Based on a random sample of 30 business students, it was found that 95% confidence interval...
Based on a random sample of 30 business students, it was found that 95% confidence interval for the average number of minutes required to complete a statistics exam is given by (40.3, 46.5). What is the point estimate for this confidence interval? (select one)
6.2
3.1
43.4
86.8
Homework Answers
Solution: We are given that the 95% confidence interval for the average number of minutes required to complete a statistics exam is:
We are required to find the point estimate for this confidence interval.
We know that:
Therefore, the correct option is 43.4
Add Answer to:
Based on a random sample of 30 business students, it was found
that 95% confidence interval...
A random sample of 60 business students required an average of 50.7 minutes to complete a...
A random sample of 60 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exam is 10.4 minutes. 1.Calculate the margin of error if the confidence level is 98%.
Based on a random sample of 120 rhesus monkeys, a 95% confidence interval for the proportion...
Based on a random sample of 120 rhesus monkeys, a 95% confidence interval for the proportion of rhesus monkeys that live in a captive breeding facility and were assigned to research studies is (0.67, 0.83). Which of the following is true? A. If we used a different confidence level, the point estimate would remain in the center of the confidence interval. B. A larger sample size would yield a wider confidence interval. C. The margin of error for the confidence...
A random sample of students found that 36 out of 190 were right handed. a. Let...
A random sample of students found that 36 out of 190 were right handed. a. Let p represent the proportion of all students that are right handed. Find a point estimate for p. b. Find a 95% confidence interval for the population average p.
Based on a random sample of 20 students from a PE class, they exercise 1.6 hours...
Based on a random sample of 20 students from a PE class, they exercise 1.6 hours (96 minutes) per day on average with sample standard deviation 1.23 hours (78 minutes). Use this information to construct a 95% confidence interval to estimate μ, the population mean number of hours of daily exercise for students. a. State the assumption(s) b. identify whether each assumption is met or not. c. Show your work to calculate the confidence interval and d. interpret the result in...
Based on a random sample of one-bedroom apartments in Boston, the 95% confidence interval for the...
Based on a random sample of one-bedroom apartments in Boston, the 95% confidence interval for the average monthly rent of all one-bedroom apartments in Boston is ($1700, $2000). (a) Give the margin-of-error in the study. (b) Is it possible that the average monthly rent of all one-bedroom apartments in Boston is $1600? (c) If there were more apartments in the sample, would the 95% confidence interval be longer, shorter or remain the same? (d) If the number of apartments in...
A 95% confidence interval for u using the sample results x̄ = 10.7, s=4.5, and n = 30
Use the t-distribution to find a confidence interval for a mean μ given the relevant sample results. Give the best point estimate for μ, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 95% confidence interval for u using the sample results x̄ = 10.7, s=4.5, and n = 30
A business student is interested in estimating the 95% confidence interval for the proportion of students...
A business student is interested in estimating the 95% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within six percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available? Use Table 1. (Round intermediate calculations to 4 decimal places and...
A researcher found a 95% confidence interval for the proportion of college students who believe in...
A researcher found a 95% confidence interval for the proportion of college students who believe in ghosts. The interval was (0.6525, 0.7535). What is the margin of error for this estimate?
A confidence interval for the difference in the mean time for female (Sample 1) and male...
A confidence interval for the difference in the mean time for female (Sample 1) and male (Sample 2) students to complete a statistics test was constructed using independent random samples: −0.5 minutes < µ1 − µ2 < 1.3 minutes What does the confidence interval suggest about the difference in length between male and female test completion times? A. Male students take longer to complete a statistics test. B. Female students take longer to complete a statistics test. C. Male and...
a. Based on this sample, develop and interpret a 95% confidence interval estimate for the proportion...
a. Based on this sample, develop and
interpret a 95% confidence interval estimate for the proportion of
the traveling population that would have been impacted had the
one-bag limit been in effect. Determine the confidence
interval.
b. A certain plane has a capacity for 447 passengers. Determine
an interval estimate of the number of passengers that you would
expect to carry more than one piece of luggage on the plane. Assume
the plane is at its passenger capacity.
c. Suppose...
a. Based on this sample, develop and
interpret a 95% confidence interval estimate for the proportion of
the traveling population that would have been impacted had the
one-bag limit been in effect. Determine the confidence
interval.
b. A certain plane has a capacity for 447 passengers. Determine
an interval estimate of the number of passengers that you would
expect to carry more than one piece of luggage on the plane. Assume
the plane is at its passenger capacity.
c. Suppose...
Most questions answered within 3 hours.
-
1-Write an algorithm to get two numbers from the user (as
inputs) and calculate the sum...
asked 2 hours ago -
Define white-collar crime. What is the difference between
offender and offense-based definitions of white-collar crime? What...
asked 3 hours ago -
Consider a reaction which is 1st order with respect to A and 1st
order with respect...
asked 3 hours ago -
c++
The length of the hypotenuse of a right-angled triangle is the
square root of the...
asked 3 hours ago -
When a metal rod is heated, not only its resistance but also its
length and cross‐sectional...
asked 3 hours ago -
write a c++ program that computes the L^1 - Norm of a given
vector (L^1 norm...
asked 3 hours ago -
A manufacturer of banana chips would like to know whether its
bag filling machine works correctly...
asked 4 hours ago -
Complete the chapter case, "Turnover Analysis".
Chapter Case
Turnover Analysis
You recently completed your company’s new...
asked 4 hours ago -
What is the pH of solutions having the following H3O+
concentrations? Identify each as acidic, basic,...
asked 4 hours ago -
How does over-voltage of the diode usually occur?
asked 4 hours ago -
If you step on a dirty nail, your doctor will recommend you
update your Tetanus vaccination....
asked 4 hours ago -
Suppose that decreases in the price of milk lead to decrease s
in the retail prices...
asked 4 hours ago