a Two sample z test for means b Two sample z test for proportions c One sample

A two sample z test for means b two sample z test for

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a) Two sample z test for means b) Two sample z test for proportions c) One sample t test for means d) One sample z test for means e) Matched pairs t test for means f) One sample z test for proportions g) Two sample t test for means Question 7 Your answer is CORRECT. A random sample of 144 cans of fruit nectar is drawn from among all cans produced in a run. Prior experience has shown that the distribution of the contents has a mean of 13.22 ounces and a standard deviation of 2.16 ounce. What is the probability that the average contents of the 144 sample cans is less than 13.00 ounces? a) 0.222 b) 0.778 c) 0.277 d) 0.889 e) 0.111 Question 8 Your answer is CORRECT. A random variable X has a probability distribution as follows: Loading [MathJax]/extensions/MathZoom.js
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12/9/2016 Print Test 4/9 X 0 1 2 3 4 P( X ) 3 k 2 k 2 k 2 k 2 k What is P(X < 2)? a) b) c) d) e) Cannot be determined. Question 9 Your answer is CORRECT. Find a value of so that . a) b) c) d) e) Question 10 Your answer is CORRECT. The following table displays the results of a sample of 100 in which the subjects indicated their favorite ice cream of three listed. The data are organized by favorite ice cream and age group. What is the probability that a person chosen at random will be under 20 years old if he or she favors chocolate? Age Chocolate Vanilla Strawberry Over 40 12 8 10 20­40 15 8 12 Under 20 11 16 8 a) 1 11 5 11 7 11 9 11 c P ( Z c ) = 0.76 1.245 0.509 −1.031 −0.867 0.706 11 38 Loading [MathJax]/extensions/MathZoom.js
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12/9/2016 Print Test 5/9 b) c) d) e) Question 11 Your answer is CORRECT. A random sample of 121 observations produced a sample proportion of 0.35. An approximate 90% confidence interval for the population proportion p is between a) 0.262 and 0.438 b) 0.307 and 0.393 c) 0.279 and 0.435 d) 0.265 and 0.435 e) 0.279 and 0.421 Question 12 Your answer is CORRECT. Data for gas mileage (in mpg) for different vehicles was entered into a software package and part of the ANOVA table is shown below: Source DF SS MS Vehicle 6 408 204.00 Error 7 327 46.71 Total 13 735 Determine the p­value for the data. a) 0.0124 b) 0.0186 c) 0.0373 d) 0.0437 89 100 11 100 11 30 27 38 Loading [MathJax]/extensions/MathZoom.js
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12/9/2016 Print Test 6/9 e) 0.4833 Question 13 Your answer is CORRECT. If the P ­value is larger than the level of significance α, then the researcher should __________ at level α. a) Fail to reject H 0 b) Accept H 0 c) Reject H 0 Question 14 Your answer is CORRECT. The one­sample t statistic for a test of H 0 : μ = 12 vs. H a : μ < 12 based on n = 19 observations has the test statistic value of t = −1.65. What is the p ­value for this test?
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