Suppose Mi-Young wants to estimate the mean salary for state employees in Alabama. She obtains a...
Suppose Mi-Young wants to estimate the mean salary for state employees in Alabama. She obtains a list of all state employees and randomly selects 12 of them. She plans to obtain the salaries of these 12 employees and construct a ?- confidence interval for the mean salary of all state employees in Alabama. Have the requirements for a one-sample ? ‑confidence interval for a mean been met? The requirements been met because have not the population is not normal. the sample size is too small. the population standard deviation is not known. the population is normal. the sample is not random. the population standard deviation is known. the sample is random. the sample size is large enough.
Homework Answers
The requirements for a one-sample ? ‑confidence interval for a mean has been met. The sample drawn is random. the sample values are independent and less than 10% of the total population. thus the requirement is met.
Add Answer to:
Suppose Mi-Young wants to estimate the mean salary for state
employees in Alabama. She obtains a...
Suppose that prices of Fuji apples are normally distributed. Ryan selected a simple random sample of...
Suppose that prices of Fuji apples are normally distributed. Ryan selected a simple random sample of 12 grocery stores and found that the mean price of Fuji apples at these stores was $1.84 per pound and that the standard deviation was $0.14 per pound. Ryan plans to use this information to construct a confidence interval for u, the mean price of a pound of Fuji apples. Have the requirements for a one-sample t-confidence interval been met? The requirements the population...
Suppose the math department chair at a large state university wants to estimate the average overall...
Suppose the math department chair at a large state university wants to estimate the average overall rating, out of five points, that students taking Introductory Statistics gave their lecturers on their end-of-term evaluations. She selects a random sample of 32 evaluations and records the summary statistics shown. Sample size Sample mean Sample standard deviation Population standard deviation Standard error Confidence level ? ?⎯⎯⎯ ? ? ??⎯⎯⎯⎯ ? 32 3.9102 1.0809 1.0213 0.1805 95% The department chair determines the standard error...
Suppose the math department chair at a large state university wants to estimate the average overall...
Suppose the math department chair at a large state university wants to estimate the average overall rating, out of five points, that students taking Introductory Statistics gave their lecturers on their end-of-term evaluations. She selects a random sample of 36 evaluations and records the summary statistics shown. Sample size Sample mean Sample standard deviation Population standard deviation Standard deviation of ?¯ Confidence level ? ?⎯⎯⎯ ? ? ??⎯⎯⎯⎯ ? 36 3.8711 1.0755 1.0222 0.1704 95% The department chair determines the...
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed....
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed. Standard deviation = 10 In a random sample of 31 graduates, the mean starting salary was 61.8 and the standard deviation was 12. 1. What is the lower (smaller) endpoint of the 90% confidence interval for the population mean? 2. What is the upper (larger) endpoint of the 90% confidence interval for the population mean? 3. If null hypothesis = 60 and alternate hypothesis...
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two...
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two random samples of high school teachers are shown to the right. Also shown are the population standard deviations. 44 49 $6,525 $6,877 deviation a. Construct a 95% confidence interval to estimate the difference in the average salaries of the high school teachers in these two states b. Based on the results in part a, can you conclude that a difference exists in the average...
Suppose that Drake works for a research institute in Greenland and is given the job of treating w...
Suppose that Drake works for a research institute in Greenland and is given the job of treating wild polar bears there for hypothyroidism using medicated darts. The appropriate dosage depends on the bear's mass. Eager to head into the wilderness, he prints out the statistics he needs and sets off, planning to prepare the darts along the way Two days into his trek, however, Drake spills a cup of coffee on the printout. Unwiling to admit to his boss what...
Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking...
Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking price of used entry-level road hikes advertised online in the southeastern part of the United States. He obtains a random sample of 13 online advertisements of entry level road bikes. He determines that the mean price for these 13 hikes is =5681.87 and that the sample standard deviation is s = $177.45. He uses this information to construct a 99% confidence interval for p,...
3) [20 pts] Carbon monoxide (CO) emissions for cars vary with mean 2.9 gm/mi and standard...
3) [20 pts] Carbon monoxide (CO) emissions for cars vary with mean 2.9 gm/mi and standard deviation 0.4 gm/mi. The Ponaxtiruchiranalignim Car Rental Fleet has 10 of these cars in its fleet, acquired from various (i.e., random) sources. The CO emissions follow a normal distribution. a) What is the probability that a randomly selected car from the street has a CO emission greater than 3.1 gm/mi. b) What is the probability that a randomly selected car from the fleet has...
You want to estimate the mean salary of people in a country, so you take a...
You want to estimate the mean salary of people in a country, so you take a random sample of 121 people from around the country. The sample had an average salary of 845000 dollars with population standard deviation of 500.00 dollars. Calculate the Upper Limit of the 5% confidence interval for the mean salary of the people in the country Reminder: You only need to calculate the Upper Limit of the confidence interval.
