For the following problems

• conduct steps of hypothesis testing
• Populations and hypotheses
• Write out the steps you would do to calculate t
• Choose the t-cutoff score
• Calculate the t-statistic using the computer program SPSS

• Decide whether or not you would reject the null hypothesis
• Interpret this result
• Be sure to include a copy of the SPSS output in the word document

1)Single Sample T-test

A researcher would like to study the effect of alcohol on reaction time.It is known that under regular circumstances the distribution of reaction times is normal with = 200.A sample of 10 subjects is obtained.Reaction time is measured for each individual after consumption of alcohol.Their reaction times were: 219, 221, 222, 222, 227, 228, 223, 230, 228, and 232. Use = 0.05.

1. 2) Dependent T-test A researcher is interested in infants' attention to their mothers' voices. The research wants to know if the infant's attention increases to the mother's voice after spending the first week of life with the mother. The researcher selects 10 full-term infants with normal health who experienced uncomplicated deliveries and tested the number of seconds that the infant oriented in the direction of the mother's voice on Day 1 and on Day 7 after delivery. These fictional data appear below. Use an = 0.01 Day 1 Day 7:... 6 7 5 7 3 6 8 8 7 9 6 8 5 5 6 8 8 7 5 8

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