Stat-2160-145 homework 6 business statistics

Quiz Submissions - Homework 6

Question 1
You are inquiring encircling the mediocre sum of yards Matthew Stafford throws for each amusement for the Detroit Lions. You purposelessly selecteded 29 amusements and see that the mediocre yards per amusement is 276.9 delay a banner flexuosity of 38.37 yards. You nonproduction to cause a 95% trust cessation for the penny mediocre sum of yards per amusement he throws. What is the lip of untruth for this judge?

1) 12.1208

2) 14.5952

3) 1.6463

4) 14.5725

5) 7.1251

Question 2

The possessor of a persomal phone stock nonproductioned to designate how abundant customers are inclined to lay-out on the dissipation of a new phone. In a purposeless scantling of 15 phones dissipationd that day, the scantling medium was $429.888 and the banner flexuosity was $21.1186. Weigh a 99% trust cessation to judge the mediocre compensation customers are inclined to pay per phone.

1) ( 426.911 , 432.865 )

2) ( 413.819 , 445.957 )

3) ( 424.435 , 435.341 )

4) ( 413.656 , 446.12 )

5) ( -413.656 , 446.12 )

Question 3

In a knot of 18 youthful professionals thoughtful, it was institute that they dissipationd on mediocre $219.838 per month eating meals accomplishing beyond the residence, delay a banner flexuosity of $37.6396. What is the 95% trust cessation of the penny whole of capital youthful professionals lay-out monthly on meals accomplishing beyond the residence?

1) ( 210.966 , 228.71 )

2) ( 201.12 , 238.556 )

3) ( -201.12 , 238.556 )

4) ( 201.198 , 238.478 )

5) ( 217.728 , 221.948 )

Question 4

The possessor of a persomal golf road nonproductioned to designate the mediocre age (in years) of the golfers that indicateed on the road. In a purposeless scantling of 30 golfers that visited his road, the scantling medium was 46.3 years old and the banner flexuosity was 6.81 years. Using this notice, the possessor fitted the trust cessation of (42.9, 49.7) delay a trust raze of 99% for the mediocre age. Which of the subjoined is an misspend explanation of this trust cessation?

1) We are 99% sanguine that the mediocre age of all golfers that indicate on the golf road is betwixt 42.9 and 49.7 years old.

2) We are 99% sanguine that the mediocre age of the golfers surveyed is betwixt 42.9 and 49.7 years old.

3) We are undoubtful that 99% of the mediocre ages of all golfers accomplish be betwixt 42.9 and 49.7 years old.

4) We are 99% sanguine that the interrelationship of the ages of all golfers is betwixt 42.9 and 49.7 years old.

5) We cannot designate the adapted explanation of this cessation.

Question 5

A persomal pizza fix vindications that they mediocre a endowment term of 7.75 minutes. To proof this vindication, you prescribe 14 pizzas balance the present month at purposeless terms on purposeless days of the week. You weigh that the mediocre endowment term is 8.68 minutes delay a banner flexuosity of 1.382 minutes. You cause a 90% trust cessation of (8.03, 9.33). Of those listed adown, what is the best omission you can establish?

1) You are 90% sanguine that the mediocre endowment term is important than 7.75 minutes.

2) You are 90% sanguine that the mediocre endowment term is less than 7.75 minutes.

3) The percentage of pizzas that reach encircling 7.75 minutes is 90%.

4) The mediocre endowment term does not suggestively be-unlike from 7.75 minutes.

5) We cannot designate the adapted explanation naturalized on the notice dedicated.

Question 6

As an avid golfer, you nonproduction to judge your mediocre beak for 18 holes of golf. Suppose you recognize that the banner flexuosity of your beak is 24.621 strokes and you nonproduction to perceive a scantling medium that is delayin 6.271 strokes of your penny mediocre for all rounds of golf delay 99% trust. How numerous rounds would you demand to indicate to designate this?Incorrect Response

1) 102Correct Answer

2) 103

3) 108

4) 113

5) We do not enjoy ample notice to confutation this topic since we were not dedicated the scantling medium.

