John, Debbie and Sam are discussing real, imaginary and complex numbers. PART A) John states that the product of two real numbers is a real number. Extending this to imaginary numbers John states that the product of two imaginary numbers must be imaginary. Is his statement correct? B) Sam tells the others that when multiplying a complex number by its conjugate, the solution will NOT be a real number. Is Sam's statement correct? PART C) Debbie showed John and Sam her solution to a homework problem. Looking at her final answer, John stated there must be a mistake. How did John know there was an

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant