![netflixacc0107](/avatars/23660.jpg)
netflixacc0107
13.08.2019 •
Mathematics
5. the length of time between billing dates and checks received and deposited for non-delinquent accounts of an oil company’s monthly credit card customers is 13.5 days with a standard deviation of 3 days. a bank claims if the company used a lockbox system, it could reduce the company’s average time. thirty-six (36) accounts were randomly selected and tested using the lockbox system. the average time was found to be 13 days. what is your conclusion at the 2.5% level of significance?
Solved
Show answers
More tips
- C Computers and Internet Отправляем смс через интернет: легко и просто...
- L Leisure and Entertainment The Best Film of 2010: A Look Back at the Academy Awards...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- L Leisure and Entertainment What to Bring on a Hike? Essential Items to Pack for a Safe and Enjoyable Adventure...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- S Style and Beauty Autotanning: Harmful or Safe?...
- F Food and Cooking 10 Ideas for a Wedding Anniversary Gift...
- H Health and Medicine How to Reduce Sweating in the Heat and Beyond: Say Goodbye to Excessive Sweat...
- F Food and Cooking Do Aphrodisiacs Really Work? Separating Fact from Fiction...
- H Health and Medicine What to Eat to Lose Weight?...
Answers on questions: Mathematics
- M Mathematics A: what is 7*[tex]10^{15}[/tex]? b: what is 7*[tex]10^{10}[/tex]?...
- M Mathematics Please helpp ASAP! I know the answers, but what is the work that goes along with this?...
- M Mathematics Olivia is making scarves. Each scarf will have 7 rectangles, and 5 7 of the rectangles will be purple. How many purple rectangles does she need for 2 scarves?...
- M Mathematics Hi if your 13 and want to talk on discourd comment your usernames!...
- M Mathematics City A is located in a valley 15 meters below sea level, and City B is located 43 meters above sea level. What is the difference, in meters, between the elevations...
- M Mathematics What is the solution to the equation represented in the model below? Key: = 1 1 D=-1 OI=2...
- M Mathematics Please give me the right answer. :)...
- M Mathematics Help me find the surface area ...
- M Mathematics The radius of a sphere is 12 cm. What is the volume of the sphere? Round to the nearest tenth....
- M Mathematics 4 times (12-8) + 2^3. (2 to the 3rd power)...
Ответ:
Step-by-step explanation:
Let X be the length of time between billing dates and checks received and deposited for non-delinquent accounts of an oil company’s monthly credit card customers
X has mean 13.5 and sigma 3 days
Sample size = n =36, x bar = 13
(One tailed test at 0.025 sign. level)
Mean diff = -0.5
Since sigma is known z test can be used
Std error =![\frac{\sigma}{\sqrt{n} } =0.5](/tpl/images/0174/7844/4dbdc.png)
Z statistic = -0.5/SE= -0.1
p value = 0.920
p>0.025 hence accept null hypothesis.
My conclusion is there is no statistical evidence that lock box reduced the mean time.
Ответ: