Doncouse_Jeremy_Week7

# Doncouse_Jeremy_Week7 - Jeremy Doncouse ID: 92575 2 MATH116...

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Unformatted text preview: Jeremy Doncouse ID: 92575 2 MATH116 4 14 a. Best point estimate of the mean. 92 b. Find 95% confidence interval. c. 95% confidence interval if n = 60 6 d. Which interval is smaller? Why? The sample of 60 golfers yields a smaller interval because the size of the population increased. 16 8 47 95 54 33 64 4 8 57 8 90 3 49 4 44 79 80 68 7 15 21 52 6 78 109 29 9 48 40 80 16 50 Mean = 43.45 14 Section 7.3 Section 7.1: (Page 364) 14,16,18,20,24 Section 7.2: (Page 372) 4,8,12,14,16,18 Section 7.3: (Page 380) 2,4,6,8,14,16,18,20 (any 5) Section 7.4: (Page 388) 3,4,6,8,10,12 Section 7.1: (Page 364) 14,16,18,20,24 Golf Averages. N = 35, Mean = 92, = 5. Number of Farms. Estimate mean with 90% confidence. Assume = 31. = 31 + &lt; &lt; - n z X n z X 2 2 + &lt; &lt; - 35 5 96 . 1 92 35 5 96 . 1 92 05 . 95 . 1 2 =- = z 975 . 025 . 1 025 . 2 / 05 . 2 =- = = = 96 . 1 975 . = 66 . 93 34 . 90 &lt; &lt; = + &lt; &lt; - 60 5 96 . 1 92 60 5 96 . 1 92 27 . 93 73 . 90 &lt; &lt; = + &lt; &lt; - n z X n z X 2 2 65 . 1 2 = z + &lt; &lt; - 31 65 . 1 45 . 43 31 65 . 1 45 . 43 18 wanted to keep tuition low, what would be reasonable? 3 To keep tuition low a reasonable amount to charge would be \$3,357 20 4 confidence. 24 Cost of Pizzas. 95% confidence. What should n = to be accurate within 0.15? A 6 4 Find the values for each: a. n =18 for 99% confidence interval for the mean. 2.9 8 b. n = 23 for the 95% confidence interval for the mean. 2.07 c. n = 15 for the 98% confidence interval for the mean. 2.62 d. n = 10 for the 90% confidence interval for the mean. 1.83 e. n = 20 for the 95% confidence interval for the mean. 2.09 8 State Gasoline Taxes. N = 12, 90% confidence interval. Does your interval contain the national average of 21 cents?...
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## This note was uploaded on 03/08/2011 for the course MATH 116 taught by Professor Unknown during the Fall '09 term at Mountain State.

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Doncouse_Jeremy_Week7 - Jeremy Doncouse ID: 92575 2 MATH116...

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