Question
In: Statistics and Probability
A sample of 11 discount brokers showed a sample mean price charged for a trade of...
A sample of 11 discount brokers showed a sample mean price charged for a trade of 100 shares at $50 per share was $35.80. Assume a population standard deviation of $6.40. Test the hypothesis that the mean price charged for a trade of 100 shares at $50 per share is at most $32 at a=0.0500. For the hypothesis stated above 1. What is the test statistic? (Answer must be typed to either 2 or 3 decimals depending on whether the Z table is appropriate). 2. What is the decision? Either A or B? A. Reject H0 B. Fail to reject H0 3. What is the p value ? Fill in only ONE of the following statements. A. If the Z table is appropriate, p value = ___ B. If the t table is appropriate, ___ < p-value < ___
Solutions
orchestra answered 2 years agoRelated Solutions
3. [10 marks] A sample survey of 54 discount brokers showed that the mean price charged...
3.
[10 marks] A
sample survey of 54 discount brokers showed that the mean
price charged for a
trade of 100
shares at $50 per share was $33.77 and a sample standard deviation
of $15.
a.
[3] Develop a 95% confidence interval for
the mean price charged by discount brokers for a trade of 100
shares at $50 per share.
b. [2]
Explain, in context, what the interval you found tells
you.
c. [3]
What sample size would be necessary...
A sample of 150 homes for sale in ABC City showed a mean asking price of...
A sample of 150 homes for sale in ABC City showed a mean asking
price of $233,000, but the city claimed that the mean asking price
for the population was $255,000. The population standard deviation
of all homes for sale was $11,000. Use the p-value approach to
conduct a full hypothesis test (all steps) that can be used to
determine whether the mean asking price is significantly less than
$255,000. Let α = .10.
A random sample of 11 men’s pulse rates showed a mean of 71.7 beats per minute...
A random sample of 11 men’s pulse rates showed a mean of 71.7
beats per minute and a standard deviation of 15.7. Assume that
pulse rates are normally distributed. Use the table to find a 90%
confidence interval for the population mean pulse rate of
mean.
A some association On-Line Discount Broker Survey polls members on their experiences with discount brokers. As...
A some association On-Line Discount Broker Survey polls members
on their experiences with discount brokers. As part of the survey,
members were asked to rate the quality of the speed of execution
with their broker as well as provide an overall satisfaction rating
for electronic trades. Possible responses (scores) were no opinion
(0), unsatisfied (l), somewhat satisfied (2), satisfied (3), and
very satisfied (4). For each broker summary scores were computed by
calculating a weighted average of the scores provided...
A some association On-Line Discount Broker Survey polls members on their experiences with discount brokers. As...
A some association On-Line Discount Broker Survey polls members
on their experiences with discount brokers. As part of the survey,
members were asked to rate the quality of the speed of execution
with their broker as well as provide an overall satisfaction rating
for electronic trades. Possible responses (scores) were no opinion
(0), unsatisfied (l), somewhat satisfied (2), satisfied (3), and
very satisfied (4). For each broker summary scores were computed by
calculating a weighted average of the scores provided...
A some association On-Line Discount Broker Survey polls members on their experiences with discount brokers. As...
A some association On-Line Discount Broker Survey polls members
on their experiences with discount brokers. As part of the survey,
members were asked to rate the quality of the speed of execution
with their broker as well as provide an overall satisfaction rating
for electronic trades. Possible responses (scores) were no opinion
(0), unsatisfied (l), somewhat satisfied (2), satisfied (3), and
very satisfied (4). For each broker summary scores were computed by
calculating a weighted average of the scores provided...
A random sample of 25 employees for the retailer showed a sample mean of 15.1 minutes...
A random sample of 25 employees for the retailer showed a sample
mean of 15.1 minutes and a standard deviation of 3 minutes. Assume
that the time spent by employees on personal phone calls is
normally distributed. Let μ denote the mean time spent by employees
spent on personal phone calls.
(a) An employee group for a national retailer
claims that the mean time spent by employees on personal phone
calls is more than 20 minutes per day. Specify the...
Some association On-Line Discount Broker Survey polls members on their experiences with discount brokers. As part...
Some association On-Line Discount Broker Survey polls members on
their experiences with discount brokers. As part of the survey,
members were asked to rate the quality of the speed of execution
with their broker as well as provide an overall satisfaction rating
for electronic trades. Possible responses (scores) were no opinion
(0), unsatisfied (l), somewhat satisfied (2), satisfied (3), and
very satisfied (4). For each broker summary scores were computed by
calculating a weighted average of the scores provided by...
A random sample of 20 purchases showed the amounts in the table (in $). The mean...
A random sample of 20 purchases showed the amounts in the table
(in $). The mean is $50.76 and the standard deviation is
$19.48
a) Construct a 80% confidence interval for the mean purchases of
all customers, assuming that the assumptions and conditions for
the confidence interval have been met.
b) How large is the margin of error?
c) How would the confidence interval change if you had assumed
that the standard deviation was known to be $20?
60.91
64.3...
A random sample of 20 purchases showed the amounts in the table (in $). The mean...
A random sample of 20 purchases showed the amounts in the table
(in $). The mean is $49.88 and the standard deviation is
$20.86.
B) What is the margin of error ?A) Construct a 80% confidence
interval for the mean purchases of all customers, assuming that
assumptions and conditions for confidence interval have been met.
(What is the confidence interval) ?
C) How would the confidence interval change if you had assumed
that the standard deviation was known to be...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella Co.,...
- Parallel Arrays This question is in MindTap Cengage Summary In this lab, you use what you...
- 5. You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella...
- JAVA Write a test program that prompts the user to enter a series of integers and...
- (2) Cite an example on how organizations like Google, Facebook, Youtube etc collect data for image...
- The legal landscape is perpetually changing. Psychologists must remain abreast of these changes to avoid potentially...
- We are evaluating a project that costs $1.68 million, has a six-year life, and has no...
ADVERTISEMENT