A study is performed in a large southern town to determinewhether the average amount spent on fod per four person family inthe town is significantly different from the national average.Assume the national average amount spent on food for a four- personfamily is $150.
A what is the null and alternative hypothesis?
b. Is the sample evidence significant? significance level?
| Family | Weekly food expense |
| 1 | $198.23 |
| 2 | $143.53 |
| 3 | $207.48 |
| 4 | $134.55 |
| 5 | $182.01 |
| 6 | $189.84 |
| 7 | $170.36 |
| 8 | $163.72 |
| 9 | $155.73 |
| 10 | $203.73 |
| 11 | $191.19 |
| 12 | $172.66 |
| 13 | $154.25 |
| 14 | $179.03 |
| 15 | $130.29 |
| 16 | $170.73 |
| 17 | $194.50 |
| 18 | $171.14 |
| 19 | $175.19 |
| 20 | $177.25 |
| 21 | $166.62 |
| 22 | $135.54 |
| 23 | $141.18 |
| 24 | $158.48 |
| 25 | $159.78 |
| 26 | $157.42 |
| 27 | $98.40 |
| 28 | $181.63 |
| 29 | $128.45 |
| 30 | $190.84 |
| 31 | $154.04 |
| 32 | $190.22 |
| 33 | $161.48 |
| 34 | $113.42 |
| 35 | $148.83 |
| 36 | $197.68 |
| 37 | $135.49 |
| 38 | $146.72 |
| 39 | $176.62 |
| 40 | $154.60 |
| 41 | $178.39 |
| 42 | $186.32 |
| 43 | $157.94 |
| 44 | $116.35 |
| 45 | $136.81 |
| 46 | $195.58 |
| 47 | $129.44 |
| 48 | $146.84 |
| 49 | $165.63 |
| 50 | $158.97 |
| 51 | $210.00 |
| 52 | $175.46 |
| 53 | $159.69 |
| 54 | $154.56 |
| 55 | $152.95 |
| 56 | $177.30 |
| 57 | $129.23 |
| 58 | $127.40 |
| 59 | $167.48 |
| 60 | $183.83 |
| 61 | $157.39 |
| 62 | $163.24 |
| 63 | $165.01 |
| 64 | $137.43 |
| 65 | $177.37 |
| 66 | $142.68 |
| 67 | $150.04 |
| 68 | $161.44 |
| 69 | $166.13 |
| 70 | $190.96 |
| 71 | $187.19 |
| 72 | $116.63 |
| 73 | $159.73 |
| 74 | $159.64 |
| 75 | $142.44 |
| 76 | $153.03 |
| 77 | $143.12 |
| 78 | $156.35 |
| 79 | $182.70 |
| 80 | $129.03 |
| 81 | $119.06 |
| 82 | $137.99 |
| 83 | $144.20 |
| 84 | $183.51 |
| 85 | $169.67 |
| 86 | $134.66 |
| 87 | $202.94 |
| 88 | $143.43 |
| 89 | $170.52 |
| 90 | $139.53 |
| 91 | $159.31 |
| 92 | $134.77 |
| 93 | $165.48 |
| 94 | $127.20 |
| 95 | $168.16 |
| 96 | $125.39 |
| 97 | $167.96 |
| 98 | $178.64 |
| 99 | $134.38 |
| 100 | $111.87 |
