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3. [42.5 points] A world-renowned tech company is evaluating two programming languages. Ten data scientists, proficient...
3. [42.5 points] A large tech company is evaluating two programming languages. Twenty- four entry-level data...
3. [42.5 points] A large tech company is evaluating two programming languages. Twenty- four entry-level data scientists were asked to code a procedure. Twelve were randomly assigned to Programming Language 1, while the remaining twelve were assigned to Programming Language 2. Suppose you want to test whether the tech company should conclude Programming Language 1 is more inefficient. The following table shows the time required by each data scientist to code the procedure in seconds. Refer to Appendix A to...
A computer scientist is investigating the usefulness of two different design languages in improving programming tasks....
A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers, familiar with both languages, are asked to code a standard function in both languages, and the time in minutes) is recorded. The data follow: Time Design Language 1 Design Language 2 17 18 - 2 3 14 20 5 6 - - 16 21 13 18 24 16 14 21 23 13 18 - - 8 9 10 11 12 15...
5. (30 points) A food company is developing a new granola bar, and its market analysts...
5. (30 points) A food company is developing a new granola bar, and its market analysts are currently working on preliminary studies of the packaging design. To help with a marketing strategy, the company was first interested in whether the appeal of the packaging design for the new product (and hence the appeal of the product itself) was related to a person's gender. There were 100 male and 100 female volunteers available for purposes of evaluation. Both males and females...
2. [40 points) Consider the following pairs of observations: X 5 3 2 6 6 0...
2. [40 points) Consider the following pairs of observations: X 5 3 2 6 6 0 1 1 7 5 у 3 3 1 4 1 (a) (15 points] Use the method of least squares to fit a straight line to the seven data points in the table. (b) [5 pointsSpecify the null and alternative hypotheses you would use to test whether the data provide sufficient evidence to indicate that x contributes infor- mation for the (linear) prediction of y....
5. (30 points) A food company is developing a new granola bar, and its market analysts...
5. (30 points) A food company is developing a new granola bar, and its market analysts are currently working on preliminary studies of the packaging design. To help with a marketing strategy, the company was first interested in whether the appeal of the packaging design for the new product (and hence the appeal of the product itself) was related to a person's gender. There were 100 male and 100 female volunteers available for purposes of evaluation. Both males and females...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a mean strength of 9 kilograms and a variance of 0.5 kg' Assume we check the sample mean X1o of the breaking strength of 10 bags, and use X1o to determine whether a batch of bags comes from company 1 (null hypothesis Ho) or...
Super Sneaker Company is evaluating two different materials, A and B, to be used to construct...
Super Sneaker Company is evaluating two different materials, A and B, to be used to construct the soles of their new active shoe targeted to city high school students in Canada. While material B costs less than material A, the company suspects that mean wear for material B is greater than mean wear for material A. Two study designs were initially developed to test this suspicion. In both designs, Halifax was chosen as a repres ntativ city of the targeted...
Assignment 5 Answer the following questions based on the scenario described below. Points may be deducted...
Assignment 5 Answer the following questions based on the scenario described below. Points may be deducted if you do not clearly indicate all question numbers and answers or show all the steps in your analyses. A sports nutrition company develops a new energy gel meant to increase exercise endurance. You want to conduct a study to test this claim. You randomly assign a sample of n = 8 participants to two groups. You record the number of minutes n =...
QUESTION 1 (2 points. Full credit if 3 correct. Half credit if 1 correct.) la. Researchers...
QUESTION 1 (2 points. Full credit if 3 correct. Half credit if 1 correct.) la. Researchers at a California state environmental group want to test a plan to reduce car emissions in Los Angeles. They conduct an experiment with two groups of daily drivers: one group is given free vouchers for a newly renovated train line and a booklet on how best to use the transit system, and the other group is simply given the booklet. Every day, the rescarchers...
(10 points) A recent study of two vendors of desktop personal computers reported that out of...
