University personnel are concerned about the sleeping habits of students and the negative impact on academic performance. in a random sample of 377 u. s. college students, 209 students reported experiencing excessive daytime sleepiness (eds). is there sufficient evidence to conclude that more than half of u. s. college students experience eds? use a 5% level of significance. hide instructions 1–8 part a. test of significance

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Select the correct answer and solve for y