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An engineer examines the relationship between the w eight of a car and its average miles per gallon (MPG). For a sample of 100 cars, he calculates a Spearman rank correlation coefficient of - 0.60.
a. Specify the competing hypotheses in order to determine whether a negative relationship exists between a car's weight and its average MPG.
b. Assume that the distribution of rs is approximately normal. Calculate the value of the test statistic and the p-value.
c. At the 5% significance level, are the variables negatively related? Explain.
Compute simple main effect tests for the type of adult factor at each level of the consequences factor. Use Tukey's HSD to analyze the significant.
At the 0.10 significance level was the sample result different from the usual pattern? Show how to plug this in megastat and if it is chi square or anova.
What percent of the 100 shots did she hit?- Examine the sequence of hits and misses. How long was the longest run of shots made? Of shots missed?
Stanford Binet IQ scores have a mean of 100 and a standard deviation of 15. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score.
A company is conducting a survey of 235 people to measure the level of interest in a new product. Assume that the probability of a randomly selected person's being "very interested" is 0.88
If you test the null hypothesis at the 0.05 level of significance, what decision do you make using the critical value approach to hypothesis testing?
the following data are the temperatures of effluent at discharge from asewage treatment facility on consecutive days43
After the game has progressed a while, can you predict whether or not the next card will be a face card with a rule that is accurate more than 23% of the time? Explain.
The purpose of this example is not to negate the serious and unexpected outcomes related to heart disease, which hormones were thought to protect against.
The mean number of cargo ships that arrive at a port is 3 per day. The port has staff and facilities to handle up to 6 ships in a day. Using the Poisson distribution, find the probability that, on a given day,
A coin which lands heads with probability p is tossed repeatedly. Assuming independence of the tosses, find formula for
a random sample of 20 people found that the number of mail-order catalogs that each had received in the last month were
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