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In a test quality of two television commercials, each commercial was shown is a separate rate test are six times over a one-week period. The following week a telephone survey was conducted to identify individuals who had seen the commercials. Those individuals were asked to state the primary message in the commercials. The following results were recorded. Commercial A Commercial B # Who Saw Commercial 150 200 #Who Recalled Commercial 63 60
a. Use a= .05 and test the hypothesis that there is no difference in the recall proportions for the two commercials.
b. Compute a 95% confidence interval for the difference between the recall proportions for the two populations.
A quality control engineer wanted to estimate the mean weight (in grams) of M&M candies being produced on a certain machine in the factory. After collecting an appropriate random sample of M&M candies, he obtained the following weights:
q1. suppose that x xijnx2 is an observed data matrix from a bivariate normal distribution nmusigma2i where i is the 2
JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
The self-service prices for a sample of 15 retail outlets during Labor Day weekend of 2007 in the detroit, michigan area. What is the arithmetic mean selling price?
A population has a mean of mu = 30 and a dtadard deviation of 5. if 5 points were added to every score in the population, what would be the new values for the mean and standard deviation?
please answer the question below focused on the topic of statistics for business.discuss the similarities and
The p-value of the test is closest to:
In a recent year grade 8 Washington State public school students taking a mathematics assessment test had a mean score of 276.1 with a standard deviation of 34.4. Possible test scores could range from 0 to 500. Assume that the scores are normally dis..
Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = 0.05, is number of sticks of gum person chews per day actually greater than 8?
A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes.
Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of def..
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
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