Exam 5: Introduction to Probability and Sample Statistics

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A basket contains 50 cubes: 20 purple, 15 pink, 10 white, and 5 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

(Multiple Choice)

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Question 21

A researcher collects salary information from the first 30 employees in the human resources roster. Which of the following sampling method is implied by this scenario?

(Multiple Choice)

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Question 22

A random sample of size 30 had a mean of 80 and a standard deviation of 6. First calculate the standard error of the mean. Then calculate the 90% CI for the mean.

(Essay)

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Question 23

If the standard error of the mean is 10 for n = 100, what must the sample size be to reduce the standard error to 5?

(Essay)

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Question 24

A basket contains 12 cubes: 4 pink, 6 purple, and 2 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

(Multiple Choice)

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Question 25

A researcher collects weight loss data from individuals who attend Weight Watchers on Monday. Which of the following sampling method is implied by this scenario?

(Multiple Choice)

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Question 26

A researcher wants their sampling method to be such that every 25^th visitor in the population is selected. Which of the following is the most appropriate sampling method?

(Multiple Choice)

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Question 27

A researcher collects data on the number of minutes exercised from the first 50 members who walk into the gym. Which of the following sampling method is implied by this scenario?

(Multiple Choice)

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Question 28

A bowl contains 15 balls: 5 red, 3 orange, 4 yellow, and 3 blue. The probability that a ball selected at random is yellow is equal to which one of the following?

(Multiple Choice)

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Question 29

If the standard error of the mean is 70 for n = 50, what must the sample size be to reduce the standard error to 50?

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Question 30

Showing 21 - 30 of 30

A basket contains 50 cubes: 20 purple, 15 pink, 10 white, and 5 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

A researcher collects salary information from the first 30 employees in the human resources roster. Which of the following sampling method is implied by this scenario?

A random sample of size 30 had a mean of 80 and a standard deviation of 6. First calculate the standard error of the mean. Then calculate the 90% CI for the mean.

If the standard error of the mean is 10 for n = 100, what must the sample size be to reduce the standard error to 5?

A basket contains 12 cubes: 4 pink, 6 purple, and 2 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

A researcher collects weight loss data from individuals who attend Weight Watchers on Monday. Which of the following sampling method is implied by this scenario?

A researcher wants their sampling method to be such that every 25^th visitor in the population is selected. Which of the following is the most appropriate sampling method?

A researcher collects data on the number of minutes exercised from the first 50 members who walk into the gym. Which of the following sampling method is implied by this scenario?

A bowl contains 15 balls: 5 red, 3 orange, 4 yellow, and 3 blue. The probability that a ball selected at random is yellow is equal to which one of the following?

If the standard error of the mean is 70 for n = 50, what must the sample size be to reduce the standard error to 50?

Introduction

Data Representation

Univariate Population Parameters and Sample Statistics

Normal Distribution and Standard Scores

Inferences About a Single Mean

Inferences About the Difference Between Two Means

Inferences About Proportions

Inferences About Variances

Bivariate Measures of Association

One-Factor Anova: Fixed-Effects Model

Multiple Comparison Procedures

Factorial Anova: Fixed-Effects Model

One-Factor Fixed-Effects Ancova With Single Covariate

Random- and Mixed-Effects Analysis of Variance Models

Hierarchical and Randomized Block Analysis of Variance Models

Simple Linear Regression

Multiple Regression

Logistic Regression

Filters

Exam 5: Introduction to Probability and Sample Statistics

A basket contains 50 cubes: 20 purple, 15 pink, 10 white, and 5 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

A researcher collects salary information from the first 30 employees in the human resources roster. Which of the following sampling method is implied by this scenario?

A random sample of size 30 had a mean of 80 and a standard deviation of 6. First calculate the standard error of the mean. Then calculate the 90% CI for the mean.

If the standard error of the mean is 10 for n = 100, what must the sample size be to reduce the standard error to 5?

A basket contains 12 cubes: 4 pink, 6 purple, and 2 yellow. The probability that a cube selected at random is purple is equal to which one of the following?

A researcher collects weight loss data from individuals who attend Weight Watchers on Monday. Which of the following sampling method is implied by this scenario?

A researcher wants their sampling method to be such that every 25th visitor in the population is selected. Which of the following is the most appropriate sampling method?

A researcher collects data on the number of minutes exercised from the first 50 members who walk into the gym. Which of the following sampling method is implied by this scenario?

A bowl contains 15 balls: 5 red, 3 orange, 4 yellow, and 3 blue. The probability that a ball selected at random is yellow is equal to which one of the following?

If the standard error of the mean is 70 for n = 50, what must the sample size be to reduce the standard error to 50?

Introduction

Data Representation

Univariate Population Parameters and Sample Statistics

Normal Distribution and Standard Scores

Inferences About a Single Mean

Inferences About the Difference Between Two Means

Inferences About Proportions

Inferences About Variances

Bivariate Measures of Association

One-Factor Anova: Fixed-Effects Model

Multiple Comparison Procedures

Factorial Anova: Fixed-Effects Model

One-Factor Fixed-Effects Ancova With Single Covariate

Random- and Mixed-Effects Analysis of Variance Models

Hierarchical and Randomized Block Analysis of Variance Models

Simple Linear Regression

Multiple Regression

Logistic Regression

Filters

A researcher wants their sampling method to be such that every 25^th visitor in the population is selected. Which of the following is the most appropriate sampling method?