8.14 Proof for a suggestive disagreement in the variances of the moderate colorless dignity cell reckon among patients who did and patients who did not hold a bacterial amelioration.
8.15 What is the expend proof act to proof for suggestive disagreements in average colorless dignity cell reckon among fellow-creatures who do and fellow-creatures who do not hold a bacterial amelioration?
8.18 Compute a 95% CI for the penny disagreement in average colorless dignity cell reckon among the two groups.
A 1980 consider was conducted whose aim was to collate the indoor air disposition in offices where smoking was careless after a while that in offices where smoking was not careless . Measurements were made of carbon monoxide (CO) at 1:20 p.m. in 40 is-sue areas where smoking was careless and in 40 is-sue areas where smoking was not careless. Where smoking was careless, the average CO raze was 11.6 ability per favorite (ppm) and the exemplar flexuosity CO was 7.3 ppm. Where smoking was not careless, the average CO was 6.9 ppm and the exemplar flexuosity CO was 2.7 ppm.
a) State the void hypothesis
Null hypothesis: There is no suggestive disagreement among the average CO raze in institutions where smoking is careless and institutions where smoking is not careless.
b) State the choice hypotheses
There is a suggestive disagreement among the average CO raze in institutions where smoking is careless and institutions where smoking is not careless.
c) show the proof statistics.
Work areas (1)=40
Work areas 2=40
Standard flexuosity of is-sue area 1= 11.6
Standard flexuosity of is-sue area 2= 2.7
Mean of is-sue area 2= 6.9
Mean of is-sue area 1= 7.3
Ho= exemplar dev1=exemplar dev2
Ha= exemplar dev1 does not resembling exemplar dev 2
F proof: exemplar flexuosity of is-sue area 1^2 / exemplar flexuosity of is-sue area 2
DOF= 40-1=39 ( for twain)
Critical treasure = .05
8.25 Proof for whether the exemplar flexuosity of CO is suggestively irrelative in the two types of is-sueing environments.
A camera has been open to expose the intercourse of cataract balance accurately. Using this camera, the clear raze of each aim (or pixel) in the lens of a anthropological eye can be characterized into 256 gradations, where a clear raze of 1 represents ebon and a clear raze of 256 represents colorless. To proof the camera, photographs were enthralled of 6 randomly chosen usual eyes and 6 randomly chosen cataractous eyes (the two groups continue of irrelative fellow-creatures). The median clear raze of each eye was computed balance the 10,000+ pixels in the lens. The facts are dedicated in Table 8.14.
8.28 What statistical act can be used to proof whether there is a suggestive disagreement in the median clear razes among cataractous and usual eyes?
* paired t proof?
8.29 Carry out the proof act mentioned in Problem 8.28, and news a p-value.
8.30 Provide a 99% CI for the average disagreement in median clear razes among cataractous and usual eyes.
8.39 What is the expend proof act to state whether there is a immanent disagreement among the assessments of Doctor A vs. Doctor B?
? chi squared separation?
* expend statistical act
8.56 What proof can be performed to collate the variances of the two genotype groups?
8.92 What proof can be used to collate the average ln (ERG repletion) among patients after a while dominant vs. recessive RP?
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