Mathematics, 06.04.2021 05:40 sierram298
A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study found the standard deviation to be 1.5. She thinks the mean
is 6.9 toys per year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.1 at the 80 % level of confidence? Round your
answer up to the next integer.
Answers: 1
Mathematics, 21.06.2019 13:50, tyleeonfleek36
Question and answers are in the attached picture. you so much in advance.
Answers: 3
Mathematics, 21.06.2019 22:30, brookerebman15
Find solution of the linear equation y = 2/3x + 1/3
Answers: 2
Mathematics, 22.06.2019 01:30, b2cutie456
Drag the titles to the correct boxes to complete the pairs. the probability that kevin has diabetes and the test
Answers: 3
Mathematics, 22.06.2019 02:00, mathhelppls14
1. the manager of collins import autos believes the number of cars sold in a day (q) depends on two factors: (1) the number of hours the dealership is open (h) and (2) the number of salespersons working that day (s). after collecting data for two months (53 days), the manager estimates the following log-linear model: q 4 equation 1 a. explain, how to transform the log-linear model into linear form that can be estimated using multiple regression analysis. the computer output for the multiple regression analysis is shown below: q4 table b. how do you interpret coefficients b and c? if the dealership increases the number of salespersons by 20%, what will be the percentage increase in daily sales? c. test the overall model for statistical significance at the 5% significance level. d. what percent of the total variation in daily auto sales is explained by this equation? what could you suggest to increase this percentage? e. test the intercept for statistical significance at the 5% level of significance. if h and s both equal 0, are sales expected to be 0? explain why or why not? f. test the estimated coefficient b for statistical significance. if the dealership decreases its hours of operation by 10%, what is the expected impact on daily sales?
Answers: 2
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