Statistics > QUESTIONS & ANSWERS > STAT 200 Week 6 Homework Problems,Full Study Guide. University Of Maryland. (All)

STAT 200 Week 6 Homework Problems,Full Study Guide. University Of Maryland.

Document Content and Description Below

Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biology exam 84,199 of them were female. In that same year, of the 211,693 studen... ts who took the calculus AB exam 102,598 of them were female ("AP exam scores," 2013). Estimate the difference in the proportion of female students taking the biology exam and female students taking the calculus AB exam using a 90% confidence level. n1=144,796 p1=84199/144796 = 0.582 q1=1-0.582 = 0.418 n2=211,693 p2=102598/211693 = 0.485 q1=1-0.485 = 0.515 zc = 1.645 E=1.645*sqrt[{(0.582*0.418)/144796}+{90.485*0.515)/211693}] E= 0.0028 (0.582-0.485)-0.0028<p1-p2<(0.582-0.485)+0.0028 0.0942<p1-p2<0.998 There is a 90% chance that 0.0942<p1-p2<0.998 contains true difference in proportions. 9.1.5 Are there more children diagnosed with Autism Spectrum Disorder (ASD) in states that have larger urban areas over states that are mostly rural? In the state of Pennsylvania, a fairly urban state, there are 245 eight year olds diagnosed with ASD out of 18,440 eight year olds evaluated. In the state of Utah, a fairly rural state, there are 45 eight year olds diagnosed with ASD out of 2,123 eight year olds evaluated ("Autism and developmental," 2008). Is there enough evidence to show that the proportion of children diagnosed with ASD in Pennsylvania is more than the proportion in Utah? Test at the 1% level. n1=18,440 x1=245 p1=245/18440 = 0.013 q1=1-0.013 = 0.987 n2=2,123 x2=45 p2=45/2123 = 0.021 q1=1-0.021 = 0.979 p-= (245+45)/(18440+2123) = 0.014 q-=1-0.014 = 0.986 z={(0.013+0.021)-0}/sqrt[{(0.014*0.986)/18440}+{(0.014*0.986)/2123}] z=12.760 9.2.3 All Fresh Seafood is a wholesale fish company based on the east coast of the U.S. Catalina Offshore Products is a wholesale fish company based on the west coast of the U.S. Table #9.2.5 contains prices from both companies for specific fish types ("Seafood online," 2013) ("Buy sushi grade," 2013). Do the data provide enough evidence to show that a west coast fish wholesaler is more expensive than an east coast wholesaler? Test at the 5% level. Table #9.2.5: Wholesale Prices of Fish in Dollars Fish All Fresh Seafood Prices Catalina Offshore Products Prices Cod 19.99 17.99 Tilapi 6.00 13.99 Farmed Salmon 19.99 22.99 Organic Salmon 24.99 24.99 Grouper Fillet 29.99 19.99 Tuna 28.99 31.99 Swordfish 23.99 23.99 Sea Bass 32.99 23.99 Striped Bass 29.99 14.99 All Fresh Seafood Prices Catalina Offshore Products Prices Fish d=x1-x2 Cod 19.99 17.99 2 Tilapi 6 13.99 -7.99 Farmed Salmon 19.99 22.99 -3 Organic Salmon 24.99 24.99 0 Grouper Fillet 29.99 19.99 10 Tuna 28.99 31.99 -3 Swordfish 23.99 23.99 0 Sea Bass 32.99 23.99 9 Striped Bass 29.99 14.99 15 Mean= 2.446 Standard Dev= 7.399 Test Stat= 0.110 df= 8 p-value= 0.542 Since p-value>0.05, accept Ho. 9.2.6 The British Department of Transportation studied to see if people avoid driving on Friday the 13 th . They did a traffic count on a Friday and then again on a Friday the 13 th at the same two locations ("Friday the 13th," 2013). The data for each location on the two different dates is in table #9.2.6. Estimate the mean difference in traffic count between the 6 th and the 13 th using a 90% level. Table #9.2.6: Traffic Count Dates 6th 13th 1990, July 139246 138548 1990, July 134012 132908 1991, September 137055 136018 1991, September 133732 131843 1991, December 123552 121641 1991, December 121139 118723 1992, March 128293 125532 1992, March 124631 120249 1992, November 124609 122770 1992, November 117584 117263 Dates 6th 13th d=x1-x2 1990, July 139246 138548 698 1990, July 134012 132908 1104 1991, September 137055 136018 1037 1991, September 133732 131843 1889 1991, December 123552 121641 1911 1991, December 121139 118723 2416 1992, March 128293 125532 2761 1992, March 124631 120249 4382 [Show More]

Last updated: 1 year ago

Preview 1 out of 11 pages

Add to cart

Instant download

document-preview

Buy this document to get the full access instantly

Instant Download Access after purchase

Add to cart

Instant download

Reviews( 0 )

$15.00

Add to cart

Instant download

Can't find what you want? Try our AI powered Search

OR

REQUEST DOCUMENT
86
0

Document information


Connected school, study & course


About the document


Uploaded On

Oct 24, 2020

Number of pages

11

Written in

Seller


seller-icon
Academia1434

Member since 4 years

211 Documents Sold


Additional information

This document has been written for:

Uploaded

Oct 24, 2020

Downloads

 0

Views

 86

Document Keyword Tags


$15.00
What is Browsegrades

In Browsegrades, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.

We are here to help

We're available through e-mail, Twitter, Facebook, and live chat.
 FAQ
 Questions? Leave a message!

Follow us on
 Twitter

Copyright © Browsegrades · High quality services·