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The owner of a gasoline station wants to determine i# the average amount of gasoline purchased...
THE OWNER OF A GASOLINE STATION WANTS TO STUDY GASOLINE PURCHASING HABITS OF MOTORISTS AT HIS STATION. HE SELECTS A RANDOM SAMPLE OF 60 MOTORISTS DURING A CERTAIN WEEK, WITH THE FOLLOWING RESULTS: THE...
THE OWNER OF A GASOLINE STATION WANTS TO STUDY GASOLINE PURCHASING HABITS OF MOTORISTS AT HIS STATION. HE SELECTS A RANDOM SAMPLE OF 60 MOTORISTS DURING A CERTAIN WEEK, WITH THE FOLLOWING RESULTS: THE AMOUNT PURCHASED WAS A SAMPLE MEAN = 11.3 GALLONS; S = 3.1 GALLONS. ELEVEN MOTORISTS PURCHASED PREMIUM-GRADE GASOLINE. FIND: AT THE 0.05 LEVEL OF SIGNIFICANCE , IS THERE EVIDENCE THAT THE POPULATION MEAN PURCHASED WAS DIFFERENT FROM 10 GALLONS ?
A local gasoline dealership in a small town wants to estimate the average amount of gasoline...
A local gasoline dealership in a small town wants to estimate
the average amount of gasoline that people in that town use in a
1-week period. The dealer asked 44 randomly selected customers to
keep a diary of their gasoline usage, and this information produced
the following data on gas used (in gallons) by these people during
a 1-week period.
Construct a 95% confidence
interval for the average weekly gas usage by people in this town.
Use the t distribution....
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a...
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a gas station Suppose that the mean value and standard deviation of X are 11.5 and 4.0, respect viely. a. In a sample of 50 randomly selected customers, what is the approximate probability that the sample mean amount purchase is at least 12 gallons? b. In a sample of 50 randomly selected customers, what is the probability that the total amount of gasoline purchase is...
5. The amount of regular unleaded gasoline purchased every week at a gas station near WSU...
5. The amount of regular unleaded gasoline purchased every week at a gas station near WSU follows a normal distribution with mean 50000 gallons and standard deviation 10000 gallons. The starting supply of gasoline is 74000 gallons, and there is a scheduled weekly delivery of 47000 gallons. a) Find the probability that, after 11 weeks, the supply of gasoline will be below 20000 gallons.
Name : The owner of a specialty coffee shop wants to study coffee purchasing habits of...
Name : The owner of a specialty coffee shop wants to study coffee purchasing habits of customers of her shop. She selects a random sample of 60 customers during a certain week, with the following results. Amount spent: 7.25. S - $1.75 31 customers say they "definitely will" recommend the specialty coffee shop to family and friends. a) At the .05 level of significance is there evidence that the population mean amount spent by all of her customers is different...
Question 9 (1 point) The owner of a golf course wants to determine if his golf...
Question 9 (1 point) The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 10 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 10 golfers play a round of golf on his friend's course and records their scores again. The average! difference in the scores (treated as the scores on his course...
The owner of a golf course wants to determine if his golf course is more difficult...
The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 11 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 11 golfers play a round of golf on his friend's course and records their scores again. The average difference in the scores (treated as the scores on his course - the scores on...
The owner of an Italian restaurant has redesigned the menu and wants to see if the amount custome...
The owner of an Italian restaurant has redesigned the menu and wants to see if the amount customers spend (on average) will be greater with the new menu. He records the sales the week before the change and the sales the week after the change. Using the sample means and standard deviations for the two weeks, which statistical inference should he perform? A. a t test for paired samples (using differences) B. the owner should compute the mean dining bill...
1. The owner of a specialty coffee shop wants to study coffee purchasing habits of customers...
1. The owner of a specialty coffee shop wants to study coffee purchasing habits of customers of her shop. She selects a random sample of 60 customers during a certain week, with the following results. _ Amount spent: X = $7.25, S = $1.75 31 customers say they “definitely will” recommend the specialty coffee shop to family and friends. At the .10 level of significance, is there evidence that more than 50% of all her customers “definitely will” recommend the specialty coffee shop...
ror the following problems, show all work AND clearly state your conclusion. Use the method that...
ror the following problems, show all work AND clearly state your conclusion. Use the method that requested for each problem, each problem is worth 2 points. 1. Since many people have trouble programming their home electronics, an electronics company na developed a set of instructions they hope will be easier. The goal is to have at least 96% of customers report they found the programming 'easy. The company tests it on 200 people, 194 of them reported easy. At the...
A local gasoline dealership in a small town wants to estimate
the average amount of gasoline that people in that town use in a
1-week period. The dealer asked 44 randomly selected customers to
keep a diary of their gasoline usage, and this information produced
the following data on gas used (in gallons) by these people during
a 1-week period.
Construct a 95% confidence
interval for the average weekly gas usage by people in this town.
Use the t distribution....
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a gas station Suppose that the mean value and standard deviation of X are 11.5 and 4.0, respect viely. a. In a sample of 50 randomly selected customers, what is the approximate probability that the sample mean amount purchase is at least 12 gallons? b. In a sample of 50 randomly selected customers, what is the probability that the total amount of gasoline purchase is...
5. The amount of regular unleaded gasoline purchased every week at a gas station near WSU follows a normal distribution with mean 50000 gallons and standard deviation 10000 gallons. The starting supply of gasoline is 74000 gallons, and there is a scheduled weekly delivery of 47000 gallons. a) Find the probability that, after 11 weeks, the supply of gasoline will be below 20000 gallons.
Name : The owner of a specialty coffee shop wants to study coffee purchasing habits of customers of her shop. She selects a random sample of 60 customers during a certain week, with the following results. Amount spent: 7.25. S - $1.75 31 customers say they "definitely will" recommend the specialty coffee shop to family and friends. a) At the .05 level of significance is there evidence that the population mean amount spent by all of her customers is different...
Question 9 (1 point) The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 10 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 10 golfers play a round of golf on his friend's course and records their scores again. The average! difference in the scores (treated as the scores on his course...
ror the following problems, show all work AND clearly state your conclusion. Use the method that requested for each problem, each problem is worth 2 points. 1. Since many people have trouble programming their home electronics, an electronics company na developed a set of instructions they hope will be easier. The goal is to have at least 96% of customers report they found the programming 'easy. The company tests it on 200 people, 194 of them reported easy. At the...
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