1. The manufacturer of the X-15 steel belted radial truck tire claims that the mean mileage the tire can be dri9ven before the tread wear out is 60,000 miles. The population standard deviation of the mileage is 5,000 miles. Crosset Truck Company bought 48 tires and found that the mean mileage fo5r its trucks is 59,500. Is the Crosset’s experience different from that claimed bt yhe manufacturer at the 0.05 significance level?
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 340, number 5) The solution of one sample hypothesis no 1

  2. The MacBurger restaurant chain claims that the mean waiting time of customers is 3 minutes with a population standard deviation of 1 minue. The quality assurance department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. At the 0.05 siginificance level, can we conclude that the mean waiting time is less than 3 minutes?
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 340, number 6) The solution of one sample hypothesis no 2
  3. A recent national survey found that high scholl students watched an average (mean) of 6.8 DVDs permont with a population standard deviation 0rf 0.05 hours. A randon sample of 36 college students reaveated that the mean number of DVDs matched last month was 6.2. At the 0.05 level of siginificance, can we coclude that the college students watch fewer DVDs a month than high scholl students?
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 340, number 7) The solution of one sample hypothesis no 3
  4. Given the following hypothesis,
    A random sample of five resulted in the following values: 18, 15, 12, 19 and 21. Using the 0.01 siginificance level, can we conclude the population mmean is less than 20?
    1. State the decision rule
    2. Compute the value of the test statistic
    3. What is your decision regarding the null hypotheses
    4. Estimate tha p value
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 348, number 15) The solution of one sample hypothesis no 4
  5. The following hypotheses are given (see in the text book) A sample of 100 ovservations revealed that p = 0.75. At the 0.05 siginificance level, can the null hypotheses be rejected?
    1. State the decision rule
    2. Compute the value of the test statistic
    3.What is your decision rule regarding the null hypotheses
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 352, number 21) The solution of one sample hypothesis no 5
  6. Tinggi rata-rata mahasiswi tingkat persiapan di suatu perguruan tinggi adalah 162.5 cm dengan simpangan baku 6.9 cm. Apakah ada alasan untuk mempercayai bahwa telah terjadi perubahan dalam tinggi rata-rata mahasiswi bila suatu sampel acak 50 mahasiswi tingkat persiapan mempunya tinggi rata-rata 165.2 cm ? gunakan taraf nyata 0.02
    (Ronald E Walpole., Pengantar Statistika., PT gramedia Pustaka Utama, Jakarta, Edisi ke 3, Soal-soal latihan halaman 309, nomor 3 ) The solution of one sample hypothesis no 6
  7. Menurut Dietary Goals for the united stated (1977) konsumsi sodium yang tinggi mungkin berhubungan dengan sakit bisul, kanker perut dans akit kepala. Manusia membutuhkan garam hanya 220 miligram per hari dan ini sudah dilampaui oleh kandungan satu porsi sereal siap makam. Bila suatu sampel acak 20 porsi sereal mempunyai kandungan sodium rata-rata 244 miligram dengan simpangan baku 24.5 miligram, apakah ini menunjukkan pada taraf nyata 0.05 bahwa kandungan sodium rata-rata satu porsi sereal lebih dari 220 miligram ?
    (Ronald E Walpole., Pengantar Statistika., PT gramedia Pustaka Utama, Jakarta, Edisi ke 3, Soal-soal latihan halaman 309, nomor 6 ) The solution of one sample hypothesis no 7
  8. Di suatu perguruan tinggi diduga kurang dari 25% mahasiswa membawa mobil pribadi ke kampus. Apakah dugaan diatas dapat diterima bila diantara 90 mahasiswa yang diambil secara acak terdapat 28 orang yang membawa mobil pribadi ke kampus? Gunakan taraf nyata 0.05
    (Ronald E Walpole., Pengantar Statistika., PT gramedia Pustaka Utama, Jakarta, Edisi ke 3, Soal-soal latihan halaman 323, nomor 5 ) The solution of one sample hypothesis no 8
  9.  A recent article in the Wall Strees Journal reported that the 30- year mortgage rate is now less than 6 percent. A Sample of eight small banks in the Midwest revealed the following 30-year rates (in percent) 4.8     5.3     6.5     4.8     6.1     5.8     6.2     5.6
    At the 0.01 significance level, can we conclude that the 30 year mortgage rate for small banks is less than 6 percent ? Estimate the p value
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 358, number38) The solution of one sample hypothesis no 9
  10. The postanethesia care area (recovery room) at St Lauke’s Hospital in Maumee, Ohio was recently enlarged. The hope was that with the enlargement the mean number of patient per day would be more than 25. A random sample of 15 days revealed the following numbers of patients. 25  27      25      26      25      28      28      27      24      26      25      29      25      27      24
    At 0.01 significance level, can we conclude that the mean number of patients per day is more than 25. Estimate the p value and interpret it
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 358, number40) The solution of one sample hypothesis no 10
  11. According to study by an American Pet Food Dealers association, 63 percent of US households own pets. A report is being prepared for an editorial in the San Fransisco Chronicle, as a part of the editorial a random sample of 300 households showed 210 own ptes. Does this data disagree with the pet Food Dealers association data ? use a 0.05 level of significance
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 358, number 50) The solution of one sample hypothesis no 11
  12. The policy of the suburban Transit Authority is to add a bus route if more than 55 percent of the potential commuters indicate they would use the particular route. A sample of 70 commuters revealed that 42 would use a proposed route from Bowman Park to the downtown area. Does the Bownman to downtown roué meet the STA criterion > Use the 0.05 significance level
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 358, number 52) The solution of one sample hypothesis no 12 
  13.  Listed below is the rate of return for one year (reported in percent) for a sample of 12 mutual funds that are classified as taxable money market funds
    4.63        4.15    4.76    4.70    4.65    4.52    4.70    5.06    4.42    4.51    4.24    4.52
    Using the 0.05 siginificance level is it reasonable to conclude that the mean rate of return is more than 4.50 percent
    (Lind, Marchal, wathen., Statistical Techinique in Business and Economics., Mac Graw Hill., Fourteeth edition., page 358, number44) The solution of one sample hypothesis no 13