代写STAT 200 Midterm Exam #3 2024代写留学生Matlab语言程序

STAT 200

Midterm Exam #3

July 26 – 30, 2024

This exam contains 19 pages and 85 questions.  READ THE FOLLOWING INSTRUCTIONS VERY CAREFULLY!

•    You may use any resources at your disposal (textbook, notes, the internet, etc.), but you may NOT seek the assistance of another human being. This includes – but is not limited to – your classmates, Mrs. Bolton, any other faculty member at PSU or any other institution (past  or  present),  former  grade-school  teachers,  family  members  (blood  relatives  or otherwise), friends, friends of friends, the third cousin twice removed of your best friend’s older brother’s ex-girlfriend’s aunt, etc. This also prohibits the use of virtual homework help sites such as Chegg, CourseHero, etc., and the use of AI such as ChatGPT, etc. In other words, the work on this exam is to be yours and yours alone. Do not let there be reason to suspect otherwise.

•    You must submit your exam responses on the ZipGrade link provided. You may not submit a  different  format  or  version  of your  responses  unless  you  have  an  accommodation specifying this.

•    You  are required to  submit a  screenshot of your ZipGrade submission. An example is shown on Canvas for your reference.

•     This exam is to be submitted in two places by  11:59pm  (Eastern  Standard  Time) on Tuesday, July 30, 2024:

1.   your   answers   are   to   be   submitted   on   the   ZipGrade   link   provided,   and

2.   your screenshot of your submission to the “Midterm Exam 3” Quiz link on Canvas

Late exams will NOT be accepted, as you have several days over which

to find an uninterrupted time to take the exam.

SECTION 1: VOCABULARY & CONCEPTS

Circle the letter of the best response. There is only one response per question (unless otherwise indicated). Questions #1 – 15 are worth 2 points each.

1.   If the null hypothesis is not rejected when it is false, a                       error has occurred.

(A)  Type I                                                                   (C)  Type A

(B)  Type II                                                                  (D)  Type B

2.   A Type I error occurs if one rejects the null hypothesis when it is                         .

(A)  zero     (C)  true

(B)  false     (D) non-zero

3.   A Type II error occurs if one does not reject the null hypothesis when it is                         .

(A)  zero               (C)  true

(B)  non-zero         (D)  false

4.   The probability of a Type I error is represented by the symbol            .

(A) β                                                               (C)  φ

(B) η                                                               (D)  a

5.   Determine whether the alternative hypothesis indicates a left-tailed test, right-tailed test, or two-tailed test when H0: µ = 25 and Ha: µ > 25.

(A) right-tailed

(B) left-tailed

(C) two-tailed

(D) cannot be determined

6.   A                    -tailed test is used when H0: μ =  87.3 and Ha : μ > 87.3.

(A)  right                                                                      (C)  two

(B)  left                                                                       (D)  zero

7.	In a(n)                          test, the null hypothesis should be rejected when the test statistic is within either of the two critical regions. (A)  one-tailed                                                             (C)  two-sample (B)  two-tailed                                                             (D)  hypergeometric
8.	A garbage collector believes he averages picking up more than four tons of garbage per
	day.  What is the null hypothesis?
	(A) H0: ! ≠ 4 (B)  H0: ! = 4	(C)  H0: ! > 4 (D) H0: ! < 4
9.	The numerical value for z or t obtained from a statistical test is called the                              .
	(A)  critical value (B)  level of significance	(C)  test statistic (D) hypothesis
10.	The numerical value for z or t obtained from a table of values, which indicates the tail(s) of the statistical test, is called the                              .
	(A)  critical value (B)  level of significance	(C)  test statistic (D) hypothesis
11.	The                              is in complement to the confidence level for the parameter (that is,
	their values add to 100%).
	(A)  critical value (B)  level of significance	(C)  test statistic (D) hypothesis
12.	The claims being evaluated by a statistical test are the                               . (A)  critical values                                                       (C)  test statistics (B)  levels of significance                                           (D)  hypotheses

13.  When conducting a statistical test for the mean, the decision of which statistical test to

perform. (z-test or t-test) is determined by whether the                is known.

(A)  sample mean

(B)  population proportion

(C)  population standard deviation

(D)  sample size

14. When analyzing the results of the statistical test, the decision to reject H0  is made if          . (Select at most two letters, unless selecting answer choice F.)

(A)  the test statistic is within the critical region.

(B)  the test statistic is not within the critical region.

(C)  the significance level a is greater than the p-value of the test.

(D)  the confidence interval includes zero.

(E)  the significance level a is less than the p-value of the test.

(F)  None of the above.  Never reject H0, since it is always true.  (Mark A & B & C if you choose this response.)

15.  When conducting a matched pairs test, the value of interest on which the test is being

conducted is the                          .

(A) product of the proportions

(B)  sum of the standard deviations (C)  difference of the means

(D)  difference of the sample sizes