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1. The estimated proportion of Hispanics that are Mexican Americans is 63% Based on a recent study of sample 850 Hispanic grocery shoppers from around the United States and 575 are Mexican American. Does this result provide enough evidence to conclude that the estimated proportion of Hispanic grocery shoppers now are Mexican Americans?
2. What proportion of Hispanics listen primarily to advertisements in Spanish? Suppose one source says that in the past the proportion has been about .83. We want to test to determine whether this figure is true. A random sample of 438 Hispanics is selected, and the Minitab results of testing this hypothesis are shown here. Discuss and explain this output and the implications of this study using a=.05 Test of p = .83 vs p not = .83 Sample=1 x=347 n=438 sample p=.792237 95%CI= (.751184, .829290) Exact P-Value=.042
3.What is the average age of a purchaser of Doritos Salsa Verde? Suppose initial tests indicate that the mean age is 31. Is this figure really correct? To test whether it is, a researcher randomly contacts 24 purchasers of Doritos Salsa Verde with results shown in the following Excel output. Discuss the output in terms of a hypothesis test to determine whether the mean age is actually 31. Let alpha=.01. Assume that ages of purchasers are normally distributed in the population.
Mean=28.81
Variance= 50.2651
Observations= 24
df= 23
t Stat= -1.52
P(T<=a one tail= .0716
t Critical one tail= 2.50
P(T(doesnt = ) two tail = .1431
t Critical two tail= 2.81
Average of this group is 229. Population standard deviation for both groups is 6. At α = 0.01, is there difference in cholesterol levels between two groups?
question test the claim that 14 of a candy makers candies are red. use a 0.05 significance and the table to answer the
Given the above function, use the four-step process to find a slope predictor function m(x). Then write an equation for the line tangent to the curve at the point x = 8.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
If the manufacturer's claim is true, what is the probability that the claim will be rejected?
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary ..
Find the average weight in pounds of a type of bird of your choice. Use the rational exponent equation L = 2.43 * W^0.3326 to estimate the wingspan L in feet of the bird that weighs W pounds (Rockswold, 2006).
If you have a normal distribution of a random variable x, with a mean of 56 and standard deviation of 8: What is the probability that the random variable x will be within plus or minus 1 standard deviation of the mean?
in a trial of 250 patients who received 10-mg doses of a drug daily 30 reported headaches as a side effect.a obtain a
The Big Triple at the local racetrack consists of picking the correct order of finish of the first three horses in the ninth race. If there are 12 horses entered in today's ninth race, how many Big Triple outcomes are possible?
Enter variables using the stepwise procedure.
Discuss whether the percent distribution of the cross-tab and chi-square supports/does not support the researcher's hypothesis.
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