d) In the condusion in paniekwhkhtype oferror interinion pspc The expermaten- ar

Question

d) In the condusion in paniekwhkhtype oferror interinion pspc The expermaten- are we possibly making Type I Type II? whether the mean soore Soe the intervention group Describe what that type ol emee mcats in thiswa higher on the HRSIW sublest Hearing and Recording Sounds in Words) than the mean (a)State the all and ahernative botheses of the () The p-value for the test is 002 State the con- the control group (a) It we are conducting a statistical test and deter ming that our sample shows signicant ros there ase two possible rcalitics: We ane right in are wrong In each describe the situation in teems o hypothes ic) The efflect sine was ahout two pointswhich b) l we are conducting a statistical test and deter mine that our sample shows imigniicant rou there a? tuo possible realities we are right in our conclusion or we are wrong In cach cass was appeoximately two points higher than the nok be practically signcant What docs she mean by this in this contex )Explainwhy we genctally wonlever knowwhich 16 Weighe Lass Pregram Suppose that a weight Seies of Tests Esercise 4347 introdaces a study in ?company advertises that people uning it. pro which halted the kndergarandasein a schol da. gram lse an average of 8 pounds the irst moath rict ane randomly assignedtreceine Pads We lea and that the Federal Trade Commision 4the main Mai the results are signifcam at the S% levdek overnmont agency responsibile for truth in adcan for the iPad group is sigsificantly higher than tising) is gathering evidence to see if this advertisinghe contrl group) for the roults on the HRSIW It the FTC fads average is less than 8pounds, the agency will Slestests and the results wene not significant or the lassuit apainst the company for false advertising ther 9css Explain ing the pooblem of mutipke ess why we might want to hesitaic eore we run out to buy iPads for all kinderpartners hused on the rcwults of this study 4149 Eating Breakfast Cr.e?.nd C eíir Beys (a) What are the nalland aherma tive hypothesesthe FTC should ume? (b) Suppose that the FTC gathers information from a very large random sample of patrons and finds that the average weight loss daring the s s7-79 pounds withaarticke wich found that wome pvalae for this esalt o0006 What is the co- cusion ef the te Are the resuks statistically more lcly to conceive boysThe study med c) Do youthink the esalts of the Iest are practically rack od 133 foods and for each food toted whethe ignificant? Inother words, do youthink patronswas a ditlerence in the proportion age is 79 pounds lost rather than 8.0 pounds lost?who d Discuss the dfferenoe between practical signiwed a Of all the foodh asigniticant diflerence cance and statistical significance in this context 4147 DeiPas Help kindergrteers Lear: A Sel test The Auburn, Maine, chool district conductiod an early literacy caper ment ia tlic iallcd 2011. In Sepember, l of the kindergartenclasses were n- domly assignod iPads (the interveation goup)whe the other hall of the classes got them in Doccmber a) If sone of the 133 foods actually have an on the gender of aconceived chill how many id any) of the indvidual tests wowld you espet to age dilleresce score gam between the control asamn Sitn5 MuMHa

Explanation / Answer

4.148) When you are testing n number of tests of hypothesis simultaneously each of 5% level of significance, then, the familywise error rate for all the n tests together becomes much higher than 0.05.

So, to control the family wise error rate at 5%, we need to adopt different procedure such as Bonferroni. Tukey, Duncan, Scheffe etc.

If we don't control that then we might accept null hypothesis when we are not supposed to. So, it might be that if would have controlled family wise error rate at 5%, then we would have found more number of tests those are significant. So, we should not rely on the claim and not rush to buy ipads.

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