Mathematics > QUESTIONS & ANSWERS > UNIT 5 — MILESTONE 5 quiz 2022 (All)

UNIT 5 — MILESTONE 5 quiz 2022

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The t-test statistic for a two-sided test would be __________. Answer choices are rounded to the hundredths place.  -0.70  -2.87  -1.44  -1.39 RATIONALE Using the information gi... ven, we need to find the sample mean: We now know the following information: Let's plug in the values into the formula: CONCEPT T-Tests 2. Which of the statements about one-way ANOVA is FALSE?  The purpose of one way ANOVA is to verify whether the data collected from different sources converge on a common mean.  ANOVA deals only with one factor, such as treatment or group.  There can be any number of levels in one-way ANOVA.  It is used when there are two independent variables in the experiment. RATIONALE When we do the one-way ANOVA we are trying to examine if the means of multiple groups are equal or not. We aren't testing independence of the variables, that is what we do with a chisquare test for independence. CONCEPT One-Way ANOVA/Two-Way ANOVA 3 One condition for performing a hypothesis test is that the observations are independent. Mark is going to take a sample from a population of 400 students. How many students will Mark have to sample without replacement to treat the observations as independent?  40  80  360  300 RATIONALE In general we want about 10% or less to still assume independence. So size = 0.1*N = 0.1(400) = 40 A sample of 40 or less would be sufficient. CONCEPT Sampling With or Without Replacement 4 Joe hypothesizes that the average age of the population of Florida is less than 37 years. He records a sample mean equal to 37 and states the hypothesis as μ = 37 vs μ < 37. What type of test should Joe do?  Left-tailed test  Right-tailed test  Two-tailed test  Joe should not do any of the types of tests listed RATIONALE Since the Ha is a less than sign, this indicates he wants to run a 1 tailed test where the rejection reg [Show More]

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