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Author Question: A previous random sample of 4000 U.S. citizens yielded 2250 who are in favor of gun control ... (Read 63 times)

jon_i

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on: Jul 24, 2018
A previous random sample of 4000 U.S. citizens yielded 2250 who are in favor of gun control legislation. How many citizens would need to be sampled for a 99 confidence interval to estimate the true proportion within 3?
 
  A) 1916 B) 1814 C) 1695 D) 1842

Question 2

A local consumer reporter wants to compare the average costs of grocery items purchased at three different supermarkets, A, B, and C.
 
  Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation, the prices were recorded for each item on the same day at each supermarket.
 
  The results of the ANOVA test are summarized in the following table.
 
  Source df Anova SS Mean Square F Value Pr > F
  Supermkt 2 2.6412678 1.3206399 39.23 0.0001
  Item 59 215.5949311 3.6541514 108.54 0.0001
  Error 118 3.9725322 0.0336655
  Corrected Total 179 222.2087311
 
  What is the value of the test statistic for determining whether the three supermarkets have the same average prices?
  A) 108.54 B) 0.0001 C) 39.23 D) 1.3206


polinasid

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Reply #1 on: Jul 24, 2018
Answer to Question 1

B

Answer to Question 2

C


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