In a test of the effectiveness of herbal medicine against cold viruses, 53 out of 79 subjects treated with it developed the virus. In the placebo group, 81 out of 100 subjects developed the virus. Use a 1% significance level to test the claim that the placebo and drug groups differ. Note that the same setup is used for problems 22-25 What is the correct hypothesis set up from the formula sheet and which formulas have to be used here

Simplify the following expression 48^1/2

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec

Write the equation of the line that passes through (3, 4) and (2, −1) in slope-intercept form. (2 points) y = 3x − 7 y = 3x − 5 y = 5x − 11 y = 5x − 9