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The ages and heights of a sample of child smokers were taken. The average age was 13.5 years, with an SD of 2.3 years. The average height was 167.5 cm, with an SD of 8.2 cm. Moreover, the correlation between age and height was 0.18. Find the regression equation for predicting height from age.
A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like to do a statistical test regarding the mean monthly mileage
Develop a marketing strategy that will increase sales and better target Toronto residents who are likely to buy the company's Smartphone and the type of plan they buy.
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
The theory underlying inferential statistics and other theoretical aspects are subjects we do not often consciously think about in our daily activities.
Researchers at the Brigham & Women's Hospital recruited 2,000 participants to study the relation between diet and cholesterol.
1.from previous polls it is believed that 66 of likely voters prefer the incumbent. a new poll of 500 likely voters
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P (high calorie, given high fiber)?
A survey asked tax accounting firms their business form (S = sole proprietorship, P = partnership, C = corporation) and type of risk insurance they carry (L = liability only, T = property loss only, B = both liability and property).
A consumer organization wants to know if there is a difference in the price of a particular toy at three different types of stores. The price of the toy was checked in a sample of five discount toy stores, five variety stores
Rum that were sold and the number of churches that were built. What do you think the explanation for this correlation might be?
q1. find the 95 confidence interval for the standard deviation of the diameter of oranges if a sample of 47 oranges
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