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A recent marketing and promotion campaign by Charles of the Ritz more than doubled the sales of the suntan lotion Bain de Soleil, which has become the nation's number 2 suntan product.
At the end of the promotional campaign, the company wanted to test the hypothesis that the market share of its product was 0.35 versus the alternative hypothesis that the market share was higher than 0.35.
The company polled a random sample of bathers on beaches from Maine to California and Hawaii, and found that out of the sample of 3,850 users of suntan lotions, 1,367 were users of Bain de Soleil. Do you reject the null hypothesis? What is the p-value? Explain your conclusion.
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
When summarizing interval-ratio variable data using descriptive statistics, what do we lose in our understanding of a sample if we just report the mean and not any measures of dispersion such as the interquartile range or standard deviation?
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
Find the probability that a randomly selected passenger has a waiting time less than 0.75 minutes.
find probabilty that the average of those counts is more than 83.0 mosquitoes per square meter. Assume the variable is normally distributed.
My son plays for the Hooks and his average is .333. Therefore I am going to assume the probability of him getting a hit is .333 for each time he bats. In a recent game he batted three times.
Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.
byers and williams 1987 studied the impact of temperature the independent variable on the viscosity the response of
Under what conditions should you use the Chi-Square Test to determine whether there is a difference between proportions of two independent populations?
Using a spreadsheet, create a table that shows the relationship among the units of heights of people in centimeters, inches and feet in the range of 150cm to 2m. Use increments of 5cm.
Past studies indicate that only 85% of booked passengers show up for their flight. Find the probability that if the airline books 150 persons for a 140-seat plane, not enough seats will be available.
Find the area of the shaded region. Answer to the nearest tenth. Picture a square. The arcs have their centers at opposite vertices of the square and that is the region that is shaded.
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