You want to estimate the mean salary of people in a country, so you take a...
You want to estimate the mean salary of people in a country, so you take a random sample of 49 people from around the country. The sample had an average salary of 8450 00 dollars with population standard deviation of 50000 dollars. Calculate the Lower Limit of the 95% confidence interval for the mean salary of the people in the country. Reminder: You only need to calculate the Lower Limit of the confidence interval
Suppose that prices of Fuji apples are normally distributed. Ryan selected a simple random sample of 12 grocery stores and found that the mean price of Fuji apples at these stores was $1.84 per pound and that the standard deviation was $0.14 per pound. Ryan plans to use this information to construct a confidence interval for u, the mean price of a pound of Fuji apples. Have the requirements for a one-sample t-confidence interval been met? The requirements the population...
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed. Standard deviation = 10 In a random sample of 31 graduates, the mean starting salary was 61.8 and the standard deviation was 12. 1. What is the lower (smaller) endpoint of the 90% confidence interval for the population mean? 2. What is the upper (larger) endpoint of the 90% confidence interval for the population mean? 3. If null hypothesis = 60 and alternate hypothesis...
State A State B $52,245 $55,021 Sample mean Sample size Population standard Salary data from two random samples of high school teachers are shown to the right. Also shown are the population standard deviations. 44 49 $6,525 $6,877 deviation a. Construct a 95% confidence interval to estimate the difference in the average salaries of the high school teachers in these two states b. Based on the results in part a, can you conclude that a difference exists in the average...
Suppose that Drake works for a research institute in Greenland and is given the job of treating wild polar bears there for hypothyroidism using medicated darts. The appropriate dosage depends on the bear's mass. Eager to head into the wilderness, he prints out the statistics he needs and sets off, planning to prepare the darts along the way Two days into his trek, however, Drake spills a cup of coffee on the printout. Unwiling to admit to his boss what...
Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking price of used entry-level road hikes advertised online in the southeastern part of the United States. He obtains a random sample of 13 online advertisements of entry level road bikes. He determines that the mean price for these 13 hikes is =5681.87 and that the sample standard deviation is s = $177.45. He uses this information to construct a 99% confidence interval for p,...
3) [20 pts] Carbon monoxide (CO) emissions for cars vary with mean 2.9 gm/mi and standard deviation 0.4 gm/mi. The Ponaxtiruchiranalignim Car Rental Fleet has 10 of these cars in its fleet, acquired from various (i.e., random) sources. The CO emissions follow a normal distribution. a) What is the probability that a randomly selected car from the street has a CO emission greater than 3.1 gm/mi. b) What is the probability that a randomly selected car from the fleet has...
You want to estimate the mean salary of people in a country, so you take a random sample of 121 people from around the country. The sample had an average salary of 845000 dollars with population standard deviation of 500.00 dollars. Calculate the Upper Limit of the 5% confidence interval for the mean salary of the people in the country Reminder: You only need to calculate the Upper Limit of the confidence interval.
You want to estimate the mean salary of people in a country, so you take a random sample of 49 people from around the country. The sample had an average salary of 8450 00 dollars with population standard deviation of 50000 dollars. Calculate the Lower Limit of the 95% confidence interval for the mean salary of the people in the country. Reminder: You only need to calculate the Lower Limit of the confidence interval
Most questions answered within 3 hours.
-
One student ran a TLC of an unknown compound on a
silica gel plate and the...
asked 6 seconds ago -
Use inheritance to create a new class AudioRecording
based on Recording class that:
it will retain...
asked 5 minutes ago -
In the long run, an increase in the quantity of money ________
the value of money...
asked 11 minutes ago -
In February 2008, a team of Canadian scientists revealed rare
new horseshoe crab fossils from 445...
asked 16 minutes ago -
a firm produces output according to the following function q=
f(L,K) = L^1/2K^3/2. The cost of...
asked 14 minutes ago -
Please
NO HANDWRITING
NO COPY & PASTE from the internet
On March 6, 2019, Mark Zuckerberg...
asked 15 minutes ago -
Please make a JAVA program for the following using switch
structures
Write a program that simulates...
asked 18 minutes ago -
in
2011, real gdp in the united states was below potential gdp. This
fact definitely means...
asked 20 minutes ago -
Describe how the file manager allocates a file to a single user.
List the steps that...
asked 44 minutes ago -
For the following reaction:
IBr(g) + 4F2(g) → IF5(g) +
BrF3(g)
Compound
ΔH°f (kJ mol-1)...
asked 45 minutes ago -
Assuming the simple probability of even A is given as P(A) and
the simple probability of...
asked 48 minutes ago -
2.- It is known that 20% of the students on campus are smokers.
If 8 students...
asked 48 minutes ago