The process of making a conjecture about the value of a population parameter, collecting sample data that can be used to assess this conjecture, measuring the strength of the evidence against the conjecture that is provided by the sample, and using these results to draw a conclusion about the conjecture is known as Selectone: O a. postulation O b. hypothesis testing 0 C. statistical inference Q d. empirical research The data collected from the customers in restaurants about the quality of food is an example of a(11) . O a_ observational study 0 b_ variable study 0 c_ cross-sectional study 0 d_ experimental study Fast food restaurants pride themselves in being able to fill orders quickly. A study was done at a local fast food restaurant to determine how long it took customers to receive their order at the drive thru. It was discovered that the time it takes for orders to be filled is exponentially distributed with a mean of 1.5 minutes. What is the probability density function for the time it takes to fill an order? O a. f ( x) = 5 e Ob. f ( x ) = 3 W / N O c. f ( x ) = W N e O d. None of these are correct.The t value for a 99% confidence interval estimation based upon a sample of size 10 is O a. 1.645 O b. 3.249 O c. 2.576 O d. 1.812Consider the data below. What percentage of students scored grade C? Number of students 16 28 33 13 90 O a. 37% O b. 28% O c. 31% Q d. 33% The amount of time taken by each of 10 students in a class to complete an exam is an example of what type of data? 0 a_ Time series data 0 b_ Quantitative data C) c_ Categorical data 0 d_ Cannot be determined The least squares regression line minimizes the sum of the Select one: Q a. differences between actual and predicted y values 0 b. absolute deviations between actual and predicted y values 0 C. absolute deviations between actual and predicted x values 0 d. squared differences between actual and predicted 3.! values A quantity of interest that can take on different values is known as a(n) O a_ variable 0 b_ observation 0 c_ sample 0 d_ parameter Compute the relative frequencies for the data given in the table below: Number of students O a_ 0.31,0.14,0.37,0.18 O b_ 0.16,0.28,0.33,0.13 O c_ 0.37,0.14,0.31,0.18 Q d_ 0.18, 0.31, 0.37, 0.14 Compute the relative frequency for students who earned a C shown in the table of grades below. Grades Number of Students A 10 B 31 C 36 D 6 83 O a_ 053 O b. 0.83 O c_ 0.43 Q d_ Not enough information