Statistic Homework: will send photos for a better view of the questions: 7.1, 7.2, 7.3
Statistic Homework: will send photos for a better view of the questions: 7.1, 7.2, 7.3.
Can you help me understand this Statistics question?
A magazine provided results from a poll of 10001000
adults who were asked to identify their favorite pie. Among the
10001000
respondents,
1212%
chose chocolate pie, and the margin of error was given as
plus or minus±33
percentage points. Describe what is meant by the statement that “the margin of error was given as
plus or minus±33
percentage points.”
Choose the correct answer below.
The statement indicates that the study is 100%minus−33%equals=9797%
confident that the true population percentage of people that prefer chocolate pie is
1212%.
The statement indicates that the study is only 33%
confident that the true population percentage of people that prefer chocolate pie is exactly
1212%.
The statement indicates that the interval 1212%plus or minus±33%
is likely to contain the true population percentage of people that prefer chocolate pie.
The statement indicates that the true population percentage of people that prefer chocolate pie is in the interval 1212%plus or minus±33%.
Find the critical value z Subscript alpha divided by 2zα/2
that corresponds to the given confidence level.
9999%
z Subscript alpha divided by 2zα/2equals=nothing
(Round to two decimal places as needed.)
Find the critical value z Subscript alpha divided by 2zα/2
that corresponds to the confidence level
8585%.
z Subscript alpha divided by 2zα/2equals=nothing
(Round to two decimal places as needed.)
Use the sample data and confidence level given below to complete parts (a) through (d).
A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 983n=983
and
x equals 518x=518
who said “yes.” Use a
95 %95%
confidence level.
Click the icon to view a table of z scores.
a) Find the best point estimate of the population proportion p.
nothing
(Round to three decimal places as n
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 360360
babies were born, and
306306
of them were girls. Use the sample data to construct a
9999%
confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?
nothingless than<
pless than<nothing
(Round to three decimal places as needed.)
Which concept below is NOT a main idea of estimating a population proportion?
Choose the correct answer below.
Using a sample statistic to estimate the population proportion is utilizing descriptive statistics.
Knowing the sample size necessary to estimate a population proportion is important.
We can use a sample proportion to construct a confidence interval to estimate the true value of a population proportion.
The sample proportion is the best point estimate of the population proportion.
Which of the following groups has terms that can be used interchangeably with the others?
Choose the correct answer below.
Critical Value, Probability, and Proportion
Critical Value, Percentage, and Proportion
Percentage, Probability, and Proportion
Critical Value, Percentage, and Probability
Fill in the blank.
A _______ is a single value used to approximate a population parameter.
A ▼
continuity correction
point estimate
sample size
confidence interval
is a single value used to approximate a population parameter.
Statistic Homework: will send photos for a better view of the questions: 7.1, 7.2, 7.3
