9.1/4 Identify the test statisticp-value A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2769 occupants not wearing seat belts, 36were killed. Among 7862 occupants wearing seat belts, 14 were killed. Use a 0.05 significance level to test the claim that seat belts areeffective in reducing fatalities. Complete parts (a) through (c) below.

Given : x1= 36.0 n1= 2769 x2= 14.0 n2= 7862 significance level, 0.05

Answered: A simple random sample of front-seat…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a right-tailed test comparing two proportions, the test statistic was zcalc = +1.5. The p-value is:
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The Weschler Intelligence Scale for Children (WISC) is an intelligence test designed for children between the ages of 6 and 16. The test is standardized so that the mean score for all children is 100 and the standard deviation is 15. Suppose that the administrators of a very large and competitive school district wish to estimate the mean WISC score for all students enrolled in their programs for gifted and talented children. They obtained a random sample of 40 students currently enrolled in at least one program for gifted and talented children. The test scores for this sample are as follows: 117,142,112,99,107,109,109,121,121,125,116,123,110,105,110,111,95,128,103,106, 155,98,100,123,107,137,115,127,102,106,121,113,109,128,103,105,130,134,112,102 Click to download the data in your preferred format. CrunchIt! CSV Excel JMP Mac Text Minitab PC Text R SPSS TI Calc Use this data to calculate the mean WISC score, x¯, for these 40 students. Next, compute the…
Identify the appropriate test statistic to be used if it is t-test, central limit theorem, chi-square test or z test
In the last quarter of 2007, a group of 64 mutual funds had a mean return of a standard deviation of 0.6% Consider the Normal model N(0.052, 0.006) for the returns of these mutual funds a) What value represents the 40th percentile of these returns? b) What value represents the 99th percentile? What's the IQR, or interquartile range, of the quarterly returns for this group of funds? SOCCE a) The value that represents the 40th percentile is%. (Round to two decimal places as needed.) b) The value that represents the 99th percentile is%. (Round to two decimal places as needed.) c) The IQR is% (Round to two decimal places as needed.)

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