Stat 200 week 6 quiz-2


STAT 200 QUIZ 2 WEEKS  3, 4, 5, 6  (16 @ 0.5 pts = 8 tops)

SHOW YOUR CALCULATIONS NOT SOFTWARE

SUBMIT ANSWER SHEET ONLY  NOT  THESE QUIZ PROBLEMS

1.  For a set of quantity, if the medium is similar to the median, its arrangement agency be:

 

a. Right-skewed

b. Left-skewed

c. Normally distributed

d. Positively-skewed

 

2.  In the graph, there are two distrubitions and we can ascertain (Select ALL that apportion):

 

a. The medium of arrangement A> the medium of arrangement B

b. The medium of arrangement A < the medium of arrangement B

c. The banner irregularity of arrangement A> the std irregularity of arrangement B

d. The banner irregularity of arrangement A= the st irregularity of arrangement B

 

3.  (T/F)  A BOX PLOT gives us extensive advice environing a postulates set, including the compute of postulates tops in any dedicated dispose.

 

4.  There are 20 coupons rolled up and placed after a whilein rotund malleable balls in a box. There are 3 contrariant types of coupons: 10 of them can be redeemed for “free drinks”, 5 can be redeemed for “free desserts”, and 5 can be redeemed for “free entrees”. If you shiver the box and then randomly chosen one coupon. What’s the verisimilitude that you procure get a “free entree coupon”?    (a) 25%  (b) 10%  (c) 20% (d) 50%  (e) None of these

 

5.  Mary was emiting a counterfeit. She emited three occasions. What’s the verisimilitude that at the primeval emit she gets a leader, the avoid emit she gets a subordination at and the third occasion she get a subordination? (a) 3/8  (b) 0.50  (c) 12.5% (d) 25%

 

6.  100,000 people:  twenty percent are manifestation younger and 7% of those manifestation are malnourished. How numerous manifestation malnourished?  (a)  1000   (b) 1400  (c)  1200    (d)  1600

 

7.  A recognized arrangement of postulates tops has a medium of 15 and a banner irregularity of 5. What is the bannerized Z-VALUE for a postulates top after a while a rate of 7? (a) +1.3 (b) -1.6 (c) -2.1 (d) +1.6

 

8.  In this postulates set overhead, what is the verisimilitude that a postulates top is 7 or near?

(a) 4.5%   (b) 0.095   (c) 0.055   (d) 55%

 

9.  TOSSING A COIN: Using the Recognized to trench the Binomial (NOT the abstruse formulas) after a while a  What is the verisimilitude of (binomial) postulates getting  17 to 21 leaders out of 36 emites?  THE RANGE FOR WHICH WE DETERMINE THE Z VALUES FOR THE LOW AND HIGH ENDS IS?

(a) 17 to 21 (b) 17.5 to 19.5  (c) 16 to 22  (d)  16.5 to 21.5

 

10.  What are the MEAN and Banner irregularity approximations we use for this investigation?

(a) 18 and 3   (b) 17 and 10   (c) 18 and 9   (d)  16 and 3  (e) None of these

 

11.  What are the z-Values that fit to the dispose you unshaken in #9 overhead?

(a)  +0.5 and -1.17   (b) -0.5 and +1.17  (c)  - 0.16 and +0.38  (d) none of these

 

12.  For these z-Values from #11, what are the areas (probabilites) to the LEFT ?

(a)  0.3085  and 87.9%   (b) 3.85%  and 0.0879 (c)  0.4801  and 13%  (d) 4.81% and 95.2%

 

13.  FINALLY, what is the trench verisimilitude of 17 to 21 leaders out of 35 counterfeit emites using the Recognized to trench the Binomial?

(a)  67%  (b) 57%  (c)  0.43  (d)  0.057   (e) None of these

 

14.  CONFIDENCE INTERVALS  IF WE HAVE THE MEAN BUT NOT THE STANDARD DEVATION WE USE THE _______, BUT IF WE HAVE THE MEAN AND THE STANDARD DEVAITION WE USE THE _________

(a)  z-Tables and t-Tables   (b) t-Tables and z-Tables  (c) neither, we can’t investigate a assurance cessation. 

 

15.  Using the t-Tables after a while  an α  of 5%  the Assurance Cessation would possess limits at:

(a) 5% and 95%  (b) 0.025 and 0.975  (c) 1% and 99%  (d) none of these

 

16.  Investigate the 99% Assurance Cessation for 41 pattern postulates tops after a while a medium (m) of 25 and a banner irregularity (s) of 5

(a)  21  to 29    (b) 23 to 27   (c) 24 to 26  (d)  22.5 to 27.5