is done to test the claim that company a retains it's workesrs longer that company B. Company A samples 16 workes , and their average time with the company is 5.2 years with a standard deviation of 1.1. company B samples
Q: find the probability that 25 randomly selected laptops will have a mean replacment time of 4.1 years…
A: Given:
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A: Solution: It is given that a small paint manufacturing company has a daily production that is…
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Q: A study is done to determine if Company A retains its workers longer than Company B. It is believed…
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A: HERE GIVEN , The manager of a computer retails store is concerned that his suppliers have been…
Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: Given that: Population mean, μ=1750 Population standard deviation, σ=95 Sample size, n=11 Sample…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Given mean of 3.9 years and a standard deviation of 0.4 years.
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
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Q: A study is done to determine if Company A retains its workers longer than Company B. The populations…
A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…
Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: claim : μ > 1925n = 150x¯ = 1936σ = 60α = 0.05
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Q: A study is done to determine if Company A retains its workers longer than Company B. It is believed…
A: The following information has been given: n1=29 n2=21x¯1=5.85…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: GIven Information: Population mean (u) = 4.1 years Standard Deviation (σ) =0.4 years Sample mean…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A:
Q: The manager of a computer retails store is concerned that his suppliers have been givir computers…
A:
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: We have to find fiven probability.
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Given that the mean is 3.7 years and the standard deviation is 0.4 years. Sample size is 42.…
Q: A study is done to test the claim that Company A retains its workers longer than Company B. Company…
A: The given information’s areNumber of samples in company A is 16.Mean time of company A is…
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A: Given Data : For Sample 1 x̄1 = 17.0 σ1 = 6.9 n1 = 300 For Sample 2…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: The random variable replacement time follows normal distribution. The population mean is 4.5 and…
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A: GivenMean(μ)=30.5standard deviation(σ)=5
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Given information- Population mean, µ = 3.8 years Population standard deviation, σ = 0.6 years…
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A: 1) We have to test that mean time is longer than 15 days
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: The answer is attached below,
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A:
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: GivenMean(μ)=3.2standard deviation(σ)=0.5sample size(n)=35
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Given,sample size(n)=35mean(μ)=3.2standard deviation(σ)=0.5
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A: Solution: Let X be the lifespan guarantee on its new LED light. From the given information, X…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Here, µ=4.4, σ=0.5, and n=51.
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Given data: Mean = 3.6 Standard deviation = 0.6
Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: We have given that Sample size n =150 Sample mean =1878 Population standard deviation =50 NOTE:-…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: From the given information, the population mean is 4.2 years and the population standard deviation…
Q: he manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: The provided information are: Population mean μ=3.8 Population standard deviation σ=0.4 Sample size…
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Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A:
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: We have given that Mean(µ) = 3.1Standard deviations (σ) = 0.4X ~ N (µ, σ )= N(3.1, 0.4) n = 39
Q: Carry your intermediate computations to three or more decimal places, and round your responses as…
A: Given that, Let μ be the population mean breaking strength of the cables. Population mean (μ) =…
Q: Assuming that the laptop replacment times have a mean of 4 years and a standard deviation of 0.4…
A: Solution: Let X be the laptop replacement times. From the given information, X follows normal…
Q: he breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: as per bartleby guideline expert have to answer first three subpart only dear student please upload…
Q: A company that runs a chain of quick oil change centers, tries to attract customers by claiming that…
A: Given: Population standard deviation σ = 15 Sample size n = 40 Confidence interval = 15 and 25…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Let the random variable X denote laptop replacement times. It is given that X is normally…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Solution: Let X be the replacement times for the model laptop of concern are normally distributed…
Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: 1)GivenMean(μ)=3.2standard deviation(σ)=0.5sample size(n)=35The replacement time is 3 years
Q: he manager of a computer retails store is concerned that his suppliers have been giving him laptop…
A: Concept of sampling distribution of sample mean: Let a particular characteristic of a population is…
