Explain the meaning of type I and type II errors.

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Chapter 9.2, Problem 51E

To determine

Explain the meaning of type I and type II errors.

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2) Assume you are conducting a hypothesis test to determine if pesticides cause cancer in rural areas. The hypotheses are: The null hypothesis is no cancer. The alternate hypothesis is cancer. Select if the result for Box D is correct, a Type I error, a Type II error or if there is insufficient information to make the decision.

In Exercises, hypothesis tests are proposed. For each hypothesis test, a.determine the null hypothesis.b.determine the alternative hypothesis.c.classify the hypothesis test as two tailed, left tailed, or right tailed. Iron Deciency? Iron is essential to most life forms and to normal human physiology. It is an integral part of many proteins and enzymes that maintain good health. Recommendations for iron are provided in Dietary Reference Intakes, developed by the Institute of Medicine of the National Academy of Sciences. The recommended dietary allowance (RDA) of iron for adult females under the age of 51 years is 18 milligrams (mg) per day. A hypothesis test is to be performed to decide whether adult females under the age of 51 years are, on average, getting less than the RDA of 18 mg of iron.

Research Question: Do 60% of student prefer iPhone and 40% prefer Android? A Lecturer is interested in the type of Mobile phone students use. He surveyed a sample of 45 male and female students and asked them whether they use iPhone or Android. IPhone Android Total Observe 25 20 45 Perform an appropriate hypothesis test to answer the above research question. -Enter the values for H0. H0:π1= π2= -The alternate hypothesis is: (Choose from A or B or C) A. H0:π1≠π1≠ 0.6 B. The proportions are not as stated C. Something else From the following sample, calculate the expected number in each group (to two decimal places) and place your answers in the boxes provided. iPhone Android Total Observed Expected 25 ? 20 ? 45 45 The assumption is: Choose from below -The boxplots indicate that the samples are fairly symmetric and the spreads are similar, so we can assume both sets of data come from normal distributions with…