grade divides graders into two groups icantly improves star taught using the new curriculum, while group 2 is taught using the traditional curriculum. At the end of the school year, both groups are given the standardized test and the mean scores compared. Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative. Determine whether the sampling is dependent or independent. O A. The sampling is independent because the individuals selected to be in one sample are used to determine the individuals to be in the second sample. OB. The sampling is dependent because the individuals selected for one sample do not dictate which individuals are to be in a second sample. O C. This sampling is independent because the individuals selected for one sample do not dictate which individuals are to be in a second sample. O D. The sampling is dependent because the individuals selected to be in one sample are used to determine the individuals to be in the second sample. Indicate whether the response variable is qualitative or quantitative. OA. The variable is quantitative because it is a numerical measure. OB. The variable is qualitative because it classifies the individual. O C. The variable is qualitative because it is a numerical measure. O D. The variable is quantitative because it classifies the individual.

Insurance componies track life expertancy info to assist in determining the cost of life insurance polocies. The insurance compony knows that last year the life expectancy of its polocy holders was 77 years. They want to know if their clients this year have a longer life expectancy, on average, so the company randomy samples some of the recently paid polices to see if the mean life expectancy of polcy holders has increased.   Sample: 86,75, 83, 84, 81, 77, 78, 79, 79,81, 76, 85, 70,76, 79,81, 73, 74, 72, 83. 1) Does this sample indicate that the insurance company should change its premiums because life expectancy has increased?  2) For more accurate cost determination, the insurance companies want to estimate the life expectancy to within one year with 95% confidence. How many randomly selected records would you need to have?

A second-grade teacher wants to compare scores on a reading assessment at the beginning of the year to scores on the same assessment at the end of the year. There are 28 in the class, and all students take both of the assessments. What is the degrees of freedom value for the paired-samples t test? a. 54 b. 55 c. 28 d. 27

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…

The tuition and fees (in thousands of dollars) for the top 14 universities in a recent year are listed below. Find the mean, median, and mode of the data, if possible. If any of these measures cannot be found or a measure does not represent the center of the data, explain why. 42 44 35 42 45 44 46 44 42 44 47 44 45 Q 39 C Find the mean cost. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The mean cost is (Round to one decimal place as needed.) OB. There is no mean cost. Does the mean represent the center of the data? O A. The mean represents the center. O B. The mean does not represent the center because it is not a data value. O C. The mean does not represent the center because it is the largest data value. O D. The mean does not represent the center because it is the smallest data value. O E. There is no mean cost. Find the median cost. Select the correct choice below and, if necessary, fill in the answer box to complete your…

Determine whether each sample is a random sample or a biased sample. Explain. 1. Carlos chooses 50 movies at random from a list of all his movies to determine the average runtime of the movies in his collection.

Question Help ▼ A developmental psychologist studies the number of words that seven infants have learned at a particular age. The numbers are 7, 11, 8, 1, 3, 43 , and 20. Figure the (a) mean, (b) median, and (c) standard deviation for the number of words learned by these seven infants. (d) Explain what the results mean to a person who has never had a course in statistics. (a) Find the mean. M= (Round to three decimal places as needed.) (b) Find the median. Median = (Round to three decimal places as needed.) (c) Find the standard deviation. SD = (Round to three decimal places as needed.) (d) Choose the correct answer below. O A. The mean is the average number of words learned found by dividing the total number of words learned by the number of infants in the study. The median is the middle value in the ordered list of number of words learned. The standard deviation is roughly the total amount the number of words learned for the infants differs from the mean. O B. The median is the…

Can you please do number 4,5 and 6

Explain the meaning of the specified term. Sample data

Mitchell is getting ready to take a baseball rules exam in order to becomne certified as a baseball umnpire in his local community. Past scores on the rules exam form a normal distribution with u = 80 and o = 6. Mitchell must score in the highest 25% of the distribution in order to become a certified umpire. Which minimum score does Mitchell need to obtain on the rules exam to become a certified umpire? OX= 76 O X- 84 OX= 86 OX-81