requency Target due: 5/19/20 21. A car dealer is deciding what kinds of vehicles he should order from the factory. He looks at his sales report for the preceding period. Vehicle Sales Economy Sports Family 38.5 Luxury Truck 22 5.5 11 33 Construct a Pareto chart to help him decide. 0.4 0.3
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- A medical researcher says that less than 79% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 300 adults in that country, 75% think that healthy children should be required to be vaccinated. At α=0.10, is there enough evidence to support the researcher's claim? Identify the rejection region(s). Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) Fill the answer to the correct answer A. The rejection region is <z< B. The rejection region is z< . C. The rejection region is z> . D. The rejection regions are z< and z> . (c) Find the standardized test statistic z. z= (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim. Choose a or b ▼ (A)Reject…1. an In February, Oregon had 400 thousand people attempt to register for vaccinations, but there were only 34 hundred appointment slots. What percent of the people registering received an appointment? Round to the nearest tenth of a percent b. Recently, according to Oregon Health & Science University, which operates the scheduling website and the drive-thru at the airport, the website can accommodate 4,800 users at a time and 11,000 users were online trying to book appointments at 9:01 am. Round to the nearest tenth of a percent. c. Are these two examples calculating the same thing? Explain.Q1. A lecturer wants to take a sample of 40 students from a class of 160 to complete a survey on the module. In the past they have tried three ways: asking the first 40 students who turn up to lectures, emailing a survey to the entire class and hope 40 respond or ask each student in lecture to toss a coin twice and select the students who get two heads. Which approach would you prefer and why, or does it matter? Q2 A researcher is interested in the average age people first develop symptoms of a particular condition they are investigating. They record the ages of first developingsymptoms from 30 random people (below) who have been involved in a recent large trial on managing the condition. 25, 19, 60, 76, 52, 42, 56, 99, 61, 42, 70, 23, 23, 19, 18, 54, 72, 18, 42, 33, 42, 19, 41, 24, 67, 70, 23, 21, 30, 22i. Are there any outliers in the sample? If so, should you keep them in the rest of the analysis or not? ii. Calculate a 90% and 99% confidence interval for the average age of first…
- I am considering 3 types of diet (keto, vegetarian, low-carb, Mediterranean) to improve my physique. To optimize I would like to check 2 dosages - small and medium serving size. If I will follow a one-fourth fractional factorial design of experiment, how many runs do I need to do? Show complete solution.The manufacturer of an MP3 player wanted to know whether a 10% reduction in price is enough to increase the sales of its product. To investigate, the owner randomly selected 8 outlets and sold the MP3 player at the reduced price. At 7 randomly selected outlets, the MP3 player was sold at the regular price. Reported below is the number of units sold last month at the regular and reduced prices at the randomly selected outlets. Regular (7 outlets) - 138, 127, 129, 114, 114, 126, 98 Reduced (8 outlets) - 122, 135, 151, 133, 113, 129, 134, 133 At the 0.050 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales? Hint: for the calculations, assume the reduced price as the first sample. Compute the pooled estimate of the variance (round to 3 decimal places) Compute the test statistic (round to 2 decimal places)4. I am considering 3 types of diet (keto, vegetarian, low-carb) to improve my physique. To optimize I would like to check 3 dosages – small, medium, and large serving size. If I will follow a one-six fractional factorial design of experiment, how many runs do I need to do? Show complete solution.
- A consumer-testing agency wants to evaluate the claim made by a manufacturer of discount tires. The manufacturer claims that its tires can be driven at least 35,000 miles before wearing out. To determine the average number of miles that can be obtained from the manufacturer’s tires, the agency randomly selects 60 tires from the manufacturer’s warehouse and places the tires on 15 cars driven by test drivers on a 2-mile oval track. The number of miles driven (in thousands of miles) until the tires are determined to be worn out is given in the following table. Car Miles Driven 1 25 2 27 3 35 4 42 5 28 6 37 7 40 8 31 9 29 10 33 11 30 12 26 13 31 14 28 15 30 Average 31.47 Standard 5.04 Agency would like to know if the manufacturer’s claim is false. Carryout an appropriate hypothesis test (use 1% significance level). Check any assumptions you think are relevant before doing the text.Last year 46% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicated that 35% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners. How many business owners in the survey plan to provide a holiday gift to their employees this year?The business college computing center wants to determine the proportions of business students who have pesonal computers (PC's) at home. If the proportions differs from 30%, then the lab will modify a proposed enlargement of its facilities. Suppose a hypothesis test is conducted test is conducted and the test statistic is 2.74. Find the P-value for a test of hypothesis.