A student wanted to construct a 95 confidence interval for, Ask an Expert

Statistics

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 12 students. Their average age was 20.7 years with a standard deviation of 1.2 years. What is the best point estimate for the population mean?

a. 2.2 years

b. 20.7 years

c. 1.2 years

d. 12 years

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91012436

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Given a trendline of y 5832x 135799 where the variable x

Given a trendline of y = 5832x + 135799, where the variable x represents the age of a home (in years) and the variable y represents its current market value (in dollars), use this trendline to predict the current market ...

A random sample of 40 hotel reviews is drawn from a large

A random sample of 40 hotel reviews is drawn from a large population of hotel customers. It's known that 30% of the population left the hotel 1 star, 20% left 2 stars, 20% left 3 stars, and 30% left 4 stars. Give the hot ...

Suppose that 20 of men p20 and 15 of women p 15 are

Suppose that 20% of men (P=.20) and 15% of women (P= .15) are carriers of a particular genetic trait. That trait can only be inherited by a child if both parents are carriers. What is the probability that a child is born ...

A highway rest area contains a vending machine that

A highway rest area contains a vending machine that dispenses cups of coffee. The amount of coffee that the machine provides when a purchase is made approximately follows a uniform distribution between 200 and 250 ml. (a ...

There are 2 white balls and 8 red balls in an urn consider

There are 2 white balls and 8 red balls in an urn. Consider selecting one ball at a time from the urn. What is the probability that the first ball is red and the second ball is also red? Express the probability in fracti ...

Suppose a random sample of n 49 observations is selected

Suppose a random sample of n = 49 observations is selected from a population that has normal distribution with mean 106 and standard deviation 12. a) Give the mean and the standard deviation of the sample mean X. b) Find ...

A bottle of water is supposed to have 12 ounces the

A bottle of water is supposed to have 12 ounces. The bottling company has determined that 98% of bottles have the correct amount. Which of the following describes a binomial experiment that would determine the probabilit ...

In a study of helicopter usage and patient survival among

In a study of helicopter usage and patient? survival, among the 55,032 patients transported by? helicopter, 227 of them left the treatment center against medical? advice, and the other 54,805 did not leave against medica ...

Assume the random variable x is normally distributed with a

Assume the random variable x is normally distributed with a mean u=80 and a standard deviation o=4. Find the indicated probability. P(69 P(69 Round to four decimals places as needed.

A professor teaches two statistics classes the morning

A professor teaches two statistics classes. The morning class has 25 students and their average on the first test was 82. The evening class has 15 students and their average on the same test was 74. What is the average o ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert