Blog

Vocabulary Section Choose the best possible completion of the sentences. (0.5×4=2pts) レストランの [1]があります。 あしたはテストです。[2]、たくさんべんきょうします。 Happy Mealは[3]のハンバーガーメニューです。 らいしゅう、しゅっしんの [4]に かえります。

Kanji Section Change highlighted Hiragana to Kanji. (0.5×4=2pts) (1) おかね (2) かようび Change Kanji to Hiragana. (0.5×4=2pts) (1) 三時半 (2) 一月

Before submitting the test, show your written answers to the camera.

17. An economist increases the confidence level from 90% to 99% assuming all else stays the same. What happens to the confidence interval?

21. If the sample size being used to calculate confidence is increased from 100 to 900, while everything else stays the same, which of the following is true about the margin of error?

34. If the actual satisfaction rate is 70% (p = 0.70), what is the approximate power of the test? Round your answer to nearest number in terms of percentage

9. A population distribution of household income is heavily right-skewed. A student observes this data and notes: “Sample averages from samples of size n=100 will also be heavily skewed.” Which response is the best?

Use the following scenario to answer questions 32-35. A restaurant chain claims that at least 75% of its customers are satisfied with their dining experience.  A business analyst wants to test this claim.  A random sample of 200 customers is surveyed and 140 report being satisfied.  The analyst provides the power curve shown below.                                              32. What is the correct alternative hypothesis?

19. A 95% confidence interval for the proportion of consumers delaying major purchases is (0.41, 0.49). Which statement is correct?

22. To conduct the hypothesis test about the population proportion, once the hypotheses are stated, we always begin the test by assuming