Question 7

In a consumer examination examine, various Meijer and Walmart stocks were surveyed at purposeless and the mediocre basket compensation was recorded for each. It was institute that the mediocre basket compensation for 35 Meijer stocks was $51.376 delay a banner flexuosity of $12.892. Similarly, 49 Walmart stocks had an mediocre basket compensation of $51.138 delay a banner flexuosity of $14.332. If a 95% trust cessation for the be-unlikeence betwixt the penny mediocre basket compensations of Meijer versus Walmart is fitted, what is the lip of untruth? You can pretend that the banner flexuositys of the two populations are statistically correspondent.

1) 5.966

2) 5.064

3) 1.98931856

4) 6.055

5) 3.04377454

Question 8

It is believed that using a just specify throng (SSD) in a computer results in faster boot terms when compared to a computer delay a oral dense disk (HDD). You scantling 15 computers delay an HDD and still n ess a scantling mediocre of 20.656 seconds delay a banner flexuosity of 4.1958 seconds. A scantling of 10 computers delay an SSD profession an mediocre of 14.939 seconds delay a banner flexuosity of 2.806 seconds. Construct a 99% trust cessation for the be-unlikeence betwixt the penny mediocre boot terms of the two forms of dense throngs. Pretend the be-unlikeence accomplish indicate (HDD-SSD) and that the population banner flexuositys are statistically the similar.

1) (1.46, 9.974)

2) (-10.096, 21.53)

3) (1.811, 9.623)

4) (4.201, 7.233)

5) We singly enjoy the scantling mediums, we demand to recognize the population mediums in prescribe to weigh a trust cessation.

Question 9

A pharmaceutical conway is proofing a new refuse to extension memorization force. It takes a scantling of men-folks and splits them purposelessly into two knots. One knot is administered the refuse, and the other is dedicated a fixbo. Subjoined the refuse victuals is completed, all members of the examine are dedicated a proof for memorization force delay loftier beaks indicateing a meliorate force to memorize. You are presented a 90% trust cessation for the be-unlikeence in population medium beaks (delay refuse - delayout refuse) of (-17.5, -4.5). What can you terminate from this cessation?

1) We are 90% sanguine that the mediocre memorization force of those on the refuse is loftier than those who are not on the refuse.

2) There is no suggestive be-unlikeence betwixt the mediocre memorization abilities for those on the refuse compared to those not on the refuse.

3) We are 90% sanguine that the mediocre memorization force of those not on the refuse is loftier than those who are on the refuse.

4) We are 90% sanguine that the be-unlikeence betwixt the two scantling mediums falls delayin the cessation.

5) We do not enjoy ample notice to establish a omission.

Question 10

 The possessor of a persomal golf road nonproductions to judge the be-unlikeence betwixt the mediocre ages of males and females that indicate on the golf road. He purposelessly scantlings 30 men and 22 women that indicate on his road. He perceives the mediocre age of the men to be 34.666 delay a banner flexuosity of 8.002. The mediocre age of the women was 36.618 delay a banner flexuosity of 7.828. He uses this notice to weigh a 95% trust cessation for the be-unlikeence in mediums, (-6.424, 2.52). The best explanation of this cessation is which of the subjoined specifyments?

1) We are 95% sanguine that the be-unlikeence betwixt the mediocre age of all men and all women who indicate golf at the road is betwixt -6.424 and 2.52

2) We do not recognize the population mediums so we do not enjoy ample notice to establish an explanation.

3) We are undoubtful that the be-unlikeence betwixt the mediocre age of all men and all women is betwixt -6.424 and 2.52.

4) We are 95% sanguine that the be-unlikeence betwixt the mediocre age of the men and women surveyed is betwixt -6.424 and 2.52

5) We are 95% fast that the mediocre age be-unlikeence betwixt all males and females is betwixt -6.424 and 2.52.

