Brad, a professor in the walton college of business, has taught data analysis for 3 years historically, during that time, his average grade is 70% with a standard deviation of 5%. he is disappointed in the results of his students and decides to try different teaching methods to improve their grades. in the spring of 2016, he develops on-line videos as a supplement to his class lecture. during that semester, his average grade is 71% from a sample of 49 students. the level of significance is 2.5%. what hypotheses is brad testing? 0 h0: μ .70 and ha: μ < .70 0 h0: μ s .71 and ha: μ > .71 0 h0: μ .70 and ha: μ > .70

H0: μ= .70 and HA: μ > .70

Step-by-step explanation:

Brad wants to test if on-line videos as a supplement to his class lecture improved student's grades.

For this he needs to assume H0: μ= .70 and HA: μ > .70 and check if the sample mean is in the critical region in 2.5% confidence level. If it is, then he will reject the null hypothesis in favor of alternative hypothesis. If not, he will fail to reject the null hypothesis.

8

step-by-step explanation:

to find the amount of gift bags to use all the supplies, find the gcf or greatest common factor. this is the largest number which multiplies evenly into each term.

48 has factors: 1, 2, 3, 4, 6, 8, 12. 16, 24, 48

80 has factors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

64 has factors: 1, 2, 4, 8, 8, 16, 32, 64

the highest number factor they all share in common is 8. this means there will be 8 bags with 6 pencils, 10 markers, and 8 stickers in each bag.