You do not have to use the =t.dist on excel for this question if not desired,...
You do not have to use the =t.dist on excel for this question if not desired,
A random sample of 26 observations is used to estimate the population mean. The sample mean and the sample standard deviation are calculated as 215 and 78, respectively. Assume that the population is normally distributed.
- Use the critical value approach to test if the population mean is less than 250 at α=0.05.
- Use Excel function =t.dist to find the p-value for part a and use the p-value approach to test if the population mean is less than 250 at α=0.05.
- Use the critical value approach to test if the population mean is different from 250 at α=0.05.
- Use Excel function =t.dist.2t to find the p-value for part c and use the p-value approach to test if the population mean is different from 250 at α=0.05.
Homework Answers
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You do not have to use the =t.dist on excel for this question if
not desired,...
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...
how do we find h0 and h1 2016 Questions 1 and 2 are based on the...
how do we find h0 and h1
2016 Questions 1 and 2 are based on the study described below MQ Marketing Services researched mobile technology usage among students in both 2014 and 2015. A study was undertaken in which random samples of Macquarie University students were Invited to take part in a project regarding their smartphone usage. 27 students from 2014 and 29 students from 2015 particlpated in this study. The output below was constructed using the times these students...
Please provide excel Formulas. thank you Scenario 2: A study is performed in a small southern...
Please provide excel Formulas. thank you
Scenario 2: A study is performed in a small southern town to determine whether the average weekly grocey bill for a four-person family is significantly less than national average of $185. A simple random sample of 19 weekly grocery bills for four-person families is selected from the town. The data is shown to the right. They suspect from the sample data that the small town's average grocery bill is less than the national average....
Please help with solving this population mean problem. Note: The function STDEV is used for Excel...
Please help with solving this population mean problem.
Note: The function STDEV is used for Excel versions 2007 and earlier. For later versions, STDEV was replaced by STDEV.S. However, STDEV can still be used in later versions of Excel. Similarly, TDIST and NORM SDIST were replaced by T.DIST and NORM.S.DIST. 1 AB Vertical Error, x Hypothesis Test about a Population Mean: 0.0101 o Unknown Case 0.0003 0.0029 Sample Size -0.0186 Sample Mean 0.001 Sample Standard Deviation 0.0072 Hypothesized Value -0.0026...
Please provide the correct answers for the ones marked with a RED X near them Individuals...
Please provide the correct answers for the ones marked with a
RED X near them
Individuals filing federal income tax returns prior to March 31 received an average refund of $1,072. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15) a. A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower...
The first picture contains the whole thing. I went ahead and took additional pictures of each...
The first picture contains the whole thing. I went ahead and
took additional pictures of each of a, b, c, and d by themselves.
For c and d there’s multiple drop downs so please choose the
correct answer for each of them. THANK YOU IN ADVANCE!!!
Consider the following hypothesis test: A sample of 40 provided a sample mean of 14.18. The population standard deviation is 5. Enter negative value as negative number a. Compute the value of the test...
1. The production supervisor of an assembly line for producing cheeses suspects that the weight of the bags prod...
1. The production supervisor of an assembly line for producing cheeses suspects that the weight of the bags produced is higher than the specification of 200 g She would like to take a simple random sample of bags of cheeses produced by the assembly line and perform a statistic test to confirm that this is indeed the case. (6 points) a. What would be the null and alternative hypothesis for this research? b. What is the type I error in...
The σ population standard deviation is unknown. You collected a simple random sample of the cents...
The σ population standard deviation is unknown. You collected a simple random sample of the cents portions from 100 checks and from 100 credit card charges. The cents portions of the checks have a mean of 23.8 cents and a standard deviation of 32.0 cents. The cents portions of the credit charges have a mean of 47.6 cents and a standard deviation of 33.5 cents. Use an α = 0.05 level to test the claim that the cents portions of...
Consider the following hypotheses: H0: μ = 19 HA: μ ≠ 19 The population is normally...
Consider the following hypotheses: H0: μ = 19 HA: μ ≠ 19 The population is normally distributed. A sample produces the following observations: (You may find it useful to reference the appropriate table: z table or t table) 20 23 17 21 21 24 23 Click here for the Excel Data File a. Find the mean and the standard deviation. (Round your answers to 2 decimal places.) b. Calculate the value of the test statistic. (Round intermediate calculations to...
Exercise 9-39 Algo Consider the following hypotheses: H0: μ = 20 HA: μ ≠ 20 The...
Exercise 9-39 Algo Consider the following hypotheses: H0: μ = 20 HA: μ ≠ 20 The population is normally distributed. A sample produces the following observations: (You may find it useful to reference the appropriate table: z table or t table) 24 20 24 21 21 24 19 Click here for the Excel Data File a. Find the mean and the standard deviation. (Round your answers to 2 decimal places.) b. Calculate the value of the test statistic. (Round...
how do we find h0 and h1
2016 Questions 1 and 2 are based on the study described below MQ Marketing Services researched mobile technology usage among students in both 2014 and 2015. A study was undertaken in which random samples of Macquarie University students were Invited to take part in a project regarding their smartphone usage. 27 students from 2014 and 29 students from 2015 particlpated in this study. The output below was constructed using the times these students...
Please provide excel Formulas. thank you
Scenario 2: A study is performed in a small southern town to determine whether the average weekly grocey bill for a four-person family is significantly less than national average of $185. A simple random sample of 19 weekly grocery bills for four-person families is selected from the town. The data is shown to the right. They suspect from the sample data that the small town's average grocery bill is less than the national average....
Please help with solving this population mean problem.
Note: The function STDEV is used for Excel versions 2007 and earlier. For later versions, STDEV was replaced by STDEV.S. However, STDEV can still be used in later versions of Excel. Similarly, TDIST and NORM SDIST were replaced by T.DIST and NORM.S.DIST. 1 AB Vertical Error, x Hypothesis Test about a Population Mean: 0.0101 o Unknown Case 0.0003 0.0029 Sample Size -0.0186 Sample Mean 0.001 Sample Standard Deviation 0.0072 Hypothesized Value -0.0026...
Please provide the correct answers for the ones marked with a
RED X near them
Individuals filing federal income tax returns prior to March 31 received an average refund of $1,072. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15) a. A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower...
The first picture contains the whole thing. I went ahead and
took additional pictures of each of a, b, c, and d by themselves.
For c and d there’s multiple drop downs so please choose the
correct answer for each of them. THANK YOU IN ADVANCE!!!
Consider the following hypothesis test: A sample of 40 provided a sample mean of 14.18. The population standard deviation is 5. Enter negative value as negative number a. Compute the value of the test...
1. The production supervisor of an assembly line for producing cheeses suspects that the weight of the bags produced is higher than the specification of 200 g She would like to take a simple random sample of bags of cheeses produced by the assembly line and perform a statistic test to confirm that this is indeed the case. (6 points) a. What would be the null and alternative hypothesis for this research? b. What is the type I error in...
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