2. What is the standard error of M?
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Standard error of M.
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- 2) Millman’s golfing group is terrific for a group of amateurs. Are they ready to turn pro? (Remember a lower score in golf is better!) Size Average score SD Millman's Group 9 82 2.6 The Pros 500 71 3.1What is the meaning (eq) of the formula L in the question (f)?The Central Limit Theorem says that the standard deviation of the sampling distribution of the sample means is (A exactly equal to the standard deviation. (B close to the population mean if the sample size is small close to the population standard deviation if the sample size is large. equal to the population standard deviation divided by the square root of the sample D size.
- O Briefly decribe the difference be tween estimations and hygorhesis testing. (2)1. In the past, a chemical company produced 880 pounds of a certain type of plastic per day. Now, using a newly developed and less expensive process, the mean daily yield of plastic for the first 50 days of production is 871 pounds; the standard deviation is 21 pounds. Do the data provide sufficient evidence to indicate that the mean daily yield for the new process is less than that of the old procedure? (Use a=0.05) (d) Conclusion of the test above is Reject the null hypothesis and the mean daily yield for the new process is less than that of the old procedure. Do not reject the null hypothesis and the mean daily yield for the new process is not less than that of the old procedure. Reject the null hypothesis and the mean daily yield for the new process is not less than that of the old procedure O #3 99+ M 1941 9 O (?) + [ Rain... = 41. insert E b pAn auto rental firm is using identical motors that are adjusted to run at a fixed speed to test different brands of gasoline. Each brand of gasoline is assigned to exactly of the motors. Each motor runs on gallons of gasoline until it is out of fuel.The following represents the total mileages obtained by the different motors:Gas 1: 220 251 226 246 260Gas 2: 244 235 232 242 225Gas 3: 252 272 250 238 256a) Calculate the sum of squared deviation within and between each of type of gasoline used, for their mileages obtained. b) Estimate the degrees of freedom within and between mileage at each type of gasoline used. c) Test the hypothesis that the average mileage obtained is not affected by the type of gas used. Use the level of significance.
- A fast food restaurant boasts that their mean wait time in the drive-thru line is less than 3 minutes. Does the restaurant's claim hold true if the average wait time for 125 drive-thru customers is 2.82 minutes? (Assume σ = 1.16.)State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a) t= 1.584 (b) t=0 (c) t= - 1.526 (d) t= - 1.604 to = - 1.558 (a) For t= 1.584, should you reject or fail to reject the null hypothesis? O A. Fail to reject Ho, because t> - 1.558. O B. Reject Ho, because t> - 1.558. O C. Reject Ho, because t - 1.558. O B. Fail to reject Ho, because t - 1.558. (c) For t= - 1.526, should you reject or fail to reject the null hypothesis? O A. Reject Ho, because t - 1.558. O C. Fail to reject Ho, because t> - 1.558. O D. Fail to reject Hn, because t< - 1.558.K Before every flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The aircraft can carry 41 passengers, and a flight has fuel and baggage that allows for a total passenger load of 6,765 lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than 6,765 lb 41 Should the pilot take any action to correct for an overloaded aircraft? Assume that weights of men are normally distributed with a mean of 183.6 lb and a standard deviation of 35.4. The probability is approximately (Round to four decimal places as needed.) ONCORPURINE MIMPIETARTUST SAMPARADE HOMENOT MANCHEIDU WARMTPARASH PRES = 165 lb. What is the probability that the aircraft is overloaded?