Homework Answers

What is the largest three digit number that you can make if you use 20 stripes?

II. Determine if one-tailed test or two-tailed test fits the given alternative hypothesis.

1. The mean height of Grade 12 students is less than 66 inches.

Answer: ___________________________

2. The standard deviation of their height is not equal to 5 inches.

Answer: ___________________________

3. Male Grade 7 and Grade 12 students differ in height on average.

Answer: ___________________________

4. The proportion of senior male students’ height is significantly higher than the senior female students.

Answer: ___________________________

5. The average grade of Grade 11 students in Statistics is lower than their average grade in Calculus.

Answer: ___________________________

I. State the null and alternative hypothesis for each statement.

1. A light bulb manufacturer claims that the mean life of a certain type of light bulb is more than 750 hours.

  H_{0: _____}

  H_{a: _____}

2. A study claims that the mean survival time for certain cancer patients treated immediately with chemotherapy and radiation is 24 months.

  H_{0: _____}

  H_{a: _____}

3. A medical trial is conducted to test whether or not a new medicine reduces uric acid by 50%.

  H_{0: _____}

  H_{a: _____}

4. We want to test whether the general average of students in Math is different from 80%.

  H_{0: _____}

  H_{a: _____}

5. We want to test whether the mean height of Grade 8 students is 58 inches.

  H_{0: _____}

  H_{a: _____}

Determine the area of the region bounded by x = y²-y-6 and x = 2y +4.

Determine the area of the region bounded by x = y²-y-6 and x = 2y +4.

Determine the area to the left of g(y) = 3-y2 and to the right of x = -1