Question 1

A group of students were tested using a new software program.The researchers observed a sample mean of with a sample size of N = 20.They know the population mean is $\begin{array}{l}
\bar{X}=42 \
\alpha=.05
\end{array}$ $\mu=38$ and $\sigma=10$ , so they use and a one-tailed test to determine if their sample is greater than the known population mean.

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The answer of A group of students were tested using...

Question 2

The introductory biology class at State University is conducting a study of water quality in their local community.The population mean of a certain beneficial bacteria found in drinking water $\mu=$ 100, with $\sigma_{x}=25$ The bacteria counts from the community are given below.Use a two-tailed rejection region with a total area of 0.01.What is the standard error of the mean?

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Question 3

What is the basic premise we begin with in regards to all inferential procedures?

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Question 4

The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$ is 200 on a test measuring math skills of middle school students.The variance is
.The test scores for the students in Mr.Petri's class at Suburban Middle School are given below.Use a
rejection region with a probability of 5% only in the upper tail.What is the z-value?

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The answer of The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$...

Question 5

What is the typical criterion probability used by researchers?

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Question 6

What are the two fundamental reasons why a sample mean may differ from a particular population mean?

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Question 7

Professor White felt that he had a representative sample--but he starting to wonder if he really did.Briefly note what might make Professor White feel this way.

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The answer of Professor White felt that he had a...

Question 8

Suppose you flip a fair coin five times.Which of the following combinations is most likely to occur?
HHHHH HTHTH

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The answer of Suppose you flip a fair coin five...

Question 9

The introductory biology class at State University is conducting a study of water quality in their local community.The population mean of a certain beneficial bacteria found in drinking water $\mu=$ 100, with $\sigma_{x}=25$ The bacteria counts from the community are given below.Use a two-tailed rejection region with a total area of 0.01.What critical value should you use?

Accepted Answer

The answer of The introductory biology class at State University...

Question 10

At a carnival game, you'll win a prize if you pick a rubber duck out of a pool that has a red dot on the bottom.If only 3 ducks out of 95 present have such a dot, what is your probability of winning a prize?

Accepted Answer

The answer of At a carnival game, you'll win a...

Question 11

The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$ is 200 on a test measuring math skills of middle school students.The variance is
.The test scores for the students in Mr.Petri's class at Suburban Middle School are given below.Use a
rejection region with a probability of 5% only in the upper tail.What critical value should you use?

Accepted Answer

The answer of The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$...

Question 12

What are the three basic steps used to ascertain whether a sample represents a given population?

Accepted Answer

The answer of What are the three basic steps used...

Question 13

The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$ is 200 on a test measuring math skills of middle school students.The variance is
.The test scores for the students in Mr.Petri's class at Suburban Middle School are given below.Use a
rejection region with a probability of 5% only in the upper tail.What should you conclude?

Accepted Answer

The answer of The mean of the population $\sigma_{X}^{2}=100$ $(\mu)$...

Question 14

Suppose you are doing a poll of various attitudes for students at your college.You are especially interested in having an accurate representative sample based on student's geographical home area within the United States.Suppose at your college, 45% hail from the Northeast, 30% originate from the Midwest, 15% are from the West, and 10% are from the South.If you are looking to have a sample of 200 individuals, who should be included in order to have a representative sample?

Accepted Answer

The answer of Suppose you are doing a poll of...

Quiz 6: Using Probability to Make Decisions About Data

What is the basic premise we begin with in regards to all inferential procedures?

What is the typical criterion probability used by researchers?

What are the two fundamental reasons why a sample mean may differ from a particular population mean?

Professor White felt that he had a representative sample--but he starting to wonder if he really did.Briefly note what might make Professor White feel this way.

Suppose you flip a fair coin five times.Which of the following combinations is most likely to occur? HHHHH HTHTH

At a carnival game, you'll win a prize if you pick a rubber duck out of a pool that has a red dot on the bottom.If only 3 ducks out of 95 present have such a dot, what is your probability of winning a prize?

What are the three basic steps used to ascertain whether a sample represents a given population?