Your research group has been hired to study student satisfaction with the dininghalls at Illinois State University and your group has determined that 95% offemale students are satisfied with their dining services while 55% of malestudents are satisfied with their the dining services. The sample size of femalesis 150 students and the sample size of males is 250 students for this study.Based on this information, your research group calculates the z-score to be:[____).

Given thatfemale p1=0.95, n1=150male p2= 0.55, n2=250z= now,

Answered: Your research group has been hired to…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Studies indicate that excessive noise at night can affect weight gain. One study of n = 127 rats compared the weight gain of rats exposed to excessive noise at night and the weight gain of rats in a quiet night environment. Sample statistics for the study are given in the table below. Use this information to determine if there is significant evidence that weight gain of rats exposed to excessive noise at night is different on average than weight gain of rats in a quiet night environment. Excessive noise at night environment (Group 1) Quiet night environment (Group 2) Sample mean (grams) 22.4 19.9 Sample standard deviation (grams) 6.4 3.8 Observations/Sample size 69 58 Which of the following formulas would you use to calculate the test statistic? and calculate the test statistic to two decimal places (2dp). Test statistic =
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