A consumer buying cooperative tested the effective heating area of 20 different electric space heaters with different wattages. Here are the results. Hoator TAlatta go Area
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- A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. What is the critical value of z if we need to conclude that the population proportion with a history of intrapartum or postpartum infection is less than 0.25.. Two soft drink dispensing machines should dispense 8 oz of your selection into a cup. The table below shows the data Machine 1 9.52 6.41 10.07 5.85 8.15 Machine 2 8.01 7.99 7.95 8.03 8.02 Which is more consistent in dispensing soda base on the measures of dispersion? Show all solutions.The owner of a new car conducts a series of six gas mileage tests and obtains the following results, expressed in miles per gallon: 3., 22.7, 21.4, 20.6, and 21.4. 20.9. Find the mode for these data.
- A pharmaceutical company states that there is 500mg of active ingredient in each capsule for one of the medicines they manufacture. However, the FDA believes the company is purposely underfilling the capsule to save money. A sample of 20 capsules is taken and the amount of active ingredient inside is measured. The results are below: 484 460 471 512 494 529 494 485 474 502 503 538 466 495 475 529 518 464 449 489 Part 1: Construct a 95% confidence interval using toolPAK for the amount of active ingredient measured. Use the appropriate distribution, and specify the upper and lower limits of the interval. Part 2: Carefully interpret the 95% confidence interval? What if you did constructed a Confidence Interval Manually? Part 3: Does the 95% confidence interval support the FDA’s claim? Explain. Part 4: Would your answer change if the confidence level was lowered to 75%? Explain.A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the treatments had the same number of participants, then how many individuals were in each treatment?Compare the two separate scatterplots. In particular, how do the associtation compare between women with pets vs. women without pets? Does one group have more variation in systolic blood pressure than the other? If so, for which group? Does systolic blood pressure seem higher for common ages between the two groups? If so, for which group?