Homework Answers
Ans:
Left tailed test,as we want to test if standard deviation is less than 0.052
Option c is correct.
vs.
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10. A manufacturing firm produces a part for which the standard deviation in the diameter must...
The following are multiple choice problems. Please choose the best (closet) answer if you can not find the exact one...
The following are multiple choice problems. Please choose the best (closet) answer if you can not find the exact one. Problem 1. (15pts) A randomly selected group of cach were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The SSATL scores are summarized below: American Japanese Sample Size Mean SSATL Score 211 100 65.75 79.83 Standard deviation 11.07 6.41 (1) Give the null and alternative hypothesis to determine if the average SSATL score...
An engineer wants to know if the mean strengths of three different concrete mix designs differ...
An engineer wants to know if the mean strengths of three different concrete mix designs differ significantly. He randomly selects 9 cylinders that measure 6 inches in diameter and 12 inches in height in which mixture A is poured, 9 cylinders of mixture B, and 9 cylinders of mixture C. After 28 days, he measures the strength (in pounds per square inch) of the cylinders. The results are presented in the accompanying table. Click the icon to view the data...
all of these pls D) In repeated sampling, 95% of the sample means will fall within the interval created. 4) A retired statistician was interested in determising the average cost of a $200,000.00 t...
all of these pls
D) In repeated sampling, 95% of the sample means will fall within the interval created. 4) A retired statistician was interested in determising the average cost of a $200,000.00 term lle insurance policy for a 60-year-old male non-smoker. He randomly sampled 63 subjects (60-year-old male non-smokers) and constructed the following 95 percent c mean cost of the term life insurance: ($850.00, $1050.00) State the appeopriate confidence interval for the interpretation for this term life insurance cost...
Please Help me with this Questions A software design firm has developed a prototype educational computer...
Please Help me with this Questions
A software design firm has developed a prototype educational computer game for children. One of the important factors in the success of a game like this is the time it takes the child to play the game. Two factors are important: the mean time it takes to play and the variability in time required from child to child. Experience indicates that the mean time should be 11 minutes or less and the standard deviation...
Part A Suppose you work for a political pollster during an election year. You are tasked...
Part A Suppose you work for a political pollster during an election year. You are tasked with determining the projected winner of the November election. That is, you wish to determine if the number of votes for Candidate 1 is greater than the votes for Candidate 2. What are the hypotheses for this test? 1) HO: μ1 < μ2 HA: μ1 ≥ μ2 2) HO: μ1 ≥ μ2 HA: μ1 < μ2 3) HO: μ1 ≤ μ2 HA: μ1 >...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood cholesterol levels. The table shows the total blood cholesterol levels (in milligrams per deciliter of blood) of seven patients before eating the cereal and after one year of eating the cereal as part of their diets. Use technology to test the mean difference. Assume the samples are random and dependent, and the population is normally distributed. At a = 0.05, can you...
An insurance agent says the standard deviation of the total hospital charges for patients involved in...
An insurance agent says the standard deviation of the total hospital charges for patients involved in a crash in which the vehicle struck a construction barricade is less than $3100. A random sample of 22 total hospital charges for patients involved in this type of crash has a standard deviation of $3500. At a = 0.01 can you support the agent's claim? Use the P-value method to test the claim. Identify the null and alternative hypotheses. Let o be the...
Hi all the answers are given on this worksheet I just need to know how to do part (e) and calcula...
Hi all the answers are given on this worksheet I just need to
know how to do part (e) and calculate the two numbers in my TI-84.
(I use my TI-84 to get z and p-value)
Problem 4: Two Proportions In 1995, the American Cancer Society randomly sampled 1500 adults of which 555 smoked. In 2005, they surveyed 1730 adults and ound that 578 of them smoked. At the 5% level of significance test the claim that the proportion of...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood cholesterol levels. The table shows the total blood cholesterol levels (in milligrams per deciliter of blood) of seven patients before eating the cereal and after one year of eating the cereal as part of their diets. Use technology to test the mean difference. Assume the samples are random and dependent, and the population is normally distributed. At a 0.05, can you conclude...
