Consider a multiple­choice examination with 50 questions. Each question has four possible answers. Assume that a student who has done the homework and attended lectureshas a 75% probability of answering any question correctly.a. A student must answer 43 or more questions correctly to obtain a grade of A. whatpercentage of the students who have done their homework and attended lectures willobtain a grade of A on this multiple­choice examination?

Albert takes a multiple choice quiz with 25 questions, each having four answer options. What is the probability randomly guessing that Albert gets at least 20 of the 25 answers correct

Is the average time to complete an obstacle course different when a patch is placed over the right eye than when a patch is placed over the left eye? Thirteen randomly selected volunteers first completed an obstacle course with a patch over one eye and then completed an equally difficult obstacle course with a patch over the other eye. The completion times are shown below. "Left" means the patch was placed over the left eye and "Right" means the patch was placed over the right eye. Time to Complete the Course Right 48 48 50 50 44 43 49 45 Left 49 50 53 51 46 48 48 | 45 Assume a Normal distribution. What can be concluded at the the a = 0.01 level of significance level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer Select an answer Select an answer v (please enter a decimal) H: Select answer an Select an answer Select an answer v (Please enter a decimal) b. The test statistic ? v = (please show your…

Que. 7 A bag contains three green, four blue and two orange marbles. If a marble is picked at random, then the probability that it is not an orange marble, is a. b. 1/4 1/3 C. 4/9 d. 7/9

A city has 4 voting districts. Records from previous years show the proportion of registered voters that voted in previous elections for each district. A political analyst wants to see if those proportions have changed for this year's upcoming elections. The political analyst randomly samples 123 registered voters and asks them which district they live in and if they have voted yet. H0: Pa = 0.3: Pb = 0.2; Pc = 0.2; Pd = 0.3 Test the claim that there is a difference in the proportions using a α =0.01. Round all answers to at least 4 decimal places. a.) Complete the table: District: A, B, C, D; Observed: 36, 32, 19, 36 ( Respectively, matching Category Letters. Total of Observed: 123) b.) What is the chi-square test-statistic for this data? X 2=______ c. For significance level alpha , what is the chi-square Critical Value? Critical Value = _________________ d. What would be the correct conclusion for this hypothesis test?

I need to know how to calculate using a TI-84 Plus calculator.

Identify the sample chosen for the study. The number of times 13 out of 22 students on your floor order take-out in a week. Answer O All students who order take-out in a week. O The 13 students on your floor. O The 22 students on your floor.

Is the average time to complete an obstacle course different when a patch is placed over the right eye than when a patch is placed over the left eye? Thirteen randomly selected volunteers first completed an obstacle course with a patch over one eye and then completed an equally difficult obstacle course with a patch over the other eye. The completion times are shown below. "Left" means the patch was placed over the left eye and "Right" means the patch was placed over the right eye. Time to Complete the Course Right 48 44 47 40 46 41 46 48 Left 45 42 45 36 45 35 44 45 Assume a Normal distribution.  What can be concluded at the the αα = 0.10 level of significance level of significance? For this study, we should use        The null and alternative hypotheses would be:        `0:`                        `a:`                    2. The test statistic     =  (please show your answer to 4 decimal places.) 3. The p-value =  (Please show your answer to 4 decimal places.)

There are 3 red, 1 blue and 2 purple marbles in a bag. Once a marble is selected, it is replaced. What is the probability of picking a red and blue? P( red and blue) A. 0.20 O C. 0.125 O B. 0.067 O D. 0.083 to search 画。 10 $ 4 # 3 6. 8 E R T Y P S D G J K CVB M ..

Is the average time to complete an obstacle course different when a patch is placed over the right eye than when a patch is placed over the left eye? Thirteen randomly selected volunteers first completed an obstacle course with a patch over one eye and then completed an equally difficult obstacle course with a patch over the other eye. The completion times are shown below. "Left" means the patch was placed over the left eye and "Right" means the patch was placed over the right eye. Time to Complete the Course Right 40 40 41 43 49 48 45 48 Left 37 36 41 43 48 46 46 43 Assume a Normal distribution. What can be concluded at the the a = 0.05 level of significance level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Họ: pd vV (please enter a decimal) Select an answer v H1: ud vv (Please enter a decimal) Select an answer v b. The test statistic t v- (please show your answer to 3 decimal places.) c. The p-value = (Please show…