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3. Hockey st yields the following results (in Newtone) 490.1 4921 491.7 517.2 07.3 Mean 474.02...
I also NEED the test statistic and p-value if possible please! Thank you! Hockey sticks: The...
I also NEED the test statistic and p-value if possible please!
Thank you!
Hockey sticks: The breaking strength of hockey stick shafts made of two different graphite-kevlar composites yields the following results (in Newtons). Composite 1: 550.6 507.8 534.7 518.7 516.2 528.5 546.6 549.7 573.4 Composite 2: 580.7 569.2 543.5 543 529.4 564.7 531.1 525.8 526.5 528.3 553.4 543.3 568 Sand data to Excel Can you conclude that the standard deviation of the breaking strength Composite 1 is greater? Use...
2. The following table presents the numbers of emplovees, by age group, who were promoted, or...
2. The following table presents the numbers of emplovees, by age group, who were promoted, or not promoted, in a sample drawn from a certain industry during the past ycar. Age 40-49 50 and Over 3039 Under 30 8 29 24 19 Promoted 42 47 49 34 Not Promoted Can you conclude that the people in some age groups are more likely to be promoted than those in other age groups? Use the a 0.01 level of significance. (a) State...
When bonding teeth, orthodontists must maintain a dry field. A new bonding adhesive (called "Smartbond") has...
When bonding teeth, orthodontists must maintain a dry field. A new bonding adhesive (called "Smartbond") has been developed to eliminate the necessity of a dry field. However, there is concern that the new bonding adhesive is not as strong as the current standard, a composite adhesive. Tests on a sample of 10 extracted teeth bonded with the new adhesive resulted in a mean breaking strength (after 24 hours) of x-5.07 Mpa and a standard deviation of s .46 Mpa where...
(20 pts)3. A teacher claims that the mean score on a statistics test is 81 points....
(20 pts)3. A teacher claims that the mean score on a statistics test is 81 points. A random sample of 64 test scores yields a mean score of 79 points and a standard deviation of 10 points. Use a significance level of 0.05. a. State the null and alternative hypotheses. b. Construct a statistic to test the hypotheses and select the distribution to use. c. Find the P-value, and determine the level of significance. d. Make the decision and interpret.
Consider the following hypotheses: Hot 208 RAM 208 A sample of 74 observations results in a...
Consider the following hypotheses: Hot 208 RAM 208 A sample of 74 observations results in a sample mean of 202. The population standard deviation is known to be 26. (You may find it useful to reference the appropriate table: z table or table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2. Find...
Consider the following hypotheses: HO: > 220 HA: U <220 A sample of 72 observations results...
Consider the following hypotheses: HO: > 220 HA: U <220 A sample of 72 observations results in a sample mean of 209. The population standard deviation is known to be 18. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test...
A teacher claims that the mean score on a statistics test is 81 points. A random...
A teacher claims that the mean score on a statistics test is 81 points. A random sample of 64 test scores yields a mean score of 79 points and a standard deviation of 10 points. Use a significance level of 0.05. a. State the null and alternative hypotheses. b. Construct a statistic to test the hypotheses and select the distribution to use. c. Find the P-value, and determine the level of significance. d. Make the decision and interpret
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a...
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a sample mean of 63.3. Assume that the sample is drawn from a normal population with a population standard deviation of 5.1. (You may find it useful to reference the appropriate table: z table or table) a-1. Find the p-value. O p-value 20.10 O p-value < 0.01 O 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value < 0.10 a-2. What...
2) The Jack Wilson Health Club claims in advertisements that "you will lose weight after only...
2) The Jack Wilson Health Club claims in advertisements that "you will lose weight after only two days of the Jack Wilson diet and exercise program." The Dade County Bureau of Consumer Affairs conducts a test of that claim by randomly selecting 50 people who have signed up for the G) program. It was found that the 50 people lost an average ( of 0.52 lb., with a standard 0.01 to test the advertised claim deviation of 0.75 lb. Use...
Problems 3-7, a. State the hypotheses. b. Select an appropriate test and calculate the test statistic....
Problems 3-7, a. State the hypotheses. b. Select an appropriate test and calculate the test statistic. c. Find the critical value(s) and rejection region. d. Find the p-value. Write the conclusion in terms of the claim using both the rejection region and p- value methods. e. 3. The average undergraduate cost for tuition, fees, and room and board for two-year institutions last year was $13,252. The following year, a random sample of 20 two- year institutions had a mean of...
I also NEED the test statistic and p-value if possible please!
Thank you!
Hockey sticks: The breaking strength of hockey stick shafts made of two different graphite-kevlar composites yields the following results (in Newtons). Composite 1: 550.6 507.8 534.7 518.7 516.2 528.5 546.6 549.7 573.4 Composite 2: 580.7 569.2 543.5 543 529.4 564.7 531.1 525.8 526.5 528.3 553.4 543.3 568 Sand data to Excel Can you conclude that the standard deviation of the breaking strength Composite 1 is greater? Use...
2. The following table presents the numbers of emplovees, by age group, who were promoted, or not promoted, in a sample drawn from a certain industry during the past ycar. Age 40-49 50 and Over 3039 Under 30 8 29 24 19 Promoted 42 47 49 34 Not Promoted Can you conclude that the people in some age groups are more likely to be promoted than those in other age groups? Use the a 0.01 level of significance. (a) State...
When bonding teeth, orthodontists must maintain a dry field. A new bonding adhesive (called "Smartbond") has been developed to eliminate the necessity of a dry field. However, there is concern that the new bonding adhesive is not as strong as the current standard, a composite adhesive. Tests on a sample of 10 extracted teeth bonded with the new adhesive resulted in a mean breaking strength (after 24 hours) of x-5.07 Mpa and a standard deviation of s .46 Mpa where...
(20 pts)3. A teacher claims that the mean score on a statistics test is 81 points. A random sample of 64 test scores yields a mean score of 79 points and a standard deviation of 10 points. Use a significance level of 0.05. a. State the null and alternative hypotheses. b. Construct a statistic to test the hypotheses and select the distribution to use. c. Find the P-value, and determine the level of significance. d. Make the decision and interpret.
Consider the following hypotheses: Hot 208 RAM 208 A sample of 74 observations results in a sample mean of 202. The population standard deviation is known to be 26. (You may find it useful to reference the appropriate table: z table or table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2. Find...
Consider the following hypotheses: HO: > 220 HA: U <220 A sample of 72 observations results in a sample mean of 209. The population standard deviation is known to be 18. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test...
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a sample mean of 63.3. Assume that the sample is drawn from a normal population with a population standard deviation of 5.1. (You may find it useful to reference the appropriate table: z table or table) a-1. Find the p-value. O p-value 20.10 O p-value < 0.01 O 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value < 0.10 a-2. What...
2) The Jack Wilson Health Club claims in advertisements that "you will lose weight after only two days of the Jack Wilson diet and exercise program." The Dade County Bureau of Consumer Affairs conducts a test of that claim by randomly selecting 50 people who have signed up for the G) program. It was found that the 50 people lost an average ( of 0.52 lb., with a standard 0.01 to test the advertised claim deviation of 0.75 lb. Use...
Problems 3-7, a. State the hypotheses. b. Select an appropriate test and calculate the test statistic. c. Find the critical value(s) and rejection region. d. Find the p-value. Write the conclusion in terms of the claim using both the rejection region and p- value methods. e. 3. The average undergraduate cost for tuition, fees, and room and board for two-year institutions last year was $13,252. The following year, a random sample of 20 two- year institutions had a mean of...
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