Question 11

Researchers at the urbane employment of an airline miracle if there is a suggestive be-unlikeence betwixt the absorb of a departure on Priceline.com vs. the airline's own website. A purposeless scantling of 29 departures were tracked on Priceline and the airline's website and the medium be-unlikeence in compensation (Priceline - Airline Site) was $-55.175 delay a banner flexuosity of $12.403. If you nonproductioned to cause a 95% trust cessation for the penny mediocre be-unlikeence in absorbs betwixt the vendors, what is the lip of untruth?

1) 4.7178

2) 2.3032

3) 4.7105

4) 3.9134

5) 4.5142

Question 12

A restaurant nonproductions to proof a new in-stock marketing design in a little sum of stocks precedently rolling it out nationwide. The new ad promotes a douceur imbibe that they nonproduction to extension the sales of. 10 locations are chosen at purposeless and the sum of imbibes sold are recorded for 2 months precedently the new ad belligerence and 2 months subjoined. The mediocre be-unlikeence in the sales share (subjoined - precedently) is -108.801 delay a banner flexuosity of 48.8204. Weigh a 95% trust cessation to judge the penny mediocre be-unlikeence in nationwide sales share precedently the ad belligerence and subjoined.

1) (-143.725, -73.877)

2) (143.725, -73.877)

3) (-124.2394, -93.3626)

4) (-111.0632, -106.5388)

5) (-143.1998, -74.4022)

Question 13

Researchers in the urbane employment of an airline miracle if there is a suggestive be-unlikeence betwixt the absorb of a departure on Priceline.com vs. the airline's own website. A purposeless scantling of 17 departures were tracked on Priceline and the airline's website and the 90% trust cessation for the medium be-unlikeence in compensation (Priceline - Airline Site) was (-183.62, -91.37). Which of the subjoined is the misspend omission?

1) We are 90% sanguine that the mediocre be-unlikeence in compensation is indisputable, delay the loftier compensation future from Priceline.

2) We are 90% sanguine that the mediocre be-unlikeence in compensation is denying, delay the loftier compensation future from the Airline sites

3) There is no suggestive be-unlikeence betwixt the mediocre compensation for the booking options

4) We are 90% sanguine that the mediocre be-unlikeence in compensation is indisputable, delay the loftier compensation future from the Airline sites

5) We are 90% sanguine that the mediocre be-unlikeence in compensation is denying, delay the loftier compensation future from Priceline.

Question 14

Automobile manufacturers are assiduous in the be-unlikeence in reaction terms for throngrs reacting to oral incandescent thoughtlesss and to LED thoughtlesss. A scantling of 22 throngrs are told to throng a molehill as shortly as they see a thoughtless sparkle in face of them and the reaction term was measured in milliseconds. Each throngr was professionn each form of thoughtless. The mediocre be-unlikeence in reaction terms (oral - LED) is 0.1 ms delay a banner flexuosity of 5.27 ms. A 95% trust cessation for the mediocre be-unlikeence betwixt the two reaction terms was (-2.24, 2.44). Which of the subjoined is the best explanation?

1) We are undoubtful the mediocre be-unlikeence in reaction terms betwixt the two thoughtless forms for all throngrs is betwixt -2.24 and 2.44.

2) We are 95% sanguine that the mediocre be-unlikeence in the reaction terms of the throngrs scantlingd is betwixt -2.24 and 2.44.

3) We are 95% sanguine that the mediocre be-unlikeence in reaction term betwixt the two thoughtless forms for all throngrs is betwixt -2.24 and 2.44.

4) We are 95% sanguine that the be-unlikeence betwixt the mediocre reaction term for LED thoughtlesss and the mediocre reaction term for oral thoughtlesss is betwixt -2.24 and 2.44.

5) The interrelationship of all throngrs that had a be-unlikeence in reaction terms betwixt the two thoughtlesss is 95%.

Attempt Score:14 / 14 - A

Overall Grade (mediocre of all attempts):14 / 14 

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