## STAT200 Week 6 Quiz

STAT200 Week 6 Quiz in \$50 Only

1. A probability is a number p such that:
A. 0 < p < 1
B. 0 ≤ p ≤ 1
C. -1 < p < 1
D. -1 ≤ p ≤ 1
E. None of the above

02. The Complement rule states that the probability of an event not occurring is
A. equal to one minus the probability it will occur.
B. equal to one minus the probability it will not occur.
C. equal to 0.0
D.  equal to 1.0
E. None of the above

## STAT 200 Week 5 Homework

STAT 200 Week 5 Homework in \$18 Only

4. Why is a 99% confidence interval wider than a 95% confidence interval?

12. A person claims to be able to predict the outcome of flipping a coin. This person is correct 16/25 times. Compute the 95% confidence interval on the proportion of times this person can predict coin flips correctly. What Conclusion can you draw about this test of his ability to predict the future?

15. You take a sample of 22 from a population of test scores, and the mean of your sample is 60. (a) You know the standard deviation of the population is 10. What is the 99% confidence interval on the population mean. (b) Now assume that you do not know the population standard deviation, but the standard deviation in your sample is 10. What is the 99% confidence interval on the mean now?

## STAT 200 Week 6 Homework

STAT 200 Week 6 Homework in \$25 Only
18. You choose an alpha level of .01 and then analyze your data.
a. What is the probability that you will make a Type I error given that the null hypothesis is true?
b. What is the probability that you will make a Type I error given that the null hypothesis is false?

7. Below are data showing the results of six subjects on a memory test. The three scores per subject are their scores on three trials (a, b, and c) of a memory task.
Are the subjects get- ting better each trial? Test the linear effect of trial for the data.

## STAT 200 Week 7 Homework and Quiz 3

STAT 200 Week 7 Homework and Quiz 3 in \$45 Only

Lane – Ch. 14

2. The formula for a regression equation is Y’ = 2X + 9.

a. What would be the predicted score for a person scoring 6 on X?

b. If someone’s predicted score was 14, what was this person’s score on X?

6. For the X,Y data below, compute:

a. r and determine if it is signiﬁcantly different from zero.

b. the slope of the regression line and test if it differs signiﬁcantly from zero.

c. the 95% conﬁdence interval for the slope.

## STAT 200: Introduction to Statistics Final Examination

STAT 200: Introduction to Statistics Final Examination, Spring 2016 OL1/US1 in \$79 Only

STAT 200: Introduction to Statistics Final Examination, Spring 2016 OL1/US1

1. True or False. Justify for full credit.
(a) The standard deviation of a data set cannot be negative.
(b) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.2.
(c) The mean is always equal to the median for a normal distribution.
(d) A 95% confidence interval is wider than a 98% confidence interval of the same parameter.
(e) In a two-tailed test, the value of the test statistic is 1.5. If we know the test statistic follows a Student’s t-distribution with P(T < 1.5) = 0.98, then we fail to reject the null hypothesis at 0.05 level of significance .
2. Identify which of these types of sampling is used: cluster, convenience, simple random, systematic, or stratified. Justify for full credit.

## STAT 200 OL1/US1 Sections Final Exam Fall 2015

STAT 200 OL1/US1 Sections Final Exam Fall 2015 in \$99 Only

STAT 200 OL1/US1 Sections Final Exam Fall 2015 | Complete Solution

STAT 200: Introduction to Statistics Final Examination, Fall 2015 OL1/US1
STAT 200 OL1/US1 Sections Final Exam Fall 2015

The final exam will be posted at 12:01 am on October 9, and it is due at 11:59 pm on October 11, 2015. Eastern Time is our reference time. This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed.Answer all 25 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from programs or software packages will not be accepted. If you need to use software (for example, Excel) and /or online or hand-held calculators to aid in your calculation, please cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 200 total points.

## STAT 200 Final Exam

STAT 200 Final Exam 100% Correct Answers in \$34 only

1. True or False. Justify for full credit. (25 pts)

(a) The normal distribution curve is always symmetric to its mean.

(b) If the variance from a data set is zero, then all the observations in this data set are identical.

(c) . of complement the is where, 1) AND(AA A APc c

(d) In a hypothesis testing, if the p-value is less than the significance level α, we do not have sufficient evidence to reject the null hypothesis.

(e) The volume of milk in a jug of milk is 128 oz. The value 128 is from a discrete data set.