(10 points) A recent study of two vendors of desktop personal computers reported that out of 858 units sold by Brand A, 118 required repair, while out of 775 units sold by Brand B, 119 required repair. Round all numeric answers to 4 decimal places. 1. Calculate the difference in the sample proportion for the two brands of computers, ParandA- PBrandB 2. What are the correct hypotheses for conducting a hypothesis test to determine whether the proportion of computers needing...
3. [42.5 points] A large tech company is evaluating two programming languages. Twenty- four entry-level data scientists were asked to code a procedure. Twelve were randomly assigned to Programming Language 1, while the remaining twelve were assigned to Programming Language 2. Suppose you want to test whether the tech company should conclude Programming Language 1 is more inefficient. The following table shows the time required by each data scientist to code the procedure in seconds. Refer to Appendix A to...
A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers, familiar with both languages, are asked to code a standard function in both languages, and the time in minutes) is recorded. The data follow: Time Design Language 1 Design Language 2 17 18 - 2 3 14 20 5 6 - - 16 21 13 18 24 16 14 21 23 13 18 - - 8 9 10 11 12 15...
5. (30 points) A food company is developing a new granola bar, and its market analysts are currently working on preliminary studies of the packaging design. To help with a marketing strategy, the company was first interested in whether the appeal of the packaging design for the new product (and hence the appeal of the product itself) was related to a person's gender. There were 100 male and 100 female volunteers available for purposes of evaluation. Both males and females...
2. [40 points) Consider the following pairs of observations: X 5 3 2 6 6 0 1 1 7 5 у 3 3 1 4 1 (a) (15 points] Use the method of least squares to fit a straight line to the seven data points in the table. (b) [5 pointsSpecify the null and alternative hypotheses you would use to test whether the data provide sufficient evidence to indicate that x contributes infor- mation for the (linear) prediction of y....
5. (30 points) A food company is developing a new granola bar, and its market analysts are currently working on preliminary studies of the packaging design. To help with a marketing strategy, the company was first interested in whether the appeal of the packaging design for the new product (and hence the appeal of the product itself) was related to a person's gender. There were 100 male and 100 female volunteers available for purposes of evaluation. Both males and females...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a mean strength of 9 kilograms and a variance of 0.5 kg' Assume we check the sample mean X1o of the breaking strength of 10 bags, and use X1o to determine whether a batch of bags comes from company 1 (null hypothesis Ho) or...
Super Sneaker Company is evaluating two different materials, A and B, to be used to construct the soles of their new active shoe targeted to city high school students in Canada. While material B costs less than material A, the company suspects that mean wear for material B is greater than mean wear for material A. Two study designs were initially developed to test this suspicion. In both designs, Halifax was chosen as a repres ntativ city of the targeted...
Assignment 5 Answer the following questions based on the scenario described below. Points may be deducted if you do not clearly indicate all question numbers and answers or show all the steps in your analyses. A sports nutrition company develops a new energy gel meant to increase exercise endurance. You want to conduct a study to test this claim. You randomly assign a sample of n = 8 participants to two groups. You record the number of minutes n =...
QUESTION 1 (2 points. Full credit if 3 correct. Half credit if 1 correct.) la. Researchers at a California state environmental group want to test a plan to reduce car emissions in Los Angeles. They conduct an experiment with two groups of daily drivers: one group is given free vouchers for a newly renovated train line and a booklet on how best to use the transit system, and the other group is simply given the booklet. Every day, the rescarchers...
(10 points) A recent study of two vendors of desktop personal computers reported that out of 858 units sold by Brand A, 118 required repair, while out of 775 units sold by Brand B, 119 required repair. Round all numeric answers to 4 decimal places. 1. Calculate the difference in the sample proportion for the two brands of computers, ParandA- PBrandB 2. What are the correct hypotheses for conducting a hypothesis test to determine whether the proportion of computers needing...
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