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Does background music influence the scores of college students on a reading comprehension test? Sets of 10 randomly selected students take a reading comprehension test with rock, country-western, or classical music in the background. The results are as follows (higher scores reflect better comprehension)
Reading Comprehension Scores
Rock (1) Country Western (2) Classical (3)
90 99 52
11 94 75
82 95 91
67 23 94
98 72 97
93 81 31
73 79 83
90 28 85
87 94 100
84 77 69
(a) Why might the H test be preferred to the F test for these data?
(b) Use H to test the null hypothesis at the .05 level of significance
Previous information suggests that the percentage nonconforming is approximately 4%. How large a sample must be chosen?
For each of the following, state whether a one-proportion z-test or a two-proportion z-test would be appropriate, and name the populations.
Conditions to perform inference in regression
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The Hammaker Company's newest product has had the following sales during its first five months: 5 17 29 41 39. The sales manager now wants a forecast of sales in the next month. (Use hand calculations rather than an Excel template)
Roberta scored in the 85th percentile on a standardized test of reading ability. What is Roberta's associated z score?
Summer Time, Inc. is considering a new 3-year project that requires an initial fixed asset investment of 3.9 million.
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suppose that the proportions of blood phenotypes in a particular population are as followsa nbspnbspb nbspnbspab
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A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
Number of STAT 200 textbook bundles you would order so that you stay below 5% probability of having to back-order from Pearson Custom Publishing?
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