Question
In: Statistics and Probability
A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak...
A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak AA batteries is ( 480, 520 ). Assume that this result is based on a sample of size 25
a. value of sample standard deviation
b. 99% confidence interval
c. If the confidence interval (482.6156 ,517.3844) is obtained from the same sample data, what is the degree of confidence?
Solutions
qa
orchestra answered 1 year agoRelated Solutions
A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak...
A 90 % confidence interval (a t interval) for the mean
lives (in minutes) of Kodak AA batteries is ( 410, 470 ). Assume
that this result is based on a sample of size 15 .
2) What is the value of the sample standard deviation?
66.2785
65.9677
86.6694
86.3843
3) Construct the 99% confidence interval.
(389.2961,490.7039)
(395.2976,484.7024)
(414.8193,465.1807)
(417.1658,462.8342)
Tries 0/2
4) If the confidence interval (414.0575 ,465.9425) is obtained
from the same sample data, what is the degree...
A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak...
A 90 % confidence interval (a t interval) for the mean
lives (in minutes) of Kodak AA batteries is ( 400, 440 ). Assume
that this result is based on a sample of size 25 .
1) What is the value of the sample mean?
Incorrect 440
Correct: 420
Incorrect 415
Incorrect 425
Incorrect 410
You are correct.
Your receipt no. is 159-3963
Previous Tries
2) What is the value of the sample standard deviation?
58.4494
75.8820
75.9679
58.5432
Tries...
A researcher is interested in finding a 90% confidence interval for the mean number minutes students...
A researcher is interested in finding a 90% confidence interval
for the mean number minutes students are concentrating on their
professor during a one hour statistics lecture. The study included
128 students who averaged 42.3 minutes concentrating on their
professor during the hour lecture. The standard deviation was 10.7
minutes. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a _____ (t? or z?)
distribution.
b. With 90% confidence the population mean minutes of...
A 90% confidence interval for a population mean, μ, is given as (21.73, 24.64). This confidence...
A 90% confidence interval for a population mean, μ, is given as
(21.73,
24.64). This confidence interval is based on a simple random sample
of 41
observations. Calculate the sample mean and standard deviation.
Assume
that all conditions necessary for inference are satisfied. Use the
t-
distribution in any calculations.
Find a 90% confidence interval for the mean volume of the filled bottle contents.
SCENARIO 8-12The Three Brothers Energy Drink Company bottles and distributes a
popular drink for athletes and exercise enthusiasts. Because of its
marketing successes the company has installed an additional filling
machine and the managers are eager to use it in daily operations.
The machine is set to fill bottles at 16 oz.However, we know there is inherent machine variability and quality
control has determined through testing a mean of 16.2 oz. and a
standard deviation of 0.3 oz. using a...
You are interested in finding a 90% confidence interval for the mean number of visits for...
You are interested in finding a 90% confidence interval for the
mean number of visits for physical therapy patients. The data below
show the number of visits for 15 randomly selected physical therapy
patients. Round answers to 3 decimal places where possible.
13
26
16
13
6
27
26
6
13
25
6
11
20
14
16
a. To compute the confidence interval use a ? z
t distribution.
b. With 90% confidence the population mean number of visits per
physical...
You are interested in finding a 90% confidence interval for the mean number of visits for...
You are interested in finding a 90% confidence interval for the
mean number of visits for physical therapy patients. The data below
show the number of visits for 12 randomly selected physical therapy
patients. Round answers to 3 decimal places where possible.
5
12
18
17
28
9
10
6
16
28
5
13
b. With 90% confidence the population mean number of visits per
physical therapy patient is between and
visits.
c. If many groups of 12 randomly selected physical...
You are interested in finding a 90% confidence interval for the mean number of visits for...
You are interested in finding a 90% confidence interval for the
mean number of visits for physical therapy patients. The data below
show the number of visits for 13 randomly selected physical therapy
patients. Round answers to 3 decimal places where possible. 19 19
14 13 26 19 5 14 17 27 13 20 28 a. To compute the confidence
interval use a distribution. b. With 90% confidence the population
mean number of visits per physical therapy patient is between...
The mayor is interested in finding a 90% confidence interval for the mean number of pounds...
The mayor is interested in finding a 90% confidence interval for
the mean number of pounds of trash per person per week that is
generated in city. The study included 248 residents whose mean
number of pounds of trash generated per person per week was 34.6
pounds and the standard deviation was 8.1 pounds.
a. To compute the confidence interval use a ? t
z distribution.
b. With 90% confidence the population mean number of pounds per
person per week is...
The mayor is interested in finding a 90% confidence interval for the mean number of pounds...
The mayor is interested in finding a 90% confidence interval for
the mean number of pounds of trash per person per week that is
generated in the city. The study included 195 residents whose mean
number of pounds of trash generated per person per week was 32.4
pounds and the standard deviation was 7.9 pounds. Round answers to
3 decimal places where possible.
a. To compute the confidence interval use a z or
t distribution.
b. With 90% confidence the population...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Explain the use of neural networking modeling in predictive analytics.
- Current Market Mix of Netflix, as detail as possible, please.
- This is all one question, thank you so much in advance! You must evaluate a proposal...
- X Company is considering the purchase of a new processor that costs $200,000. Shipping and setup...
- There are a large number of tasks involved in information technology and programming, and many of...
- Using one quantitative and one qualitative health policy research method described in this chapter, design a...
- What is the Rawls' solution to the age-old question of social (economic / distributive) justice?...
ADVERTISEMENT