A hospital administrator believes that the standard deviation of the numbers of people using outpatient surgery...
- A hospital administrator believes that the standard deviation of the numbers of people using outpatient surgery per day is greater than 8. A random sample of 16 days is selected and the standard deviation is 11.2. At Alpha = 0.10 , is there enough evidence to support the administrator’s claim? Assume the variable is normally distributed.
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A hospital administrator believes that the standard deviation
of the numbers of people using outpatient surgery...
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 $3900. A random sample of 28 total hospital charges for patients involved in this type of crash has a standard deviation of $4700. At α=0.10 can you support the agent's claim? Use the P-value method to test the claim.Identify the null and alternative hypotheses. Let σ be the population standard deviation....
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
This case study is about a study on coffee consumption of people that live in the...
This case study is about a study on coffee consumption of people that live in the United States. In total, 92 people were randomly selected and data was gathered regarding the annual consumption of coffee in gallons. Of these 92, 51 were females and 41 were males. You must show all work and formulas used in order to receive full credit. This includes showing all steps of the appropriate hypothesis test from the chapter notes. Round decimals in calculations to...
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...
A researcher found that a cigarette smoker smokes on average 31 cigarettes a day. She feels...
A researcher found that a cigarette smoker smokes on average 31 cigarettes a day. She feels that this average is too high. She selected a random sample of 15 smokers and found that mean number of cigarettes they smoked per day was 28. The sample standard deviation was 2.4. At Alpha αequals 0.05 is there enough evidence to support her claim?Assume that the population is approximately normally distributed.
Questions 2 and 3 refer to the following information regarding the annual consumption of coffee of...
Questions 2 and 3 refer to the following information regarding the annual consumption of coffee of the 41 males. Of the sample of the 41 males, the sample mean is 25.7 gallons and the sample standard deviation is 3.8 gallons. Assume the data is normally distributed and the sample is randomly selected. 2. Assuming α = 0.005, is there enough evidence to support a claim that the mean amount of consumption is at least 28 gallons? (12 points) 3. Assuming...
SELECT ALL APPLICABLE CHOIC B) There is NOT enough evidence to reject the Ho Hį: 0=3.5...
SELECT ALL APPLICABLE CHOIC B) There is NOT enough evidence to reject the Ho Hį: 0=3.5 (claim) H: 0 #3.5 Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select four correct choices. A manufacturer uses a new production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standard deviation of 2.1...
Case Study Chapter 7 Elementary Statistics This case study is about a study on coffee consumption...
Case Study Chapter 7 Elementary Statistics This case study is about a study on coffee consumption of people that live in the United States. In total, 92 people were randomly selected and data was gathered regarding the annual consumption of coffee in gallons. Of these 92, 51 were females and 41 were males. You must show all work and formulas used in order to receive full credit. This includes showing all steps of the appropriate hypothesis test from the chapter...
17 and 18 please. Thank you. gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
1. Sample Mean: mens- 27.91 women - 31.57 2. Standard Deviation men- 0.664 women- 1.167 Sample...
1. Sample Mean: mens- 27.91 women - 31.57 2. Standard Deviation men- 0.664 women- 1.167 Sample Size mens- 32 womens- 35 Using the values that you found in numbers 1 and 2, perform the following hypothesis test. At a 10% significance level, test the claim that the women’s mean completion time is greater than ___________ (the men’s mean completion time). Ho: _________________ Ha: __________________ Label the claim. What type of test will you use? (Z-Test, T-test, or 1-ProZTest) ____________________ Where...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
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...
SELECT ALL APPLICABLE CHOIC B) There is NOT enough evidence to reject the Ho Hį: 0=3.5 (claim) H: 0 #3.5 Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select four correct choices. A manufacturer uses a new production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standard deviation of 2.1...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
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