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3. A local authority suspects that the amount per container is less than 16 oz (as...
A production line operates with a mean filling weight of 16 grams per container and is...
A production line operates with a mean filling weight of 16 grams per container and is known to have a standard deviation of 0.8 gram. A quality control inspector samples 30 items to determine whether or not the filling weight has to be adjusted. The sample mean was found to be 16.32 grams. The value of the test statistic is Select one: a. -1.645 b. 0.4 c. 12 d. 2.19 e. 1.645
A manufacturer makes ball bearings that are supposed to weigh 30 g. A retailer suspects the...
A manufacturer makes ball bearings that are supposed to weigh 30 g. A retailer suspects the mean weight is less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.4 g with a standard deviation of 4.2 g. At the 0.05 significance level, test the claim that the mean weight of all the ball bearings is less than 30 g. Assume population is normally distributed. Choose an answer for each question. (20 points total)...
A certain vehicle emission inspection station advertises that the wait time for customers is less than 9 minutes
A certain vehicle emission inspection station advertises that the wait time for customers is less than 9 minutes. A local resident wants to test this claim and collects a random sample of 64 wat times for customers at the testing station. She finds that the sample mean is 7.52 minutes, with a standard deviation of 3.4 minutes. Does the sample evidence support the inspection station's claim? Use the α=0.01 level of significance to lest the advertised claim that the wait...
Acertain vehide emission inspection station advertises that the wall time for customers is less than 9...
Acertain vehide emission inspection station advertises that the wall time for customers is less than 9 minutes. A local resident wants to test this claim and collects a random sample of 49 wait times for customers at the testing Station He finds that the sample mean is 8.42 minutes, with a standard deviation of 3.8 minutes. Does the sample evidence support the inspection station's claim? Use the a 0.05 level of significance to test the advertised claim that the wall...
A local hardware store claims that the mean waiting time in line is less than 3.5...
A local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.3 minutes with a standard deviation of 0.8 minute. If a = 0.05, test the store's claim. Assumption: ? Parameter: ? Hypothesis: ? Test Statistic: ? Reject- Region: ? Calculated Test Statistic: ? Conclusion: ? P-value: ?
A) The production supervisor of an assembly line for producing potato chips suspects that the weight of bags of potato c...
A) The production supervisor of an assembly line for producing potato chips suspects that the weight of bags of potato chips produced is higher than the specification of 250 mg. She would like to take a simple random sample of bags of potato chips produced by the assembly line and perform a statistic test to confirm that this is indeed the case. (6 points) What would be the null and alternative hypothesis for this research? What is the type I...
Question 16 0.2 pts The average SAT in the state is reported to be 1010. A...
Question 16 0.2 pts The average SAT in the state is reported to be 1010. A school administrator wants to know if the mean for the local district is the same or different from 1010 so the administrator takes a random sample of scores from the records of students in the district. State the null (H) and alternative (H ) hypothesis to test this claim. Ημ + 1010 Ημ 1010 над 1010 H 1010 Hau > 1010 H < 1010...
A local politician running for reelection claims the mean prison time for car thieves is less...
A local politician running for reelection claims the mean prison time for car thieves is less than the required 6 yrs. A sample of 80 convicted car thieves was randomly selected and the mean length of prison time was found to be 5.5 yrs. with a standard deviation of 1.25 yrs. alpha=0.05 State the claim mathematically. Is the claim the null or alternative hypothesis? State your hypotheses. Determine the test of significance (t-test or z-test) and justify your choice. State...
In a random sample of 40 ed este tax returns w amount of lowed for state...
In a random sample of 40 ed este tax returns w amount of lowed for state taxes. i ned that the mean amount of a n exced was $456 with a Mandard deviation of 52523. Construct and Werpreta 20% confidence interval for the men tional Click the loon to view the distribution table The lower bound Round to the nearest doar as needed) The upper bound is found to the dollar as needed) Interpreta 90% confidence interval for the mean...
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic....
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug...
Acertain vehide emission inspection station advertises that the wall time for customers is less than 9 minutes. A local resident wants to test this claim and collects a random sample of 49 wait times for customers at the testing Station He finds that the sample mean is 8.42 minutes, with a standard deviation of 3.8 minutes. Does the sample evidence support the inspection station's claim? Use the a 0.05 level of significance to test the advertised claim that the wall...
A local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.3 minutes with a standard deviation of 0.8 minute. If a = 0.05, test the store's claim. Assumption: ? Parameter: ? Hypothesis: ? Test Statistic: ? Reject- Region: ? Calculated Test Statistic: ? Conclusion: ? P-value: ?
Question 16 0.2 pts The average SAT in the state is reported to be 1010. A school administrator wants to know if the mean for the local district is the same or different from 1010 so the administrator takes a random sample of scores from the records of students in the district. State the null (H) and alternative (H ) hypothesis to test this claim. Ημ + 1010 Ημ 1010 над 1010 H 1010 Hau > 1010 H < 1010...
In a random sample of 40 ed este tax returns w amount of lowed for state taxes. i ned that the mean amount of a n exced was $456 with a Mandard deviation of 52523. Construct and Werpreta 20% confidence interval for the men tional Click the loon to view the distribution table The lower bound Round to the nearest doar as needed) The upper bound is found to the dollar as needed) Interpreta 90% confidence interval for the mean...
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug...
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