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

  Proportions of patients reporting pain relief

Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance.

  Standard error of the average or median

A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?

  Sample of stipends of teaching assistants in economics

A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:

  Error of time series forecasting

The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:

  Graphical method to solveout the linear programming problem

Graphical method to solveout the linear programming problem. Describe where the following TEO constraints intersect.

  Finding plausible value for correlation

Find out a plausible value r for correlation between vehicle weight and miles per gallon (mpg) shown in the scattergram below?

  Finding test statistics and its two-sided p-value

Find out the test statistic s and its two-sided P -value. Do data give good evidence that population mean is not zero?

  Randomly selected day-jail population

The average daily jail population in the United States is 706,242. If the distribution is normal and the standard deviation is 52,145, find the probability that on a randomly selected day the jail population is:

  Coefficient of determination-interpretation

Compute the coefficient of determination, r 2 , and interpret its meaning.

  Explaining hypotheses and decision rule

At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.

  Probability for the mean annual precipitation

What is the probability that the mean annual precipitation during 49 randomly picked years will be less than 101.8 inches?

  Calculation of reorder point

The president of the wholesale distributor is concerned about the possibility of stockouts causing a loss of customer confidence and loyalty and is interested in maintaining safety stock in inventory to prevent potential stockouts.

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