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This wine stinks. Sulfur compounds cause "off-odors" in wine. So winemakers want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for DMS in trained wine testers is about 25 micrograms per liter of wine (µg/l). The untrained noses of consumers may be less sensitive, however. Here are the DMS odor thresholds for 10 untrained students:
31 31 43 36 23 34 32 30 20 24
Assume that the odor threshold for untrained noses is normally distributed with σ = 7 µg/l. Is there evidence that the mean threshold for untrained tasters is greater that 25µg/l?
1. The appropriate test to use is
a. T Test
b. 1-Prop Z test
c. Z Test
d. Paired T test
2. The appropriate type of test to use based on the tails of the distribution
a. Left-tailed
b. Two-tailed
c. Right-tailed
3. The p-value of the test is closest to
a. 0.0289
b. 0.0431
c. 0.0134
d. 0.0074
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
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?
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
What is the appropriate conclusion based on the outcome of the hypothesis test?
Determine a 95% confidence interval for the population mean.
In which of the following situations is bootstrapping (and other resampling methods) often used and Which of the following is a valid description of the bootstrapping method.
Compute average daily rainfall in the week and for weekends. Get the average of weekdays' rainfalls and average of weekend's rainfalls.
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
Morality Study for a group of four men, the probability distribution for the number x who live through the next year is as given in the accompanying table.
Compute the probability of exactly 0,1,2,3,4, and 5 arrivals per day.
What is the probability you pick a plum and Which of the following is a legitimate probability distribution for this situation
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