8-6 (Testing a Claim about a Standard Deviation or Variance) 1) Which T1-83. or TI-84 automatic...
8-6 (Testing a Claim about a Standard Deviation or Variance) 1) Which T1-83. or TI-84 automatic calculator function will you use in this section? a) 1-PropZTest b ) T-Test c) X-Test (d) None of these. 2) When a SRS of 40 people used 'Diet A' for one year, their weight losses had standard deviation 49 lbs. Use a 0.01 significance level to test the claim that the population standard deviation of all users of "Diet A' is 6.0, which is...
The following are multiple choice problems. Please choose the best (closet) answer if you can not find the exact one. Problem 1. (15pts) A randomly selected group of cach were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The SSATL scores are summarized below: American Japanese Sample Size Mean SSATL Score 211 100 65.75 79.83 Standard deviation 11.07 6.41 (1) Give the null and alternative hypothesis to determine if the average SSATL score...
An engineer wants to know if the mean strengths of three different concrete mix designs differ significantly. He randomly selects 9 cylinders that measure 6 inches in diameter and 12 inches in height in which mixture A is poured, 9 cylinders of mixture B, and 9 cylinders of mixture C. After 28 days, he measures the strength (in pounds per square inch) of the cylinders. The results are presented in the accompanying table. Click the icon to view the data...
all of these pls
D) In repeated sampling, 95% of the sample means will fall within the interval created. 4) A retired statistician was interested in determising the average cost of a $200,000.00 term lle insurance policy for a 60-year-old male non-smoker. He randomly sampled 63 subjects (60-year-old male non-smokers) and constructed the following 95 percent c mean cost of the term life insurance: ($850.00, $1050.00) State the appeopriate confidence interval for the interpretation for this term life insurance cost...
Please Help me with this Questions
A software design firm has developed a prototype educational computer game for children. One of the important factors in the success of a game like this is the time it takes the child to play the game. Two factors are important: the mean time it takes to play and the variability in time required from child to child. Experience indicates that the mean time should be 11 minutes or less and the standard deviation...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood cholesterol levels. The table shows the total blood cholesterol levels (in milligrams per deciliter of blood) of seven patients before eating the cereal and after one year of eating the cereal as part of their diets. Use technology to test the mean difference. Assume the samples are random and dependent, and the population is normally distributed. At a = 0.05, can you...
An insurance agent says the standard deviation of the total hospital charges for patients involved in a crash in which the vehicle struck a construction barricade is less than $3100. A random sample of 22 total hospital charges for patients involved in this type of crash has a standard deviation of $3500. At a = 0.01 can you support the agent's claim? Use the P-value method to test the claim. Identify the null and alternative hypotheses. Let o be the...
Hi all the answers are given on this worksheet I just need to
know how to do part (e) and calculate the two numbers in my TI-84.
(I use my TI-84 to get z and p-value)
Problem 4: Two Proportions In 1995, the American Cancer Society randomly sampled 1500 adults of which 555 smoked. In 2005, they surveyed 1730 adults and ound that 578 of them smoked. At the 5% level of significance test the claim that the proportion of...
A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood cholesterol levels. The table shows the total blood cholesterol levels (in milligrams per deciliter of blood) of seven patients before eating the cereal and after one year of eating the cereal as part of their diets. Use technology to test the mean difference. Assume the samples are random and dependent, and the population is normally distributed. At a 0.05, can you conclude...
8-6 (Testing a Claim about a Standard Deviation or Variance) 1) Which T1-83. or TI-84 automatic calculator function will you use in this section? a) 1-PropZTest b ) T-Test c) X-Test (d) None of these. 2) When a SRS of 40 people used 'Diet A' for one year, their weight losses had standard deviation 49 lbs. Use a 0.01 significance level to test the claim that the population standard deviation of all users of "Diet A' is 6.0, which is...
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