Before changes to its management staff, an automobile assembly line operation had a scheduled mean completion time of 13.4 minutes. The standarddeviation of completion times was 1.1 minutes. An analyst at the company suspects that, under new management, the mean completion time, μ, is now lessthan 13.4 minutes. To test this claim, a random sample of 42 completion times under new management was taken by the analyst. The sample had a mean of13.3 minutes. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that the population meancompletion time under new management is less than 13.4 minutes? Assume that the population standard deviation of completion times has not changed undernew management.Perform a one-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.)(a) State the null hypothesis Ho and the alternative hypothesis H₁.H :DH₁ :0(b) Determine the type of test statistic to use.(Choose one) ▼(c) Find the value of the test statistic. (Round to three or more decimal places.)0(d) Find the p-value. (Round to three or more decimal places.)(e) Can we support the claim that the population mean completion time undernew management is less than 13.4 minutes?μ3.|xX5☐☐OXS0=0 OSOUo0<0РS

Given that Sample size n=42 Sample mean=13.3 Population standard deviation =1.1 NOTE:- According to…

Answered: e changes to its management staff, an…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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1) According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in 2017. In 2018, a random sample of 36 consumers had a mean of $1667.11 and a standard deviation of $351.69. Can it be said that at the 5% level of significance that the mean level of consumption differed in 2018 with respect to 2017?
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data from the office for national Statistics show that the mean age at which men in greatbritain get married is 30.8 years (the Guardian, february 15, 2013). a news reporternoted that this represents a continuation of the trend of waiting until a later age to wed.a new sample of 47 recently wed british men provided their age at the time of marriage.these data are contained in the datafile britainMarriages. do these data indicate that themean age of british men at the time of marriage exceeds the mean age in 2013? test thishypothesis at a = .05. what is your conclusion?.
A study is done to determine if students in the California state university (CSU) system take longer to graduate, on average, than students enrolled in private universities using the significant level of 5%. One hundred students from both the California state university system and private universities are surveyed. Suppose that from years of research, it is known that the population standard deviations are 1.5811 years for CSU and 1 year for private universities. The following data are collected. The California state university system students took on average 4.5 years with a standard deviation of 0.8. The private university students took on average 4.1 years with a standard deviation of 0.3. What is the decision rule of rejecting the null hypothesis

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