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A company makes bolts for construction companies. The bolts are supposed...
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value...
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
need the answer can simplify the process. It has been reported that among those who file...
need the answer can simplify the process.
It has been reported that among those who file their income tax return, the mean amount of tax refund is $1056, with a standard deviation of s = $1400. A study was done to determine whether people who file their tax return during the last 5 days before the deadline get a smaller refund, on average, than that of the entire population. A random sample of 64 "last minute" filers was taken and...
The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches...
The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches per box, with ?? = 9. A random sample of 94 Nero matchboxes shows the average number of matched per box to be 43.1. Using a 5% level of significance, can you say that the average number of matches per box is more than 40? a) what is the level of significance? state the null and alternate hypothesis b) what sampling distribution will you...
A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The...
A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The bolts should be 0.210.21 centimeters in diameter. The variance of the bolts should be 0.0250.025. A random sample of 2525 bolts has an average diameter of 0.2cm0.2cm with a standard deviation of 0.05450.0545. Can the manufacturer conclude that the bolts vary from the required variance at α=0.05α=0.05 level? Step 1 of 5: State the hypotheses in terms of the standard deviation. Round the standard...
answer please An information technologist used a program called ping to measure the time (in milliseconds)...
answer please
An information technologist used a program called ping to measure the time (in milliseconds) taken to contact and receive a reply from another computer on the Internet. You wish to perform the following test about the population standard deviation, Ho: 0 = 300 vs. HA: 0 < 300. A random sample of 30 connection times gave a sample standard deviation of s = 225.5. Assume that the population of connection times is normally distributed. If you test this...
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations....
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations. Sample 1 F1 = 22.49 11 = 2.54 P1 = 15 Sample 2 F2 = 27.31 3 = 3.08 P2 = 18 Test the null hypothesis HO : H1 = 2 against the alternative hypothesis HA: MI <H2 a) To save you on calculations, I will tell you that the standard error of the difference in sample means (SE(X_1 bar - X_2 bar)) is...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine that makes...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not produce each rod exactly 36 inches long. The lengths of these rods vary slightly. It is known that when the machine is working properly, the mean length of the rods is 36 inches. According to design, the standard deviation of the lengths of all rods produced on this machine is always equal to .05 inches. The quality control...
Please answer both questions D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus...
Please answer both questions
D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus 24/7 Pr A health insurer suspects that the average fee charged by one particular clinic for a medical procedure is higher than $1200. The insurer wants to perform a hypothesis test to determine whether their suspicion is correct. The hypotheses are: Hops $1200 H:p> $1200 Suppose that the test will be conducted at a 5% significance level, and the insurer plans to randomly sample...
Help me answer this 4- It has been reported that tech companies in Silicon Valley hired...
Help me answer this
4- It has been reported that tech companies in Silicon Valley hired an average of 18.7 new employees last year. Suppose you take a random sample of 15 of the companies this year and find that the average number of new hires in the sample is 19.5. The sample standard deviation is 3.6. Is the sample evidence sufficient to reject the null hypothesis Ho: μ-18.7 ? Use a significance level of.05. Assume the population distribution is...
Please answer all D Question 27 1 pts A politician claims that for the adult population...
Please answer all
D Question 27 1 pts A politician claims that for the adult population of one town, the mean annual salary is u-$30,000 Sample data is collected: n-47, - $22,298, and s-$14,200. Use a significance level of a -0.10 to state the correct rejection region for a test of the claim. Time Attem 1 Ho eus 24/7 Reject Hoifz > 1.96 or z < -1.96. 5 Reject Hoitz < -2.576. Reject Ho if z > 1.96 Reject Ho...
Question 22 3 pts Suppose you are interested in testing a null hypothesis and the p-value associated with the test statistic is 0.004. As a result, you should o reject the null hypothesis at the 5-percent level of significance, but not at the 1- percent level of significance. do not reject the null hypothesis at the 5-percent level of significance, but do reject the null at the 1-percent level of significance. o do not reject the null hypothesis at the...
need the answer can simplify the process.
It has been reported that among those who file their income tax return, the mean amount of tax refund is $1056, with a standard deviation of s = $1400. A study was done to determine whether people who file their tax return during the last 5 days before the deadline get a smaller refund, on average, than that of the entire population. A random sample of 64 "last minute" filers was taken and...
answer please
An information technologist used a program called ping to measure the time (in milliseconds) taken to contact and receive a reply from another computer on the Internet. You wish to perform the following test about the population standard deviation, Ho: 0 = 300 vs. HA: 0 < 300. A random sample of 30 connection times gave a sample standard deviation of s = 225.5. Assume that the population of connection times is normally distributed. If you test this...
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations. Sample 1 F1 = 22.49 11 = 2.54 P1 = 15 Sample 2 F2 = 27.31 3 = 3.08 P2 = 18 Test the null hypothesis HO : H1 = 2 against the alternative hypothesis HA: MI <H2 a) To save you on calculations, I will tell you that the standard error of the difference in sample means (SE(X_1 bar - X_2 bar)) is...
Please answer both questions
D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus 24/7 Pr A health insurer suspects that the average fee charged by one particular clinic for a medical procedure is higher than $1200. The insurer wants to perform a hypothesis test to determine whether their suspicion is correct. The hypotheses are: Hops $1200 H:p> $1200 Suppose that the test will be conducted at a 5% significance level, and the insurer plans to randomly sample...
Help me answer this
4- It has been reported that tech companies in Silicon Valley hired an average of 18.7 new employees last year. Suppose you take a random sample of 15 of the companies this year and find that the average number of new hires in the sample is 19.5. The sample standard deviation is 3.6. Is the sample evidence sufficient to reject the null hypothesis Ho: μ-18.7 ? Use a significance level of.05. Assume the population distribution is...
Please answer all
D Question 27 1 pts A politician claims that for the adult population of one town, the mean annual salary is u-$30,000 Sample data is collected: n-47, - $22,298, and s-$14,200. Use a significance level of a -0.10 to state the correct rejection region for a test of the claim. Time Attem 1 Ho eus 24/7 Reject Hoifz > 1.96 or z < -1.96. 5 Reject Hoitz < -2.576. Reject Ho if z > 1.96 Reject Ho...
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