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Cheat Sheet 4

A researcher conducted a study with 42 subjects previously diagnosed with hyperactivity who were randomly assigned to receive either a placebo, 10mg of Ritalin, or 20mg of Ritalin. The subjects were also randomly assigned to receive behavior modification treatment or no treatment. After 8 weeks, the subjects were assessed on a measure of hyperactivity, with higher scores indicating greater hyperactivity. The results showed that subjects who received both Ritalin and behavior modification treatment had lower hyperactivity scores than those who received only Ritalin or only behavior modification.

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31 views1 page

Cheat Sheet 4

A researcher conducted a study with 42 subjects previously diagnosed with hyperactivity who were randomly assigned to receive either a placebo, 10mg of Ritalin, or 20mg of Ritalin. The subjects were also randomly assigned to receive behavior modification treatment or no treatment. After 8 weeks, the subjects were assessed on a measure of hyperactivity, with higher scores indicating greater hyperactivity. The results showed that subjects who received both Ritalin and behavior modification treatment had lower hyperactivity scores than those who received only Ritalin or only behavior modification.

Uploaded by

gaming account
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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1.

A crackpot doctor believes that the use of GPS is related to the number of colds people get; specifically, she hypothesizes that
more hours per week using GPS is related to more colds per year . She conducts a study where she measures GPS use in hours
per week (GPS) and number of colds per year (COLDS) in a sample of 10 randomly selected patients. Note: Both variables are
ratio level measurements. The columns z-GPS and z-COLDS indicate the z-scores for GPS and COLDS, respectively. At alpha
0.05.

2. A hockey coach believes that a special training program will improve his team’s ability to score goals against its opponents. In
the previous season before the training, the team scored an average of 2.96 goals per game with a standard deviation of 1.03 in a
10 game season. In the current season (after the training) , against the same 10 opponents, his team scored 3.12 goals per game
with a standard deviation of 0.94. The goals against each opponent were correlated .72 (significant) between both seasons. At
alpha 0.05

3. A researcher is interested in whether differing dosages of Ritalin combined with behavior modification work better
than Ritalin alone or behavior modification alone. Subjects previously diagnosed with hyperactivity (N = 42) were
randomly assigned to receive either a placebo, a 10mg dose of Ritalin or a 20mg dose of Ritalin. Those subjects
were also randomly assigned to receive behavior modification treatment several times per week or to receive no
such treatment. After 8 weeks, the subjects were all assessed on an interval-ratio level measure of hyperactivity,
with higher scores representing greater hyperactivity. At alpha 0.05.

placebo 10 mg 20 mg

no behavior mood 17.2 17 16.6

behavior mood 16 9 8.4

SS within = 484
SS behmod = 349
SS ritalin = 138
SS behmod x ritalin = 112

4. A restaurant chain wants to see if serving appetizers that are higher in sodium increases the number of drinks customers order.
Randomly assigned customers are given low-sodium (n = 10), moderate sodium (n = 10) or high-sodium (n = 10) free appetizers.
The mean number of drinks ordered was 2 for the low sodium, 2.4 for the moderate sodium, and 3.9 for the high sodium groups.
At alpha 0.05.

SS within = 26.87 SS between = 51.37

5. A sample (n = 80) of teenage women was found to have a correlation of .32 between the frequency of drug use and the trait of
shyness. A sample of teenage men (n = 73) was found to have a correlation of .59 between shyness and drug use. Is there a
difference between male teens and female teens in the strength of the relationship between shyness and drug use? At alpha 0.05.

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