Two professors at a local college developed a now teaching curriculum designed to increase students' grades in math classes. in a typical developmental math course, 45% of the students complete the course with a letter grade of a, b, or c. in the experimental course, of the 20 students enrolled, 18 completed the course with a letter grade of a, b, or c. is the experimental course effective at the alpha = 0.05 level of significance? identity the correct null and alternative hypotheses. h_0: p = 0.45 versus h_1: p > 0.45 determine the p-value. p-value = (round to three decimal places as needed.)

We can conclude that the experimental course effective at the alpha = 0.05 level of significance.

Step-by-step explanation:

Let p be the proportion of students from experimental course who complete the course with a letter grade of A, B, or C. Null and alternative hypotheses are:

H_0: p = 0.45

H_1: p > 0.45

Test statistic can be found using the equation

where

Then ≈4.045

Since the one tailed 19 degrees of freedom p-value is ≈0.0003<0.05 we can conclude that the experimental course effective at the alpha = 0.05 level of significance.

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )

i do not know the answer

step-by-step explanation: