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Dr. Alexander is interested in studying the effects of exercise on mood. Participants included 120 children, half assigned to swim 30 minutes per day and the other half assigned to read 30 minutes per day. After 3 weeks, they administered a test of positive mood. If this study involved a repeated measures design (within subjects) comparing conditions with the same number of participants, how many participants would be in each group?
Find the lowest possible score a candidate can score and still qualify. Assume the scores are normally distributed.
Is there a relationship between the opinion and the location of the resident at a level of significance of 0.05?
James Burke claims that about 70% of all single men would welcome a women taking the initiative in asking for a date. A random sample of 20 single men were asked if they would welcome a women taking the initiative in asking for a date.
Compute the probability that student eats at fast food restaurant 2 or more times per week?
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value, and the conclusion about the null hypothesis. Use the P-value method.
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. An analysis decides to remove records that have missing values. About how many records would you expect would be remov..
Reis, Inc., a New York real estate research firm, tracks the cost of apartment rentals in the United States. In mid-2002, the nationwide mean apartment rental rate was $895 per month
A portfolio p of consisting 60% of stock X and 40% of stock Y, has a correlation ρpM = 0.62 with the market. What is the portfolio volatility? Statement on the diversification effect.
Suppose that 1 out of 500 infant's are born with Down's Syndrome.
Set up the following null and alternative hypotheses for both factors and their interaction. You should have three verbal statements, not symbolized statements.
ABC insurance sells term life insurance policies. If the plicy holder dies during the term of the policy ABC pays out $100000. If the person does not die ABC pays nothing and there is no further value to the policy.
A table showing the season in which the first 36 U.S. presidents died. Research question: At alpha=0.10, Can you reject the hypothesis that presidents' deaths are uniformly distributed by season?
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