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Data from Mexico. Refer to the previous exercise. A similar study in Mexico was conducted with 31 women and 20 men. The women averaged 14,704 words per day with a standard deviation of 6215. For men the mean was 15,022 and the standard deviation was 7864.
(a) Answer the questions from the previous exercise for the Mexican study.
(b) The means for both men and women are higher for the Mexican study than for the U.S. study. What conclusions can you draw from this observation.
Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use alpha = .05
in order to be effective reflective highway signs must be picked up by the automobiles headlights. to do so at long
Would this indicate that the actual proportion of stopped drivers given tickets is not equal to .88? Use a 1% significance level.
The coin is tossed twice and a value for Y , the number of heads, is observed. For each possible value of Y , which of the two values for p (1/4 or 3/4) maximizes the probability that Y = y? Depending on the value of y actually observed, what is t..
Test to determine whether the amount of time spent in the park decreases with increases in the age of the park user. Use a significance level of 0.10.
steel rods are manufactored with a mean length of 26 centimetercm. because of variability in the manufactoring process
what are the degrees of freedom for hartleys test statistic for a one - factor anova with n1 5 n2 8 n3 7 n4 8 n5
if r -0.665 and n 6 test the significance of the correlation coefficient at a .05 reject p 0 because 2.68gt 2.57do not
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
Kim starts to walk 3 mi to school at 7:30 a.m. with a temperature of 0 degrees F. Her brother Bryan starts at 7:45 a.m. on his bicycle, traveling 10 mph faster than Kim.
Find the middle 80% range (i.e. range that is symmetrical about the mean) for the age of its subscribers.rs. What proportion of Mogul's newsstand customers have ages in the range computed above?
Bimodal distribution with a very large standard deviation for the population. For most teachers such a distribution makes the matter of how to teach very tricky.
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