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A student who did volunteer work at an animal shelter wanted to see if cats really respond aggressively to catnip (Jovan, Stats magazine, 1999). Using a sample of 15 cats, she recorded how many "negative interactions" (such as hissing or clawing) each cat engaged in during a 15-minute period prior to being given a teaspoon of catnip and also in the following 15-minute period. Her conjecture was that the number of negative interactions would increase after the introduction of the catnip.
?A test of significance was conducted to see if there was an increase in the average number of negative interactions after catnip was introduced. The researcher determined the t-statistic was 3.24 from this test (where a positive results means more negative interactions).
?Based on the t-statistic do you have strong evidence that catnip will increase the average number of negative interactions?
list the steps at neuromuscular junction leading to opening of voltage gated channels nearby?
The power for a two-sided test of the null hypothesis p = 0.30 versus the alternative p = 0.40 is 0.82. What is the power versus the alternative p = 0.20
using the simple random sample of weights of women from a data set we obtain these sample statistics n40 and x146.82
Find a 95% confidence interval estimate of the population proportion who think that it should be illegal to use a cellular telephone while driving.
Optimal income taxation for purposes of determining vertical equity and accounting for behavioral responses has the following condition
Assume that the number of calories in 12-ounce soda cans is normally distributed. State the null and alternative hypotheses to test the manufacturer claim.
Research question: Are the mean annual attendance rates the same for employees in these three departments?
Find the 95% confidence interval for the population mean quality. Find the 95% prediction interval for the quality of the next measurement.
Construct a normal probability plot for these data. Is there any evidence to suggest non-normality?- Use the backward empirical rule to check for evidence of non-normality.
Consumer Price Index is: a. a weighted aggregate price index where the weight for each item is its current-period quantity. b. a weighted aggregate price index where the weight for each item is its last-period quantity. c. an index that is designed t..
In reporting the frequency distribution of annual household income, the Statistical Abstract of the United States uses these class intervals
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724
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