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Blood Test Results

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Subject A is 19 year old student, 1.72 m tall and weighs 53kg.

Subject A has been suffering from severe diarrhoea, stomach cramps, flatulence, bloating and stomach pain. He has been suffering from tiredness and generally feeling run down.

Subject A is non drinker, non smoker, often skips breakfast but always has cooked meal with meat later in the day and tries to eat 5 portions of fruit and vegetables per day. Subject A likes to eat yoghurt and ice cream but rarely eats cakes or biscuits.

Subject A's Body Mass Index calculated at 18 which classifies him as underweight.

Subject A told to keep food diary for one week and blood tests taken.

After one week the Subject A reported that he had noticed that stomach pain and bloating occurred after he had eaten the following foods:-

Cauliflower cheese
Strawberry milkshake
Custard tart
Hot chocolate

Blood Test Results

Analyte Subject A's Value Normal Values
Haemoglobin 147 g l-1 120-160 g l-1
Serum Iron 21.3 mmol l-1 14-29 mmol l-1
Iron Binding capacity 66 mmol l-1 45-72 mmol l-1
Serum folate 8.0 mg l-1 2-13 mg l-1
IgA anti-endomysium antibody Negative negative

Questions:

1. Would I be correct is thinking that Subject A's symptoms indicate lactose intolerance and the tests were carried out to confirm this?

2. What condition would the presence of the IgA anti-endomysium antibody indicate?

3. Would can be seen from Subject A's test results?

See attached file for full problem description.

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Subject A is 19 year old student, 1.72 m tall and weighs 53kg.

Subject A has been suffering from severe diarrhoea, stomach cramps, flatulence, bloating and stomach pain. He has been suffering from tiredness and generally feeling run down.

Subject A is non drinker, non smoker, often skips breakfast but always has cooked meal with meat later in the day and tries to eat 5 portions of fruit and vegetables per day. Subject A likes to eat yoghurt and ice cream but rarely eats cakes or biscuits.

Subject A's Body Mass Index calculated at 18 which classifies him as underweight.

Subject A told to keep food diary for one week and blood tests taken.

After one week the Subject A reported that he had noticed that stomach pain and bloating occurred after he had eaten the following foods:-

Cauliflower cheese
Strawberry milkshake
Custard tart
Hot chocolate

Blood Test Results

Analyte Subject A's ...

Solution Summary

Blood test results are examined. Different subjects are tested for diseases.

$2.19
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Hypothesis Testing: The Effect of Television Violence on Blood Chemicals

A researcher studied the effect of television violence on concentration of a particular blood chemical. In this study, 40 participants were measured over a period of an hour prior to watching a violent show and then immediately after. In the results section, the researcher writes: "There was a significant decline in blood concentration from a mean of 13.41 (SD=2.48) to 12.38 (SD=2.69), t(39)=3.38, p<.01 (one tailed)."

Can you explain this result (including the underlying logic of the computations) to me who understands hypothesis testing involving a single sample and a known population, but knows nothing about t tests?

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