A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 49 orders using the new delivery processyields a sample mean of 27.8 minutes and a sample standard deviation of 5 minutes. Complete parts (a) through (d) below.a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes?State the null and alternative hypotheses for this test.O A. Ho: H5 30H: u> 30Ο Β . Ho: με 27.8O c. H μ2 30H: u<27.8H: u<30O D. Ho: us27.8O E. Ho: H> 30OF. Ho: H<30H4: µ> 27.8H,: us 30H,: µ2 30What is the test statistic for this test?ISTAT =O(Type an integer or a decimal. Round to two decimal places as needed.)What is(are) the critical value(s) for this test?(Type an integer or a decimal. Round to two decimal places as needed. Use commas to separate your answers as needed.)What is the conclusion for this test?Since the test statistic isV than the critical value,the null hypothesis and conclude that there isevidence that the population mean delivery time has been reduced below the previous population mean value of30 minutes.b. Using the p-value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes?What is the p-value for this test?B valuo- OTune an intogor or a docimal Deund to threndocimal nlacee ne nnnded?Click to select vour answerls) A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 49 orders using the new delivery processyields a sample mean of 27.8 minutes and a sample standard deviation of 5 minutes. Complete parts (a) through (d) below,b. Using the p-value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes?What is the p-value for this test?p-value =(Type an integer or a decimal. Round to three decimal places as needed.)What is the conclusion for this test?Since the p-value isV than a,V the null hypothesis and conclude that there isV evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes,c. Interpret the meaning of the p-value in this problem. Choose the correct answer below.O A. The p-value is the probability of selecting a sample of deliveries that has a mean delivery time of 30 minutes or more, given that the population mean delivery time is 27.8 minutes.O B. The p-value is the probability of selecting a sample of deliveries that has a mean delivery time of 27.8 minutes or less, given that the population mean delivery time is 30 minutes.O C. The p-value is the probability of selecting a sample of deliveries that has a mean delivery time of 30 minutes or less, given that the population mean delivery time is 27.8 minutes.O D. The p-value is the probability of selecting a sample of deliveries that has a mean delivery time of 27.8 minutes or more, given that the population mean delivery time is 30 minutes.d. Compare your conclusions in (a) and (b). Choose the correct answer below.O A. Using the critical value approach, the null hypothesis was not rejected and using the p-value approach the null hypothesis was not rejected. The critical value approach and the p-value approach are two different methods of finding thesame answer.O B. Using the critical value approach, the null hypothesis was rejected and using the p-value approach the null hypothesis was rejected. The critical value approach and the p-value approach are two different methods of finding the sameanswer.O C. Using the critical value approach, the null hypothesis was rejected and using the p-value approach, the null hypothesis was not rejected. The critical value approach and the p-value approach yield opposite results.O D. Using the critical value approach, the null hypothesis was not rejected and using the p-value approach, the null hypothesis was rejected. The critical value approach and the p-value approach yield opposite results.

Name: A manager of a pizza restaurant has changed the restaurant's delivery
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 49 orders using the new delivery processyields a

Given Information: μ=30 n=49 x¯=27.8 s=5 α=0.01

Math

Statistics

A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 49 orders using the yields a sample mean of 27.8 minutes and a sample standard deviation of 5 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. O A. Ho: us30 H;:u> 30 O D. Ho: us27.8 O B. Ho: H227.8 OC. Ho: H230 H: u<27.8 H:u<30 O E. Ho: > 30 H4: us 30 OF. Ho: H<30 H,: u2 30 H4: u> 27.8 What is the test statistic for this test? ISTAT =O (Type an integer or a decimal. Round to two decimal places as needed.) What is(are) the critical value(s) for this test?

