Question
In: Statistics and Probability
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume the population standard deviation for those drinking regular coffee is 1.29 cups per day and 1.44 cups per day for those drinking decaffeinated coffee. A random sample of 55 regular-coffee drinkers showed a mean of 4.41 cups per day. A sample of 47 decaffeinated-coffee drinkers showed a mean of 5.16 cups per day.
Use the 0.01 significance level.
-
Is this a one-tailed or a two-tailed test?
-
One-tailed test.
-
Two-tailed test.
-
State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
-
Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
-
What is the p-value?
-
What is your decision regarding H0?
-
Reject H0.
-
Do not reject H0.
Solutions
orchestra answered 1 year agoRelated Solutions
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
decaffeinated-coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.45 cups per day
and 1.59 cups per day for those drinking decaffeinated coffee. A
random sample of 51 regular-coffee drinkers showed a mean of 4.30
cups per day. A sample of 47 decaffeinated-coffee drinkers showed a
mean of 4.89 cups per day. Use the 0.010 significance level....
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
decaffeinated-coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.36 cups per day
and 1.49 cups per day for those drinking decaffeinated coffee. A
random sample of 46 regular-coffee drinkers showed a mean of 4.50
cups per day. A sample of 37 decaffeinated-coffee drinkers showed a
mean of 5.05 cups per day.
Use the 0.025 significance level....
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
decaffeinated-coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.39 cups per day
and 1.55 cups per day for those drinking decaffeinated coffee. A
random sample of 45 regular-coffee drinkers showed a mean of 4.59
cups per day. A sample of 39 decaffeinated-coffee drinkers showed a
mean of 5.19 cups per day.
Use the 0.050 significance level....
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
decaffeinated-coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.21 cups per day
and 1.40 cups per day for those drinking decaffeinated coffee. A
random sample of 54 regular-coffee drinkers showed a mean of 4.59
cups per day. A sample of 49 decaffeinated-coffee drinkers showed a
mean of 5.64 cups per day. Use the 0.100 significance level....
A coffee manufacturer is interested in whether the mean daily consumption of regular- coffee drinkers is...
A coffee manufacturer is interested in whether the mean daily
consumption of regular- coffee drinkers is less than that of
decaffeinated coffee drinkers. Assume the population standard
deviation for those drinking regular coffee is 1.21 cups per day
and 1.40 for those drinking decaffeinated coffee. A random sample
of 54 regular coffee drinkers showed a mean of 4.59 cups per day. A
sample of 49 decaffeinated coffee drinkers showed a mean of 5.64
cups per day.
a) Is this a...
George enjoys drinking coffee everyday. The following utility function describes his preferences for daily coffee consumption:...
George enjoys drinking coffee everyday. The following utility
function describes his preferences for daily coffee consumption:
u(x) = min{5x,20}where x is the number of coffee drinks he has that
day. Assume each drink costs 2. Which statement is incorrect?
(a) His reservation price for the first drink is 5.
(b) His reservation price for the fifth drink is 5.
(c) His willingness to pay for three drinks is 15.
(d) Consumer surplus is equal to 12
A nurse is interested in whether there is a relationship between daily levels of stress and...
A nurse is interested in whether there is a relationship between
daily levels of stress and likelihood of a heart attack. The stress
scores (predictor variable) and risk of heart attack values
(criterion variable) from a small sample of participants are
depicted below.
Stress
Score Risk
of Heart Attack
(Higher values = more stress) (Higher
values = greater risk)
1 9
5 8
2 6
5 8
Set up the regression equation and use to predict the risk of heart
attack for a person with...
Suppose that you are interested in determining whether "consumption depends on income" or whether "income depends...
Suppose that you are interested in determining whether
"consumption depends on income" or whether "income depends on
consumption." Which of the following would be most
relevant?
Group of answer choices
t-test
F-test
Chi-square test
double-blind test
Granger test
A researcher is interested in whether the phonics method of teaching reading is more or less...
A researcher is interested in whether the phonics method of
teaching reading is more or less effective than the sight method,
depending on what grade the child is in. Twenty children were
randomly selected from each of three grades: kindergarten (K),
first grade (1), and second grade. Achievement was measured in
terms of reading comprehension where higher scores indicate better
comprehension. Within each grade, 10 children were assigned to each
of two methods of teaching reading - phonics or sight....
A researcher is interested in whether the phonics method of teaching reading is more or less...
A researcher is interested in whether the phonics method of
teaching reading is more or less effective than the sight method,
depending on what grade the child is in. Twenty children were
randomly selected from each of three grades: kindergarten (K),
first grade (1), and second grade. Achievement was measured in
terms of reading comprehension where higher scores indicate better
comprehension. Within each grade, 10 children were assigned to each
of two methods of teaching reading - phonics or sight....
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- . Use the following information to calculate your company's expected return State Probability Return Boom 20%...
- You are considering the following two projects and can only take one. Your cost of capital...
- C++: Write a program that produces truth tables for the following compound propositions. Write the header...
- 1. What is the historical role of investment bankers ? Has this role changed ? Why...
- How were the original Internet requirements met through its design? What are the two main requirements...
- discuss crowdfunding on platforms: What features of the services incorporate virality? What are some of the...
- A textbook of mass 2.08 kg rests on a frictionless, horizontal surface. A cord attached to...
ADVERTISEMENT