Twelve homemakers were asked to estimate the retail selling price of two models of refrigerators. Suppose their estimates of selling price are shown in the following table. Homemaker 1 2 3 4 5 6 7 8 9 10 11 12 Model 1 ($) 840 950 930 900 Find the value of the test statistic. T+ = 800 820 910 880 1,100 690 810 930 Model 2 ($) 1,130 930 840 1,090 1,160 990 1,090 1,140 1,200 870 890 880 Use these data and test at the 0.05 level of significance to determine whether there is a difference between the two models in terms of homemakers' perceptions of selling price. State the null and alternative hypotheses. O Ho: Median price for model 1 - Median price for model 2 20 H₂: Median price for model 1 - Median price for model 2 < 0 O Ho: Median price for model 1 - Median price for model 2 + 0 H₂: Median price for model 1 - Median price for model 2 = 0 O Ho: Median price for model 1 - Median price for model 2 = 0 H₂: Median price for model 1 - Median price for model 2 #0 O Ho: Median price for model 1 - Median price for model 2 < 0 H₂: Median price for model 1 - Median price for model 2 = 0 O Ho: Median price for model 1 - Median price for model 2 ≤ 0 H₂: Median price for model 1 - Median price for model 2 > 0 Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Do not reject Ho. There is sufficient evidence to conclude that there is a significant difference between the two models in terms of homemakers' perceptions of selling price. O Do not reject Ho. There is not sufficient evidence to conclude that there is a significant difference between the two models in terms of homemakers' perceptions of selling price. O Reject Ho. There is not sufficient evidence to conclude that there is a significant difference between the two models in terms of homemakers' perceptions of selling price. ● Reject Ho. There is sufficient evidence to conclude that there is a significant difference between the two models in terms of homemakers' perceptions of selling price.

Derby collects samples of insects in the forest and in a marsh to count the number of insects in each sample and then releases the insects. The number of insects in each sample from the two locations is provided below. Forest 1515 1313 1414 99 1616 1111 1515 1414 1515 1414 Marsh 1717 1414 1515 1717 1616 1818 1717 1919 1313 1616 What is the median and the interquartile range for each of the two locations? Round to one decimal place. The median number of insects in the forest samples is , and the interquartile range is . The median number of insects in the marsh samples is , and the interquartile range is .

7h.  A travel association reported the domestic airfare (in dollars) for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years. CurrentYear PreviousYear 345 315 526 451 420 450 216 206 285 263 405 432 635 585 710 650 605 545 517 547 570 496 610 580   Calculate the test statistic. (Use current year airfare − previous year airfare. Round your answer to three decimal places.)   Calculate the p-value. (Round your answer to four decimal places.) p-value =

A sales manager recorded the number of sales made by each of the 300 salespeople working athis chain of furniture outlet stores on a Saturday and created the following table.# Sales (bins) Proportion of salespeople in this bin0 – 3 0.053 – 6 0.156 – 9 0.30 9 – 12 0.3512 -15 0.15a. What is the unit of observation in this sample?b. What is the variable collected?c. Draw and label the histogram for this dataset.d. Which is the modal category?e. Calculate the proportion of the salespeople made 9 or more sales.f. Calculate the number of salespeople who made between 0 and 9 sales.