Question

1. The Packaging Company produces boxes out of cardboard and has a specified weight of 8 oz. A random sample of 20 boxes cans yielded a sample mean of 7.5 oz. Given the data's distribution is normally distributed and standard deviation is 1.4 oz, for a 95% confidence interval, what is the critical statistic?
2. A Chip Company claims that there is 32 oz in every bag of chips with a specified population standard deviation of 1.5. A sample of 40 bags where weighted with an sample mean of 31.4. A consumer feels that this less than what the company claims.

Which of the following gives the alternative hypothesis?

A) H₁: μ < 32

B) H₁: μ > 32

C) H₁: μ = 32

D) H₁: μ ≠ 32

3. A Chip Company claims that there is 32 oz in every bag of chips with a specified population standard deviation of 1.5. A sample of 40 bags where weighted with an sample mean of 31.4. A consumer feels that this less than what the company claims. Compute the test statistic accurate to two decimals.
4. A Chip Company claims that there is 32 oz in every bag of chips with a specified population standard deviation of 1.5. A sample of 40 bags where weighted with an sample mean of 31.4. A consumer feels that this less than what the company claims.

Which of the following gives the null hypothesis?

A) H₀: μ < 32

B) H₀: μ > 32

C) H₀: μ = 32

D) H₀: μ ≠ 32

5. HT Mean: A Packaging Company produces boxes out of cardboard and has a specified weight of 35 oz. It is known that the weight of a box is normally distributed with standard deviation 1.3 oz. A random sample of 36 boxes yielded a sample mean of 35.5 oz. At 5% level of significance, test the claim that the mean weight of a box is 35 oz or is there significant evidence that the mean weight is greater than 35 oz. Calculate the test statistic.

Answer 1