14) A campus researcher wanted to investigate the factors that affect visitor tr
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14) A campus researcher wanted to investigate the factors that affect visitor travel time in a complex,14) multilevel building on campus. Specifically, he wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. How should th d analyzed? Starting Roonm Wall Signs Map 141, 119,238 85, 94, 126 224, 339, 139 226, 129, 130 A) Completely randomized design C) Levene's test ?) 2 x 2 factorial design D) Randomized block design 15) A completely randomized design 15) A) can have more than one factor, each with several treatment groups B) has one factor and one block C) has only one factor with several treatment groups. D) has one factor and one block and multiple values 16) How many tissues should the Kimberly Clark Corporation package of Kleenex contain? 16) Researchers determined that 60 tissues is the mean number of tissues used during a cold. Suppose a random sample of 100 Kleenex users yielded the following data on the number of tissues used during a cold: X-52, S-22. Suppose the test statistic does fall in the rejection region at a-0.05. Which of the following decision is correct? A)Ata-005, you reject H0. C)Ata-0.10, you do not reject H0- B) At a 0.05, you do not reject Ho DAta-0.10, you reject H0. 17) 17) Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of 8 private colleges in the United States revealed the following endowments (in millions of dollars): 60.2, 470, 235.1, 490.0, 122.6, 1775, 954, and 220.0. Summary statistics yield X = 180975 and S-143042. Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments. A) $180.975: $116.621 C)$180.975 +$94.066 B) $180.975 + $99.123 D) SI 80.975 ± $119.586 18) In a one-way ANOVA, the null hypothesis is always 18) A) some of the population means are different. B) there is no difference in the population means C) all the population means are different. D) there is some treatment effect. 19) When would you use the Tukey-Kramer procedure? 19) A) To test for homogeneity of variance C) To test independence of errors B) To test for differences in pairs of means D) To test for normalityExplanation / Answer
Answer 14).
Here we are making the all tratmentt combination for the treatment , so best way to analyze all treatment combination is factorial design .
Here we are givgn the 2 treatment so factorial design would b3
2X2 factorial design .
So B) is correct
15) using the completely randomized design we can campair the several treatment i.e more than two treatments . But we can analysis one factor.
For example , comparison on 4 treatment at time , here we can only analyse the between treatment effect.
So c ) is correct answer
16) here we are given the value of the alpha=0.05 , and our test statistics is fall in the rejection region , so we are rejecting the null hypothesis at 0.05 level of significance .
Option A) is correct
17) for standard error=mean + 1.64x s/ahet(n)
So using this formula C) is correct
18) the null hypothesis of the ANOVA is all population means are equal ,
So B) option is correct
19) the tukey test is used when ANOVA shows the significant difference between the treatments , and it apply on paired means om the data
So B) is correct option
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