The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the...
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the number of customers served was 125, 110, 220, 280, 130, and 240. She believes that the number of customers served on weekdays follows a normal distribution. Construct the 99% confidence interval for the average number of customers served on weekdays. (You may find it useful to reference the t table. Round intermediate calculations to at least 4 decimal places, "sample mean" and "sample standard deviation" to 2 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.)
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The manager of The Cheesecake Factory in Boston reports that on
six randomly selected weekdays, the...
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the...
The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the number of customers served was 175, 125, 180, 220, 240, and 245. She believes that the number of customers served on weekdays follows a normal distribution. Construct the 99% confidence interval for the average number of customers served on weekdays. Use Table 2. (Round intermediate calculations to 4 decimal places, "sample mean" and "sample standard deviation" to 2 decimal places. Round "t" value to...
The manager of The Eastside Brewery in Chicago reports that on six randomly selected weekdays, the...
The manager of The Eastside Brewery in Chicago reports that on six randomly selected weekdays, the number of customers served was as follows: 120 130 1100 205 185 220 She believes that the number of customers served on weekdays follows a normal distribution. a. Construct the 95% confidence interval for the average number of customers served on weekdays. (Round answers to 2 decimal places.) Confidence interval to b. How can the margin of error reported in part a be reduced?...
A small hair salon in Denver, Colorado, averages about 30 customers on weekdays with a standard...
A small hair salon in Denver, Colorado, averages about 30 customers on weekdays with a standard deviation of 6. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $2 discount on 5 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 5 weekday period jumps to 35. Use Table 1. a. What is the probability to...
A small hair salon in Denver, Colorado, averages about 62 customers on weekdays with a standard...
A small hair salon in Denver, Colorado, averages about 62 customers on weekdays with a standard deviation of 16. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $3 discount on 9 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 9 weekday period jumps to 74. Use Table 1. a. What is the probability to...
Ch 7 # 5: Please help answer the probability for a-e: A small hair salon in...
Ch 7 # 5: Please help answer the probability for a-e: A small hair salon in Denver, Colorado, averages about 60 customers on weekdays with a standard deviation of 15. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $4 discount on 7 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 7 weekday period jumps...
In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samp
1. In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samples) is provided. a). Would it be appropriate to use the normal distribution to construct the confidence interval in this situation? Explain briefly. b). The standard error from the bootstrap distribution is SE = 0.016. Use the normal distribution...
A. According to a 2009 Reader's Digest article, people throw away about 10% of what they...
A. According to a 2009 Reader's Digest article, people throw away about 10% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 192 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.18? Note: You should keep at least 4 decimal places for any intermediate calculations you make to match wamap's approach and calculations. Answer = (Enter your answer as a number...
randomly selected people took an 1Q test A, and next day they took a very similar...
randomly selected people took an 1Q test A, and next day they took a very similar 1Q test B. Their scores are shown in the table beiow A BCDE FGHI Test A 117 108 93 89 128 98 76104 108 83 Test B 122 109 93 91 12799 76108 107 82 1. Consider (Test A- Test B). Use a 0.01 decimal places level to test the claim that people do bettar on the sacond test than they do on the...
19 25 The sample of six measurements shown below was randomly selected from a normally distributed...
19 25 The sample of six measurements shown below was randomly selected from a normally distributed population. Complete parts a through c. 1,2,3,3,4,1 a. Test the null hypothesis that the mean of the population is 3 against the alternative hypothesis. p < 3. Use a = 0.05 Ifq=0.05, find the rejection region for the test. Choose the correct answer below. % 1994 1994 OA. <-2015 or t> 2015 Oct-2571 O E. > 2571 OB < -2015 OD < -2571 ort...
Q4) A national air traffic control system handled an average of 47,665 flights during 29 randomly...
Q4) A national air traffic control system handled an average of 47,665 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,208 flights per day. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the average number of flights per day handled by the system. The 99% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit...
The manager of The Eastside Brewery in Chicago reports that on six randomly selected weekdays, the number of customers served was as follows: 120 130 1100 205 185 220 She believes that the number of customers served on weekdays follows a normal distribution. a. Construct the 95% confidence interval for the average number of customers served on weekdays. (Round answers to 2 decimal places.) Confidence interval to b. How can the margin of error reported in part a be reduced?...
randomly selected people took an 1Q test A, and next day they took a very similar 1Q test B. Their scores are shown in the table beiow A BCDE FGHI Test A 117 108 93 89 128 98 76104 108 83 Test B 122 109 93 91 12799 76108 107 82 1. Consider (Test A- Test B). Use a 0.01 decimal places level to test the claim that people do bettar on the sacond test than they do on the...
19 25 The sample of six measurements shown below was randomly selected from a normally distributed population. Complete parts a through c. 1,2,3,3,4,1 a. Test the null hypothesis that the mean of the population is 3 against the alternative hypothesis. p < 3. Use a = 0.05 Ifq=0.05, find the rejection region for the test. Choose the correct answer below. % 1994 1994 OA. <-2015 or t> 2015 Oct-2571 O E. > 2571 OB < -2015 OD < -2571 ort...
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