Tests of means and proportions

Assignment Help Basic Statistics
Reference no: EM13111926

A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day, would this prove that they are exceeding their goal.

Reference no: EM13111926

Questions Cloud

Calculate the population mean margin of error : Calculate the population mean margin of error for a 90% confidence interval when sigma is 4 and sample size is 36. Standard IQ test has mean of 98 and standard deviation of 16.
What are the predicted striping pattern phenotypes : In a certain species of fish, the genotype TT has three vertical stripes, the genotype tt has one vertical stripe, and the genotype Tt has two vertical stripes. What are the predicted striping pattern phenotypes and their frequencies in the follow..
Hypothesis testing for graduates : Assume that the population of hours worked per week by college graduates employed full-time is normally distributed with mean . Can we conclude that is greater than 40 hours? Use the .01 level of significance.
Compute the pe value in an acid mine water : What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
Tests of means and proportions : A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day
Compute standard deviation of sample means : Let us suppose you have taken 100 samples of size 49 each from normally distributed population. Compute standard deviation of sample means if population's variance is 16. Area to left of ‘z' is 0.9976.
Calculating the hydrogen ion concentration and ph : A 155 mL sample of rainwater is titrated using 0.0095 M NaOH solution. If 4.8 mL of the NaOH solution was required to reach the endpoint, what was the pH of the rainwater?
Airline industry and overweight baggage : Airlines must be careful about the total weight of baggage carried by a plane on a commercial flight. Passengers with items exceeding the maximum single-item weight (usually about 70 pounds) must pay a fee
Why might permanent errors be more likely then : Cells proofread and repair errors in the genetic information encoded in DNA. But lasting mistakes, or mutations, can happen. The most error-prone stage in DNA replication occurs after parent DNA strands have separated but before new complementar..

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Find out the p-value for the test

The average hourly wage last year for members of the hospital clerical staff in a large city was $6.32. The standard deviation of the population was $.54. This year a sample of 50 workers had an average hourly wage of $6.51. Test the claim at alph..

  Assumption of chi square distribution

In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:

  Critical approach for defective units

Some people who bought X-game gaming systems complained about having received defective systems. The industry standard for such systems has been 98% non-defective systems.

  Z test for population proportion

Can you can tell the difference between coke and pepsi in a blind taste test? Most people say they can and have a preference for one brand or another.

  Determining assignment of probabilities to six faces of die

If die is loaded so that 6 comes up with probability 0.2 and probabilities of 2,3,4, and 5 faces are not affected, determine the assignment of probabilities to the six faces?

  Colorado brook trout

The length of a Colorado brook trout is normally distributed. What is the probability that a brook trout's length, (Round your answers to 4 decimal places.)

  Determining solution using gauss-jordan method

Use Gauss-Jordan method to determine solution to following system of equations?

  Determine coefficient of correlation

Determine the coefficient of correlation between the two variables. Interpret the value.

  Estimating pearson correlation coefficient test

Compute the Pearson correlation. Multiply each X value by 2 and compute the Pearson correlation for the modified scores.

  Sample proportion from the preliminary sample

How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.

  Characteristic of normal probability distribution

A uniform probability distribution is a continuous probability distribution where the probability that the random variable assumes a value in any interval of equal length is.

  Confidence interval to estimate sample size

General Motors pays for employee education. The HR director would like to conduct a study on the average GPA of employees who have used this benefit to complete their degrees using a sample of education records over the past 10 years.

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