Consider a value to be significantly low if its z score less than or equal to minus2 or consider a value to be significantly high if its z score is greater than or equal to 2. a test is used to assess readiness for college. in a recent year, the mean test score was 21.3 and the standard deviation was 5.1. identify the test scores that are significantly low or significantly high. what test scores are significantly low? select the correct answer below and fill in the answer box(es) to complete your choice. a. test scores that are between nothing and nothing. (round to one decimal place as needed. use ascending order.) b. test scores that are less than nothing. (round to one decimal place as needed.) c. test scores that are greater than nothing. (round to one decimal place as needed.)

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it. find the area of the sidewalk.

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

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?