Researcher measures the mean time

Assignment Help Basic Statistics
Reference no: EM132227803

A researcher measures the mean time (in seconds) it takes two groups of children to complete a activity task. She finds that Group A (M = 22 seconds) completed the task more quickly than Group B (M = 36 seconds). She then computes a weighted mean for both groups combined and calculates = 31. Based on the information provided, which group had a larger sample size? Please show me how to solve this problem

Reference no: EM132227803

Questions Cloud

Find the indicated probability : a) Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.)
Why is hypothesis testing important : Why is Hypothesis testing important? When is Hypothesis testing most useful?
What is the probability that the hour hand : Dr. Gruner brings his old pocket watch to be repaired. The gears stopped and will not turn. What is the probability that the hour hand is between the 5 and the
What is the probability that all three marbles : If John selects marbles at random, what is the probability that all three marbles are a different colour?
Researcher measures the mean time : A researcher measures the mean time (in seconds) it takes two groups of children to complete a activity task. She finds that Group A (M = 22 seconds)
Attributes of a good quantitative analysis model : BUSN 603 - QUANTITATIVE ANALYSIS - American Public University - Articulate individual student learning goals and/or expectations for the class
What is the probability that the spinner lands : What is the probability that the spinner lands on red and the coin toss is tails? Do not round your answer.
Discuss about development space or imagination space : Choose a company that has development space or imagination space to improve or getting better. All new IDEA come up need to be think from your self INNVATION.
Difference in the proportion of cell phone users : What is the best estimate for the difference in the proportion of cell phone users who use text messages, between adults (de?ned as 18 and over) and teens?

Reviews

Write a Review

Basic Statistics Questions & Answers

  What is the probability that decisions are upheld

Suppose that a judge's decisions are upheld by an appeals court 90% of the time. In her next 10 decisions, what is the probability that 8 or more of her decisions are upheld by an appeals court

  Estimate the population variance of gas mileage

A random sample of 5 cars of type A that were test driven yielded the following gas mileage on the highway: 29.1, 29.6, 30, 30.5, 30.8.

  Mean annual cost to attend a private university

For the most recent year available the mean annual cost to attend a private university in the US was $26,889. Assume the distribution of annual costs follows a normal probability distribution and the standard deviation is $4,500. 95% of all studen..

  Describes the relevant components of the medical record

Regulations related to the release of personal and medical information of a patient. Describes the relevant components of the medical record you expect the family physician will want to see.

  Support the claim of the executives

About 500 are observed, and 30% are observed being returned to Enterprise. Is there statistical evidence to support the claim of the executives? Conduct a complete (5 step) hypothesis test using a .05 significance level (95% confidence).

  Probability that more than five sticks will be defective

Tthe sticks in the shipment fail to meet specifications. What is the probability that no more than 3 will be defective? What is the probably that more than 5 will be defective?

  Construct a 95 confidence interval for the difference

a sample of 85 male professors at a major four-year university produced a mean annual pay of 75600 and a standard

  Evidence say about the law of one price

What does the real world evidence say about the law of one price?

  Write the data provided in probability form

a) Write the data provided in probability form and write the complements.

  Sketch a t -v diagram then draw a circle to indicate the

a sketch a t -v diagram then draw a circle to indicate the region where you are guaranteed to find ideal gas states on

  What is the significance value

HI6007 SPSS Assignment: For each correlation discuss the results: Are they are positive/negatively correlated? Are they weak or strong correlations? What is the significance value? What does the significance value reveal about the data we have used

  The estimated ridge standardized regression coefficients

a. Obtain the estimated ridge standardized regression coefficients, variance inflation factors, and R2 for the following biasing constants: c = .000, .005, .01, .02, .03, .04, .05.

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