Mathematics, 05.12.2019 02:31 lilbaby1433
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. a random sample of 60 people used the new toothpaste for 6 months. the mean number of cavities at their next checkup is 1.5. in the general population, the mean number of cavities at a 6-month checkup is 1.73 (σ = 1.12). a. is this a one- or two-tailed test? b. what are h0 and ha for this study? c. compute zobt. d. what is zcv? e. should h0 be rejected? what should the researcher conclude? f. determine the 95% confidence interval for the population mean, based on the sample mean.
Answers: 1
Mathematics, 21.06.2019 17:50
Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00
Answers: 1
Mathematics, 21.06.2019 20:30
Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.
Answers: 3
Mathematics, 21.06.2019 23:50
4. (10.03 mc) the equation of line cd is y = −2x − 2. write an equation of a line parallel to line cd in slope-intercept form that contains point (4, 5). (4 points) y = −2x + 13 y = negative 1 over 2 x + 7 y = negative 1 over 2 x + 3 − 2x − 3
Answers: 2
Mathematics, 22.06.2019 00:30
Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers: (−2)^a/4^b 2. evaluate powers: c/d select the value of each variable. a = _ b = _ c = _ d = _
Answers: 3
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpas...
Mathematics, 01.10.2021 02:50
Chemistry, 01.10.2021 02:50
Mathematics, 01.10.2021 02:50
Mathematics, 01.10.2021 02:50
Mathematics, 01.10.2021 02:50
Social Studies, 01.10.2021 02:50
Mathematics, 01.10.2021 02:50