

Suppose a simple random sample of size n=200 is obtained from a
population whose size is N = 20000
and whose population proportion with a specified characteristic
is p equals 0.8.
(a) Describe the sampling distribution of
Determine the mean of the sampling distribution
Determine the standard deviation of the sampling
distribution
(b) What is the probability of obtaining x= 168or more
individuals with the characteristic? That is, what is P(p greater
than or equal to 0.84?
(c) What is...

8. A random sample of size n = 75 is obtained from a population
whose size is N = 12,000 and whose population proportion with a
specified characteristic is P =0.8 . Describe the sampling
distribution of p.

According to a survey in a country, 39% of adults do not own a
credit card. Suppose a simple random sample of 300 adults is
obtained. Complete parts (a) through (d) below. (a) Describe the
sampling distribution of ModifyingAbove p with caret, the sample
proportion of adults who do not own a credit card. Choose the
phrase that best describes the shape of the sampling distribution
of ModifyingAbove p with caret below. A. Not normal because n less
than or...

According to a survey in a country, 23% of adults do not own a
credit card. Suppose a simple random sample of 400 adults is
obtained. Complete parts (a) through (d) below.
a) Describe the sampling distribution of ModifyingAbove p with
caretp, the sample proportion of adults who do not own a credit
card. Choose the phrase that best describes the shape of the
sampling distribution of ModifyingAbove p with caretp below. A.
Approximately normal because n less than or...

The random sample of 400 people is selected and the population
proportion is .29.
a) Describe the sampling distribution of the sample proportion
(name of of distribution such as mu or beta)
b) Find the probability of obtaining the sample proportion is
greater than .33
c) Find the sample proportion that has the top 7%

Suppose a simple random sample of size n+75 is obtained from a
population whose size is N=10,000 and whose population proportion
with a specified characteristic is p= 0.6 . Complete parts (a)
through (c) below.
(a) Describe the sampling distribution of p^. Choose the phrase
that best describes the shape of the sampling distribution
below.
A.) Not normal because n<_ 0.05N and np(1-p)<10.
B.) Approximately normal because n<_0.05N and
np(1-p)>_10.
C). Not normal because n<_0.05N and np(1 -p)>_10.
D). Approximately...

According to a survey in a country, 27% of adults do not own a
credit card. Suppose a simple random sample of 500 adults is
obtained. Complete parts (a) through (d) below.
(a) Describe the sampling distribution of
ModifyingAbove p with caretp,
the sample proportion of adults who do not own a credit card.
Choose the phrase that best describes the shape of the sampling
distribution of
ModifyingAbove p with caretp
below.
A.Approximately normal because
n less than or equals...

According to a survey in a country, 2727% of adults do not own
a credit card. Suppose a simple random sample of 900900 adults is
obtained. Complete parts (a) through (d) below. (a) Describe the
sampling distribution of ModifyingAbove p with caretp, the sample
proportion of adults who do not own a credit card. Choose the
phrase that best describes the shape of the sampling distribution
of ModifyingAbove p with caretp below. A. Approximately normal
because n less than or...

A simple random sample size of n=800 is obtained from a
population whose size is N=10,000,000 and whose population
proportion with a specified characteristic is p=.32.
a)describe the sampling distribution
b) What is the probability of obtaining x=350 or more
individuals with the characteristic?

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