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At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening students is significantly different from 21. The average age of the students in the sample was 23 with a standard deviation of 3.5.
a) Formulate the hypotheses for this problem.
b) Compute the test statistic.
c) Using the p-value approach, what is your conclusion? Let α = .05.
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
Compute an F-statistic for each linear construct and determine its significance. Also, state what questions each of these contrasts address.
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major.
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
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