Q2. A bag contains 10 discs with one of the digits 1, 2, 3 written on each disc. What is the lowest and highest possible average of the numbers on the discs? A. Lowest average = -10 and highest average 30. B. Lowest average = 10 and highest average 30. C. Lowest average = 0.1 and highest average 3. D. Lowest average = 1 and highest average 3.

Assuming a population of interest is approximately normally distributed, construct a 95% confidence interval estimate for the population mean given the following values: Sample mean = 30; %3| Sample standard deviation =3.5; Sample size =15

Which is the least number?   A. −1.4    B. −138    C. −1.3    D. −54

Is the average time to complete an obstacle course longer when a patch is placed over the right eye than when a patch is placed over the left eye? Eight 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. Right 40 46 42 45 40 48 42 42 Left 38 46 41 45 36 45 39 43 Assume a Normal distribution.  What can be concluded at the the αα = 0.05 level of significance level of significance? For this study, we should use        The null and alternative hypotheses would be:        H0:H0:                  (please enter a decimal)     Ha:Ha:                  (Please enter a decimal) The test statistic     =  (please show your answer to 3 decimal places.) The p-value =  (Please show your answer to 4 decimal places.) The…

The height (at the shoulder) of seven dogs (in inches) are 15, 26.5, 11.1, 13.5, 6.7, 8.3, 13.7. Find the IQR of the height. Group of answer choices 1.5 19.8 6.7 12.3 8.3

A home pregnancy test was given to women, then pregnancy was verified through blood tests. The following table shows the home pregnancy test results.   Positive Negative Total Pregnant 54 9 63 Not Pregnant 4 55 59 Total 58 64 122 Round your answers to the nearest thousandth.PP(positive∣∣pregnant) = PP(pregnant∣∣positive) = PP(negative∣∣pregnant) = PP(not pregnant∣∣negative) =

A college chemistry instructor thinks the use of embedded tutors will improve the success rate in introductory chemistry courses. The passing rate for introductory chemistry is 73%. During one semester, 200 students were enrolled in introductory chemistry courses with an embedded tutor. Of these 200 students, 162 passed the course. The instructor carried out a hypothesis test and found that the observed value of the test statistic was 2.55. The p-value associated with this test statistic is 0.0054. Explain the meaning of the p-value in this context. Based on this result, should the instructor believe the success rate has improved? State the hypotheses that were used for the test Choose the correct answer below. OA. Ho: p=0.73 and Ha: p>0.73 OB. Ho: p0.73 OC. Ho p=0.73 and Ha: p0.73 and Ha: p<0.73 OE. Ho: p=0.73 and Ha: p# 0.73 Explain the meaning of the p-value in this context. Select the correct choice below and fill in the answer box within your choice. (Type an integer or a decimal.…

The mean of 5 numbers is 20. If one number is excluded their mean is 15. Then the excluded number is O a. 20 Ob. O b. 40 О с. 5 O d. 10