Question
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the...
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the number of customers served was 230, 235, 65, 185, 120, and 245. She believes that the number of customers served on weekdays follows a normal distribution. Construct the 99% confidence interval for the average number of customers served on weekdays. (You may find it useful to reference the t table. Round intermediate calculations to at least 4 decimal places, "sample mean" and "sample standard deviation" to 2 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.)
Homework Answers
Answer #1
| Values ( X ) |
 |
|
| 230 | 2500 | |
| 235 | 3025 | |
| 65 | 13225 | |
| 185 | 25 | |
| 120 | 3600 | |
| 245 | 4225 | |
| Total | 1080 | 26600 |
Mean 
Standard deviation 
Confidence Interval
Lower Limit = 
Lower Limit = 59.9351
Upper Limit = 
Upper Limit = 300.0649
99% Confidence interval is ( 59.94 , 300.06 )
Not the answer you're looking for?
Similar Questions
Student's t Distribution CI (PLEASE SHOW EXCEL FUNCTIONS) The manager of The Cheesecake Factory in Boston...
Student's t Distribution CI (PLEASE SHOW EXCEL FUNCTIONS)
The manager of The Cheesecake Factory in Boston would like to
know the mean number of customers served on weekdays. She believes
that the number of customers served follows a Normal distribution.
She reports that on six randomly selected weekdays an average of
158.3 customers were served with a sample standard deviation of
52.2.
(EXCEL FUNCTIONS)
a. Calculate the standard error of the sample mean. (EXCEL
FUNCTIONS)
b. Find the t-critical value...
A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of...
A hair salon in Cambridge, Massachusetts, reports that on seven
randomly selected weekdays, the number of customers who visited the
salon were 72, 55, 49, 35, 39, 23, and 77. It can be assumed that
weekday customer visits follow a normal distribution. [You
may find it useful to reference the t table.]
a. Construct the 90% confidence interval for
the average number of customers who visit the salon on weekdays.
(Round intermediate calculations to at
least 4 decimal places, "sample...
The manager of a night club in Boston stated that 90% of the customers are between...
The manager of a night club in Boston stated that 90% of the
customers are between the ages of 22 and 28 years. If the age of
customers is normally distributed with a mean of 25 years,
calculate its standard deviation. (You may find it useful
to reference the z table. Round
"z" value to 3 decimal places and final answer to 2
decimal places.)
A small hair salon in Denver, Colorado, averages about 85 customers on weekdays with a standard...
A small hair salon in Denver, Colorado, averages about 85
customers on weekdays with a standard deviation of 17. It is safe
to assume that the underlying distribution is normal. In an attempt
to increase the number of weekday customers, the manager offers a
$5 discount on 6 consecutive weekdays. She reports that her
strategy has worked since the sample mean of customers during this
6 weekday period jumps to 99.
a. What is the probability to get a sample...
Based on historical data, your manager believes that 33% of the company's orders come from first-time...
Based on historical data, your manager believes that 33% of the
company's orders come from first-time customers. A random sample of
245 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is between 0.22 and 0.39? (Enter your answer as a number
accurate to 4 decimal places.)
Based on historical data, your manager believes that 31% of the company's orders come from first-time...
Based on historical data, your manager believes that 31% of the
company's orders come from first-time customers. A random sample of
128 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is less than 0.32?
Note: You should carefully round any intermediate values you
calculate to 4 decimal places to match wamap's approach and
calculations.
Answer = (Enter your answer as a number accurate to 4 decimal
places.)
Based on historical data, your manager believes that 32% of the company's orders come from first-time...
Based on historical data, your manager believes that 32% of the
company's orders come from first-time customers. A random sample of
178 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is less than 0.29?
Note: You should carefully round any z-values you calculate to 4
decimal places to match wamap's approach and calculations.
Answer = (Enter your answer as a number accurate to 4
decimal places.)
Based on historical data, your manager believes that 32% of the company's orders come from first-time...
Based on historical data, your manager believes that 32% of the
company's orders come from first-time customers. A random sample of
178 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is less than 0.29?
Note: You should carefully round any z-values you calculate to 4
decimal places to match wamap's approach and calculations.
Answer = (Enter your answer as a number accurate to 4
decimal places.)
Based on historical data, your manager believes that 27% of the company's orders come from first-time...
Based on historical data, your manager believes that 27% of the
company's orders come from first-time customers. A random sample of
79 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is greater than than 0.3?
Note: You should carefully round any z-values you calculate to 4
decimal places to match wamap's approach and calculations.
Answer = (Enter your answer as a number accurate to 4
decimal places.)
Based on historical data, your manager believes that 45% of the company's orders come from first-time...
Based on historical data, your manager believes that 45% of the
company's orders come from first-time customers. A random sample of
123 orders will be used to estimate the proportion of
first-time-customers. What is the probability that the sample
proportion is between 0.21 and 0.48?
Note: You should carefully round any z-values you calculate to 4
decimal places to match wamap's approach and calculations.
Answer = (Enter your answer as a number accurate to 4
decimal places.)
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 8 minutes ago
asked 9 minutes ago
asked 12 minutes ago
asked 14 minutes ago
asked 25 minutes ago
asked 26 minutes ago
asked 26 minutes ago
asked 29 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago