Ninety-percent confidence interval

Assignment Help Basic Statistics
Reference no: EM13104350

Suppose we wish to estimate the true population of HSB students who own cars. We randomly sample 100 HSB students and find 20 students own a car. Find a 90% confidence interval for p.

Reference no: EM13104350

Questions Cloud

Confidence intervals-population means : Construct a 95% confidence interval to estimate the population mean with a sample mean = 110 and ? = 30 for the following sample sizes:
Population monthly expenditure mean : Suppose a t- test is being applied to find out if the population monthly expenditure mean is less than $212. The level of significance selected is 1% and 26 accounts are sampled. What is the critical value?
Determining confidence intervals : In a recent study of 86 working adults, the mean number of hours per week spent talking on the phone was 21.6. The sd= 5.7 hours.
What percentage of the rock is gold by mass : A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.40 10-4 m3 and its mass is 3.87 kg. a) What mass of gold is in the rock? b) What percentage of the rock is gold by volume? c) What percentag..
Ninety-percent confidence interval : Suppose we wish to estimate the true population of HSB students who own cars. We randomly sample 100 HSB students and find 20 students own a car.
Which p-value will reject the null hypothesis : Scientist does n ot believe that water ph is 7. She wants to test the null hypothesis that the true level of ph is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a ph of 7. Which p-value will she reject..
Quality management concepts support sustainability efforts : How do you think that quality management concepts can support sustainability efforts? Find some sources or examples to support your beliefs.
Confidence maximum error of estimate-confidence interval : A machine produces parts with lengths that are normally distributed with ? = 0.59. A sample of 19 parts has a mean length of 76.26.
Explain communication skills required for psychology : Write down essay why are you interested in mental health psychology. Explain the communication skills and technologies required for psychology.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Difference in the mean number of drinks

How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..

  Critical-value and p-value method of hypothesis testing

What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.

  Stem-and-leaf diagram

The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Construct a stem-and-leaf diagram for the data:

  Describe the sample as it relates to the population

Identify the variable being measured and describe the sample as it relates to the population.

  Sample size with confidence level-standard deviation

We want to estimate the population mean within 5, with a 99 percent level of confidence. The population standard deviation is estimated to be 15. How large a sample is required?

  Findout probabilities utilizing standard normal distribution

Findout probabilities utilizing standard normal distribution. If the debt is normally distributed with a standard deviation.

  Statistical process control

ABC Corporation has been using statistical process control for several months.

  Queuing theory question

People arrive at a restaurant at a rate of five per minute and wait to receive their order for an average of 5 mins. Customers eat in with a probability of 0.5 and carry out with a probability of 0.5.

  Random sample of hundered registered voters

Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..

  Interval and sample means

The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inch. Suppose a random sample of 20 balls is selected. Find the inte..

  Proportion of observed variation in hardness

What proportion of observed variation in hardness can be explained by the simple linear regression model relationship between hardness and elapsed time? (Give the answer to three decimal places.)

  Shape of sample-value of estimate

What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd