Question
In: Statistics and Probability
A) A company that owns a large number of grocery stores claims that customers who pay...
A) A company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed.
What is the probability that a customer using a check spends less than $90?
Express your answer as a decimal rounded to four places after the decimal point.
B)
A company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed.
What is the probability that a customer using a check spends between $80 and $85?
Express your answer as a decimal rounded to four places after the decimal point.
C)
A company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed.
The top 10% of customers using a check pay _____________ or more for groceries.
Round your answer to 2 decimal places.
D)
A company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed.
The most frugal 20% of customers pay ___________ or less for groceries.
Round your answer to the nearest hundredth.
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose data were collected on the number of customers that frequented a grocery stores on randomly...
Suppose data were collected on the number of customers that
frequented a grocery stores on randomly selected days before and
after the governor of the state declared a lock down due to COVID
19. A sample of 6 days before the lockdown were chosen as well as 6
days randomly chosen after the lock down was in place. The number
of shoppers each day were as follows:
Before lock down
After lock down
100
60
110
50
115
70
120...
Suppose data were collected on the number of customers that frequented a grocery stores on randomly...
Suppose data were collected on the number of customers that
frequented a grocery stores on randomly selected days before and
after the governor of the state declared a lock down due to COVID
19. A sample of 6 days before the lockdown were chosen as well as 6
days randomly chosen after the lock down was in place. The number
of shoppers each day were as follows:
Before lock down
After lock down
100
60
110
50
115
70
120...
Customers of a large grocery chain who are members of the chain's incentives program spend an...
Customers of a large grocery chain who are members of the
chain's incentives program spend an average of $45 per visit to the
grocery. In an attempt to try and increase the amount spent by
these regular customers at their stores, the chain institutes a new
feature of the incentives program where customers receive an extra
5% discount on groceries when they spend $50 or more. A sample of
100 customers in the program is randomly selected and it is...
A large furniture company claims that 65% of all individuals who buy chairs from its stores...
A large furniture company claims that 65% of all individuals who
buy chairs from its stores choose wood chairs, 20% choose plastic
chairs, and 15% choose metal chairs. To investigate this claim,
researchers collected data from a random sample of the company's
customers. The results were 305 wood, 121 plastic, and 74 metal.
Are the data from the sample consistent with the company's claim?
Conduct an appropriate statistical test at the 5% significance
level to support your conclusion. Make sure...
A large furniture company claims that 65% of all individuals who buy chairs from its stores...
A large furniture company claims that 65% of all individuals who
buy chairs from its stores choose wood chairs, 20% choose plastic
chairs, and 15% choose metal chairs. To investigate this claim,
researchers collected data from a random sample of the company's
customers. The results were 305 wood, 121 plastic, and 74 metal.
Are the data from the sample consistent with the company's claim?
Conduct an appropriate statistical test at the 5% significance
level to support your conclusion. Make sure...
1. A grocery store counts the number of customers who arrive during an hour. The average...
1. A grocery store counts the number of customers who arrive
during an hour. The average over a year is 29 customers per hour.
Assume the arrival of customers follows a Poisson distribution. (It
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arrives in a particular one minute period. Round your answer to 3
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2. Label each as one of the following...
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A large company which owns several farms sells potatoes grown on these farms. The company claims...
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(A)Assuming the farm's claim is true, describe the sampling
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