13 Answered Questions for the topic Confidence

02/11/21

How does the ASVAB work?
Are you looking for a promising military career? Do you feel that there is more to than just serving honorably?My program can help you beyond the ASVAB. We look for improvement, sense of confidence... more
Follows • 0
Expert Answers •1

06/12/20

Intro to statistics

Suppose we want to estimate the average IQ score for the population of statistics students. What is the minimum number of statistics students that must be randomly selected for IQ tests if we want... more
Follows • 1
Expert Answers •1

04/17/17

confident intervals and central limit theorem.
A random sample of 39 cows was fed a special high-protein grain for a month. Each was weighed before and after and the average weight gained was 6.7 pounds, with standard deviation 7.1.i. Construct... more
Follows • 2
Expert Answers •1
Confidence

04/10/17

How to answer this?
The replicate results (mg/L) obtained from calcium determination of a blood sample using atomic absorption spectrophotometry (AAS) and a new colorimetric method were as following: AAS : 11.2, 11.2,... more
Follows • 2
Expert Answers •1

10/18/16

Mean or Proportion?!
1. Chips Ahoy wants to perform a study to determine the number of chocolate chips in their cookies. To that end, they collected a sample of 40 cookies. The mean of this sample is 23.95 chocolate... more
Follows • 1
Expert Answers •1
Confidence Statistics Question

04/25/16

Which of the following descriptions of confidence intervals is correct?
Which of the following descriptions of confidence intervals is correct? (Select all that apply) a. If a 95% confidence interval contains 0, then the 99% confidence interval contains 0 b. If a 99%... more
Follows • 2
Expert Answers •1

04/20/16

Statistics: A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television
A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television each week was 12 hours and the standard deviation was 2.5 hours. The mean time... more
Follows • 2
Expert Answers •1

04/14/16

did i understand this question properly and answer it correctly?
An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected adults, 315 identified themselves as Latinos, 323 identified themselves... more
Follows • 2
Expert Answers •1

04/14/16

did I solve this right?
In a recent sample of 84 used car sales costs, the sample mean was $6,425 with a standard deviation of $3,156. Assume the underlying distribution is approximately normal. i. Construct a 95%... more
Follows • 2
Expert Answers •1

04/13/16

Did I solve this correctly?
You were interested in how long the average psychology major at your college studies per night, so you asked 10 psychology majors to tell you the amount they study. They told you the following... more
Follows • 2
Expert Answers •1

04/11/16

help with part of a question
You take a sample of 22 from a population of test scores, and the mean of your sample is 60.You know the standard deviation of the population is 10. What is the 99% confidence interval on the... more
Follows • 2
Expert Answers •1
Confidence Interval Notation

04/11/16

did I answer this correctly
Why is a 99% confidence interval wider than a 95% confidence interval?A 99% confidence interval is wider than a 95% confidence. If I had a 95% confidence interval, that would mean that I am 95%... more
Follows • 2
Expert Answers •1

03/29/16

Statistics question: A random sample of 40 statistics students had an average test grade of 81.5
A random sample of 40 statistics students had an average test grade of 81.5 and a standard deviation of 10.2. Construct the confidence interval for the population mean, μ if c = 0.90.   The... more
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.