Question
The following figure portrays the appearance of a distribution of efficiency ratings for employees of Nale...
The following figure portrays the appearance of a distribution of efficiency ratings for employees of Nale Nail Works Inc.: 20 30 40 50 60 70 80 90 100 110 120 130 Efficiency rating a. Estimate the mean efficiency rating. (Round the final answer to 1 decimal place.) Mean efficiency rating b. Estimate the standard deviation. (Round the final answer to the nearest whole number.) Standard deviation c. About 68% of the efficiency ratings are between what two values? (Round the final answers to 1 decimal place.) About 68 % of the efficiency ratings are between and . d. About 95% of the efficiency ratings are between what two values? (Round the final answers to 1 decimal place.) About 95% of the efficiency ratings are between and
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like
to estimate the mean number of litres (L) of gasoline sold to his
customers. Assume the number of litres sold follows the normal
distribution with a standard deviation of 10 L. From his records,
he selects a random sample of 14 sales and finds the mean number of
litres sold is 44.
a. What is the point estimate of the population
mean? (Round the final answer to the...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like
to estimate the mean number of litres (L) of gasoline sold to his
customers. Assume the number of litres sold follows the normal
distribution with a standard deviation of 6 L. From his records, he
selects a random sample of 12 sales and finds the mean number of
litres sold is 38.
a. What is the point estimate of the population
mean? (Round the final answer to the...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like
to estimate the mean number of litres (L) of gasoline sold to his
customers. Assume the number of litres sold follows the normal
distribution with a standard deviation of 12 L. From his records,
he selects a random sample of 15 sales and finds the mean number of
litres sold is 47.
a. What is the point estimate of the population
mean? (Round the final answer to the...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like
to estimate the mean number of litres (L) of gasoline sold to his
customers. Assume the number of litres sold follows the normal
distribution with a standard deviation of 8 L. From his records, he
selects a random sample of 13 sales and finds the mean number of
litres sold is 41.
a. What is the point estimate of the population
mean? (Round the final answer to the...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to
estimate the mean number of gallons of gasoline sold to his
customers. Assume the number of gallons sold follows the normal
distribution with a population standard deviation of 1.80 gallons.
From his records, he selects a random sample of 80 sales and finds
the mean number of gallons sold is 6.70.
What is the point estimate of the population mean?
(Round your answer to 2 decimal places.)...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to
estimate the mean number of gallons of gasoline sold to his
customers. Assume the number of gallons sold follows the normal
distribution with a population standard deviation of 1.80 gallons.
From his records, he selects a random sample of 80 sales and finds
the mean number of gallons sold is 6.70.
What is the point estimate of the population mean?
(Round your answer to 2 decimal places.)...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to
estimate the mean number of gallons of gasoline sold to his
customers. Assume the number of gallons sold follows the normal
distribution with a population standard deviation of 1.80 gallons.
From his records, he selects a random sample of 80 sales and finds
the mean number of gallons sold is 6.90.
What is the point estimate of the population mean?
(Round your answer to 2 decimal places.)...
- Following are the fuel efficiency, in miles per gallon, for a sample of convertibles. Calculate...
- Following are the fuel efficiency, in miles per gallon, for a
sample of convertibles. Calculate the sample variance. 25, 23 , 25,
20, 21 Write only a number as your answer.
Round to one decimal place (for example: 8.3).
- Following are playback time, in hours, for a sample of MP3
players, Calculate the sample standard deviation.
23,35,28,18,25,21,37,28 Write only a number as your answer. Round
to two decimal place (for example: 8.32).
- Following are closing prices of...
Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All...
Condé Nast Traveler conducts an annual survey in which
readers rate their favorite cruise ship. All ships are rated on a
100-point scale, with higher values indicating better service. A
sample of 36 ships that carry fewer than 500 passengers resulted in
an average rating of 85.33, and a sample of 43 ships that carry 500
or more passengers provided an average rating of 81.3. Assume that
the population standard deviation is 4.56 for ships that carry
fewer than 500...
The accompanying table contains the service ratings of 14 different Internet and TV providers. Complete parts...
The accompanying table contains the service ratings of 14
different Internet and TV providers. Complete parts (a)
through(d) below
At the 0.01 level of significance, is there evidence of a
difference in the mean service rating between TV and
Internetservices?Let mu 1be the mean TV service rating and let mu
2 be the mean Internet service rating. State the null and
alternative hypotheses. Choose the correct answer below.
b.Determine the T Test and critical values
c. Determine the P value...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 1 minute ago
asked 14 minutes ago
asked 27 minutes ago
asked 43 minutes ago
asked 59 minutes ago
asked 59 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago