A supplier claims the mean thickness of its washers is 0.75 inches. Washers that are too...
A supplier claims the mean thickness of its washers is 0.75 inches. Washers that are too big or too small can cause problems in the machines. A sample of 50 finds xbar = 0.73 inches and s = 0.08 inches. Test the supplier's claim.
What is the null hypothesis?
What is the p-value? Remember to consider whether it is a one-tailed or two-tailed test.
Draw a conclusion.
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A supplier claims the mean thickness of its washers is 0.75
inches. Washers that are too...
1. A baseball team claims that the mean length of its games is 2.8 hours. State...
1. A baseball team claims that the mean length of its games is 2.8 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. 2. An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than...
A baseball team claims that the mean length of its games is at most 2.5 hours....
A baseball team claims that the mean length of its games is at most 2.5 hours. State Ho and H, in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. O A. The null hypothesis expressed in words is "the mean length of a baseball team's games is not 2.5 hours. The null hypothesis is expressed symbolically as, "Hox2.5." O B. The null hypothesis expressed in words is,...
A company claims that the mean volume of the soda in its cans is 12.0 ounces....
A company claims that the mean volume of the soda in its cans is 12.0 ounces. In a random sample of 8 of its cans, the mean is found to be 12.1 ounces. Based on past research, the population standard deviation is assumed to be 0.1 ounces. Test the claim that the mean is 12.0 ounces. Use a 0.01 level of significance. a) State the null and alternative hypotheses. b) Find the value of the test statistic. Use the appropriate...
Problem 3: Too Much Salt? A nutritionist claims that children under the age of 10 years...
Problem 3: Too Much Salt? A nutritionist claims that children under the age of 10 years are consuming more than the US Food and Drug Administration's recommended daily allowance of sodium, which is 2400 mg. To test this claim, she obtains a random sample of 27 US children under the age of 10 and measures their daily consumption of sodium. Use a-0.01 a) Define the population parameter of interest in one sentence. i. State the null and alternative hvoot heses...
1. A manufacturer claims that the mean lifetime of its lithium battery is 1000 hours. A...
1. A manufacturer claims that the mean lifetime of its lithium battery is 1000 hours. A homeowner selects 40 batteries and finds the mean lifetime to be 990 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use alpha = 0.05. a. Calculate the test statistics. test statistics= (Round your answer to the nearest hundredth) Answer is not 0.79 or 0.80 2. A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency thinks that...
Hypothesis Testing Example 7: Steps in Hypothesis Testing: A manufacturer claims that the thickness of the...
Hypothesis Testing Example 7: Steps in Hypothesis Testing: A manufacturer claims that the thickness of the spearmint gum it produces is 7.5 one- hundredths of an inch. A quality control specialist regularly checks this claim. On one production run, he took a random sample of n= 10 pieces of gum and measured their thickness. The quality control specialist's hypotheses are: HO: 1. Step 1: State Hypotheses 2. Step 2: Select alpha, Draw Picture, Label Critical Values and Rejection Region(s) 3....
A baseball team claims that the mean length of its games is at most 2.5 hours. State Ho and H, in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. O A. The null hypothesis expressed in words is "the mean length of a baseball team's games is not 2.5 hours. The null hypothesis is expressed symbolically as, "Hox2.5." O B. The null hypothesis expressed in words is,...
Problem 3: Too Much Salt? A nutritionist claims that children under the age of 10 years are consuming more than the US Food and Drug Administration's recommended daily allowance of sodium, which is 2400 mg. To test this claim, she obtains a random sample of 27 US children under the age of 10 and measures their daily consumption of sodium. Use a-0.01 a) Define the population parameter of interest in one sentence. i. State the null and alternative hvoot heses...
Hypothesis Testing Example 7: Steps in Hypothesis Testing: A manufacturer claims that the thickness of the spearmint gum it produces is 7.5 one- hundredths of an inch. A quality control specialist regularly checks this claim. On one production run, he took a random sample of n= 10 pieces of gum and measured their thickness. The quality control specialist's hypotheses are: HO: 1. Step 1: State Hypotheses 2. Step 2: Select alpha, Draw Picture, Label Critical Values and Rejection Region(s) 3....
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