Expert answer:Statistics Week 8 Quiz help

Answer & Explanation:Week 8 Quiz Week 8 Quizw8_quiz.docx
w8_quiz.docx

Unformatted Attachment Preview

Question 1
1. A portion of the population selected to represent the population is called
statistical inference
Data and Statistics
a census
a sample
Question 2
1. The process of analyzing sample data in order to draw conclusions about the
characteristics of a population is called
Data and Statistics
statistical inference
data analysis
data summarization
Question 3
1. A numerical value used as a summary measure for a sample, such as sample mean, is
known as a
population parameter
sample parameter
sample statistic
population mean
Question 4
1. The set of all possible sample points (experimental outcomes) is called
a sample
an event
the sample space
a population
Question 5
1. A numerical description of the outcome of an experiment is called a
descriptive statistic
probability function
variance
random variable
Question 6
1. A description of the distribution of the values of a random variable and their associated
probabilities is called a
probability distribution
random variance
random variable
expected value
Question 7
1. Which of the following is not a characteristic of the normal probability distribution?
The mean, median, and the mode are equal
The mean of the distribution can be negative, zero, or positive
The distribution is symmetrical
The standard deviation must be 1
Question 8
1. A theorem that allows us to use the normal probability distribution to approximate the
sampling distribution of sample means and sample proportions whenever the sample size
is large is known as the
approximation theorem
normal probability theorem
central limit theorem
central normality theorem
Question 9
1. The value added and subtracted from a point estimate in order to develop an interval
estimate of the population parameter is known as the
confidence level
margin of error
parameter estimate
interval estimate
Question 10
1. Whenever the population standard deviation is unknown and the population has a normal
or near-normal distribution, which distribution is used in developing an interval
estimation?
standard distribution
z distribution
alpha distribution
t distribution
5 points
Question 11
1. The level of significance
can be any positive value
can be any value
is (1 – confidence level)
can be any value between -1.96 to 1.96
Question 12
1. When the p-value is used for hypothesis testing, the null hypothesis is rejected if
p-value ≤ α
α < p-value p-value ≥ α p-value = 1 - α 10 points Question 13 1. The p-value is a probability that measures the support (or lack of support) for the null hypothesis alternative hypothesis either the null or the alternative hypothesis sample statistic Question 14 1. The coefficient of correlation is the square of the coefficient of determination is the square root of the coefficient of determination is the same as r-square can never be negative Question 15 1. Regression analysis is a statistical procedure for developing a mathematical equation that describes how one independent and one or more dependent variables are related several independent and several dependent variables are related one dependent and one or more independent variables are related None of these alternatives is correct. ... Purchase answer to see full attachment

How it works

1. Paste your instructions in the instructions box. You can also attach an instructions file
2. Select the writer category, deadline, education level and review the instructions 
3. Make a payment for the order to be assignment to a writer
4.  Download the paper after the writer uploads it 

Will the writer plagiarize my essay?

You will get a plagiarism-free paper and you can get an originality report upon request.

Is this service safe?

All the personal information is confidential and we have 100% safe payment methods. We also guarantee good grades