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How do you set up SPSS to find descriptives for the perceived learning variable for each gender?
How many books should be tested to estimate with 95% to within 0.1 lb, the average force required to break the binding? Assume that sd is known to be 0.8 lb.
Suppose a certain brand of Westinghouse light bulbs has a population life expectancy of 3000 and a population standard deviation equal to 100. (Assume the distribution of the population is normal). What is the probability that a sample of 30 light..
Do a two-sample test for equality of means assuming equal variances. Calculate the p-value. Comparison of GPA for randomly chosen college juniors and seniors: ¯ x1 = 3.05, s1 = .20, n1 = 15, ¯ x2 = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed t..
A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
If a statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 48.0 and 53.0 minutes what is the probability that a given class period runs greater than 51.25 minutes.
Construct a frequency distribution that has 5 classes, and draw:
Statistics Test Scores - Tests in the author's statistics class have scores with a standard deviation equal to 14.1. One of his last classes had 27 test scores with a standard deviation of 9.3.
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Determine the relationship between pretest scores and final exam scores after controlling for cumulative GPA. Compute SPSS test would you run?
Spinning a coin, unlike tossing it, may not give heads and tails equal probabilities. I spun a penny 200 times and got 83 heads. How significant is this evidence against equal probabilities?
Find the value of k that makes f(x; y) a valid probability distribution.
How many people must be surveyed if we want to estimate the percentage who weigh more than 180 pounds? Assume that we want 96% confidence.
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