A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 49 orders using the yields a sample mean of 27.8 minutes and a sample standard deviation of 5 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. O A. Ho: us30 H;:u> 30 O D. Ho: us27.8 O B. Ho: H227.8 OC. Ho: H230 H: u<27.8 H:u<30 O E. Ho: > 30 H4: us 30 OF. Ho: H<30 H,: u2 30 H4: u> 27.8 What is the test statistic for this test? ISTAT =O (Type an integer or a decimal. Round to two decimal places as needed.) What is(are) the critical value(s) for this test?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. O C. Ho: µ> 30 H1: µs 30 Ο Α. Η0: μ2 27.3 Ο Β . Ηρ: με 30 H1: µ 30 O F. Ho: µs 27.3 H,: µ> 27.3 O D. Ho: µ< 30 Ο Ε. Ho: μ2 30 H,: µ2 30 H,: µ<30
Many cheeses are produced in the shape of a wheel. Because of the differences in consistency between these different types of cheese, the amount of cheese, measured by weight, varies from wheel to wheel. Heidi Cembert wishes to determine whether there is a significant difference, at the 10% level, between the weight per wheel of Gouda and Brie cheese. She randomly samples 18 wheels of Gouda and finds the mean is 1.3 lb with a standard deviation of 0.3 lb; she then randomly samples 10 wheels of Brie and finds a mean of 0.95 lb and a standard deviation of 0.21 lb. What is the df and p-value for Heidi's hypothesis of equality? Assume normality. (Give your answer correct to four decimal places.)
The south African department of health is concerned that the average percentage mark-up on a particular products during the dawn of covid-19 pandemic is 41% or above. To test their concern, they sampled 40 that sell the product, and found that the mean percentage mark-up was 49.1%. Assume that the population deviation of the percentage mark-up is 18.7% and answer the following questions: What is the appropriate test statistic for this management scenario? Why?
Gestation Periods of Humans. For humans, gestation periods are normally distributed with a mean of 266 days and a standard deviation of 16 days. Suppose that you observe the gestation periods for a sample of nine humans. a. Theoretically, what are the mean and standard deviation of all possible sample means? b. Use the technology of your choice to simulate 2000 samples of nine human gestation periods each. c. Determine the mean of each of the 2000 samples you obtained in part (b). d. Roughly what would you expect the mean and standard deviation of the 2000 sample means you obtained in part (c) to be? Explain your answers. e. Determine the mean and standard deviation of the 2000 sample means you obtained in part (c). f. Compare your answers in parts (d) and (e). Why are they different?
A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 bus miles. Bus mechanical reliability is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of 100 buses resulted in a sample mean of 3,875 bus miles and a sample standard deviation of 275 bus miles. Complete parts (a) and (b) below. Question content area bottom Part 1 a. Is there evidence that the population mean bus miles is more than 3,800 bus miles? (Use a 0.05 level of significance.) State the null and alternative hypotheses. The critical value(s) for the test statistic is(are) (Round to two decimal places as needed. Use a comma to separate answers as needed.)
A supplier is selling lumber to a building supply company. The building supply company requires that the overall length of a particular type of board measure between 95.9 and 96.1 inches. Before sending its next shipment, the supplier collects a large sample of boards and determines the mean length of the sample is 96.03 inches, with a standard deviation of 0.029 inches. What is the process capability index of the current process? Two decimal places.
Pandemic-fueled challenges forced consumers to wait significantly longer in drive-thru lanes. QSR magazine studied drive-thru times for 10 fast-food restaurants the lengths of time customers would spend in the drive-thru lane – and found that KFC in 2020, had the shortest mean time with a mean time spent in the drive-through lane of 283.3 seconds. Assuming drive-through times are Normally distributed with a standard deviation of 33 seconds, answer the following. a. What percentage of drive-through times at KFC will last more than 300 seconds? b. The longest 10% of drive-through times are longer than how many seconds? round top the nearest second. c. If we select a customer in the drive-through lane at KFC at random, what is the probability that their drive-through time is between 275 and 290 seconds? d. Dring Lunchtime, it is estimated that 230 customers go through the drive-thru, how many customers have to wait for less than 305 seconds.
i need C and D
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
The average time taken for your Internet service provider to remotely resolve a trouble ticket has a Normal distribution with a mean of 4.3 hours and a standard deviation of 3.1 hours. What percent of the time can you expect to wait longer than a full 8-hour business day for a resolution?
A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 55 months and a standard deviation of 8 months. Using the empirical rule (as presented in the book), what is the approximate percentage of cars that remain in service between 31 and 47 months?