8,918 Answered Questions for the topic statistics

Statistics

04/27/24

Suppose that an accounting firm does a study to determine the time needed to complete one persons
Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. The sample mean is 23.6 hours. There is a known standard deviation of 7.0 hours. The... more
Follows • 1
Expert Answers •1
Statistics

04/25/24

Problem I. Daily Minimum Temperature Continued (rstudio)

Problem I. Daily Minimum Temperature Continued We will again use the daily minimum temperatures.csv file. The Daily Minimum Temperatures dataset describes the minimum daily temperatures over 10... more
Follows • 1
Expert Answers •1
Statistics

04/24/24

SAT scores are normally distributed with a mean and standard deviation

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is interested in estimating the average SAT score of first-year students. If... more
Follows • 1
Expert Answers •1
Statistics

04/24/24

A researcher might estimate the average height with the following sample heights

A researcher must estimate the average height (in inches) with the following sample heights: 66.1 59 66.9 72.1 72.8 68.6 62.7 Assuming the population of heights are normally distributed, find the... more
Follows • 1
Expert Answers •1
Statistics

04/24/24

Estimate the population mean

Estimate the population mean by finding a 95% confidence interval given a sample of size 15, with a mean of 47.8 and a standard deviation of 11.2.CorrecConfidence Interval: What is the 95%... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

Assuming the population has a bell-shaped distribution
Assuming the population has a bell-shaped distribution, if a sample size n=9 has a sample mean x¯=45 with a sample standard deviation s=10, find the margin of error (MOE) at a 90% confidence... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are:
The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are: 99.3 97.6 98 96.9 97.2 99.5 96.4 96.5 97.8 98.5 98.3 99.1 Assume high temperatures are normally... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

The effectiveness of a blood-pressure drug is being investigated.

The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 31.2 for a sample of size 491 and standard... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

Use the following sample to estimate a population mean .
Use the following sample to estimate a population mean �. 30.8 59.7 41.5 62.6 29.5 57 35.4 37.7 48.1 45 58 28 57.5 54.7 57.3 Find the 90% confidence interval about the population... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

Use the following sample to estimate a population mean .
Use the following sample to estimate a population mean �. 51.8 64.9 59.8 55.6 57.9 71 58.7 Assuming the population has a bell-shaped distribution, find the 95% confidence interval about the... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

Estimate the population mean by finding a 99% confidence interval given a sample of size 17, with a mean of 51.6 and a standard deviation of 6.7.
Estimate the population mean by finding a 99% confidence interval given a sample of size 17, with a mean of 51.6 and a standard deviation of 6.7.What is the 99% confidence interval to estimate the... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

Estimate the population mean by finding a 95% confidence interval given a sample of size 15, with a mean of 47.8 and a standard deviation of 11.2.

Estimate the population mean by finding a 95% confidence interval given a sample of size 15, with a mean of 47.8 and a standard deviation of 11.2. Confidence Interval: What is the 95% confidence... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are:
The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are: 99.3 97.6 98 96.9 97.2 99.5 96.4 96.5 97.8 98.5 98.3 99.1 Assume high temperatures are normally... more
Follows • 1
Expert Answers •1
Statistics

04/22/24

For a confidence level of 99% with a sample size of 22, find the critical t value for a confidence interval for one mean. Round to the nearest thousandth.
Follows • 1
Expert Answers •2
Statistics

04/22/24

How many students
SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is interested in estimating the average SAT score of first-year students. If... more
Follows • 0
Expert Answers •1
Statistics Math

04/19/24

Find the value (in dollars) of the account after 2 years
A deposit of $40,000 is placed in a scholarship fund that earns an annual interest rate of 2.75% compounded daily. Find the value (in dollars) of the account after 2 years.(Assume all years have... more
Follows • 1
Expert Answers •1
Statistics Math

04/19/24

10% annual interest, compounded quarterly
Calculate the amount of interest earned in 9 years on $16,000 deposited in an account paying 10% annual interest, compounded quarterly. (Round your answer to the nearest cent.)$
Follows • 1
Expert Answers •1
Statistics Math

04/19/24

 8% interest compounded quarterly to yield $10,000 in 3 years?
How much money should be invested in an account that earns 8% interest compounded quarterly to yield $10,000 in 3 years? (Round your answer to the nearest cent.)$
Follows • 1
Expert Answers •1
Statistics Math

04/19/24

If the analyst leaves the money in the account for 2 years,how much interest (in dollars) is earned on the account?
A business analyst deposited $50,000 into an account earning an annual interest rate of 5.5% compounded monthly. If the analyst leaves the money in the account for 2 years,how much interest (in... more
Follows • 1
Expert Answers •1
Statistics Math

04/19/24

Find the APY (in percent)
A bank offers a CD at an annual interest rate of 7% compounded monthly. Find the APY (in percent). Round to the nearest hundredth of a percent. %
Follows • 1
Expert Answers •1
Statistics

04/19/24

Changing the mean and standard deviation of a Normal distribution by a moderate amount can greatly change the percent of observation in the tails.

Changing the mean and standard deviation of a Normal distribution by a moderate amount can greatly change the percent of observation in the tails. Suppose that a college is looking for applicants... more
Follows • 1
Expert Answers •1
Statistics

04/18/24

What is the test statistic and critical value?
A movie theater company wants to see if there is a difference in the average price of movie tickets in St. Louis and Cleveland. They sample 20 ticket stubs from St. Louis and 25 from... more
Follows • 1
Expert Answers •1
Statistics

04/17/24

Hypothesis testing with paired differences
You wish to test the following claim (HaHa) at a significance level of α=0.1. For the context of this problem, μd=μ2-μ1 where the first data set represents a pre-test and the second data set... more
Follows • 1
Expert Answers •2
Statistics

04/16/24

The population of weights of a particular fruit is normally distributed, with a mean of 766 grams and a standard deviation of 14 grams. If 8 fruits are picked random, then 20% of the time
The population of weights of a particular fruit is normally distributed, with a mean of 766 grams and a standard deviation of 14 grams. If 8 fruits are picked random, then 20% of the time, their... more
Follows • 1
Expert Answers •1
Statistics

04/16/24

helppp plz I was able to get the first but second one is confusing, please and thank you!
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 37 for a sample of size 12 and standard... 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.