A study is done to test the claim that company a retains it's workesrs longer that company B. Company A samples 16 workes , and their average time with the company is 5.2 years with a standard deviation of 1.1. company B samples 21 workers, and their average time with the company is 4.6 years with a standard deviation of 0.9. the populations are
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- The breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1775 pounds and a standard deviation of 60 pounds. The company believes that, due to an improvement in the manufacturing process, the mean breaking strength, μ, of the cables is now greater than 1775 pounds. To see if this is the case, 90 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1788 pounds. Can we support, at the 0.05level of significance, the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1775 pounds? Assume that the population standard deviation has not changed. 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. a. State the null hypothesis H0 and the alternative hyposthesis H1. b. Find the value of the test statistic. c. Find the p-value. d. Can we…The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.1 years and a standard deviation of 0.5 years. He then randomly selects records on 42 laptops sold in the past and finds that the mean replacement time is 3.9 years.Assuming that the laptop replacement times have a mean of 4.1 years and a standard deviation of 0.5 years, find the probability that 42 randomly selected laptops will have a mean replacement time of 3.9 years or less.P(M < 3.9 years)The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.6 years and a standard deviation of 0.4 years. He then randomly selects records on 48 laptops sold in the past and finds that the mean replacement time is 3.4 years. Assuming that the laptop replacement times have a mean of 3.6 years and a standard deviation of 0.4 years, find the probability that 48 randomly selected laptops will have a mean replacement time of 3.4 years or less. P(M < 3.4 years)=__________
- It is known that the distributions life spans of iPhones and Android phones are both skewed to the right. Apple iPhones (P) have a life span distribution with a mean of 15 months and a standard deviation of 4.2 months. The distribution of life spans of Android phones (A) has a mean of 13.4 months and a standard deviation of 3.7 months. Suppose we select an SRS of 35 iPhones and a second sample of 40 Android phones. What is the probability that the sample mean lifespan for the Android is greater than the sample mean lifespan for the iPhone? O a 0.029 O b Oc 0.041 0.959 0.971 0.050The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.4 years. He then randomly selects records on 25 laptops sold in the past and finds that the mean replacement time is 3.2 years.Assuming that the laptop replacement times have a mean of 3.3 years and a standard deviation of 0.4 years, find the probability that 25 randomly selected laptops will have a mean replacement time of 3.2 years or less.P(M < 3.2 years) = Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.Based on the result above, does it appear that the computer store has been given laptops of lower than average quality? No. The probability of obtaining this data is high enough…The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.1 years and a standard deviation of 0.6 years. He then randomly selects records on 41 laptops sold in the past and finds that the mean replacement time is 3.9 years.Assuming that the laptop replacement times have a mean of 4.1 years and a standard deviation of 0.6 years, find the probability that 41 randomly selected laptops will have a mean replacement time of 3.9 years or less.P(M < 3.9 years) = Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.Based on the result above, does it appear that the computer store has been given laptops of lower than average quality?
- The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.7 years and a standard deviation of 0.5 years. He then randomly selects records on 52 laptops sold in the past and finds that the mean replacement time is 3.6 years. Assuming that the laptop replacement times have a mean of 3.7 years and a standard deviation of 0.5 years, find the probability that 52 randomly selected laptops will have a mean replacement time of 3.6 years or less. P(M3.6 years) = Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. Based on the result above, does it appear that the computer store has been given laptops of lower than average quality? Yes. The probability of this data is unlikely to have occurred…The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.8 years and a standard deviation of 0.5 years. He then randomly selects records on 36 laptops sold in the past and finds that the mean replacement time is 3.5 years.Assuming that the laptop replacment times have a mean of 3.8 years and a standard deviation of 0.5 years, find the probability that 36 randomly selected laptops will have a mean replacment time of 3.5 years or less.P(¯xx¯ < 3.5 years) = Enter your answer as a number accurate to 4 decimal places.Based on the result above, does it appear that the computer store has been given laptops of lower than average quality?A study is done by a community group in two neighboring colleges to determine which one graduates students with more math classes. College A samples 11 graduates. Their average is 4 math classes with a standard deviation of 1.5 math classes. College B samples 9 graduates. Their average is 3.5 math classes with a standard deviation of 0.95 math class. The community group believes that a student who graduates from college A has taken more math classes, on the average. Both populations have a normal distribution. Test at a = significance level. Which distribution do you use to perform the test and what is P-values? What is your conclusion ? O a. t-test and P-value =0.1990, reject H O b. t-test and P-value =0.1990, do not reject Ho O C. z-test and P-value =0.1990, reject H. O d. z-test and P-value =0, reject Ho e. z-test and P-value =0.1990, do not reject Ho
- The manager of a computer retail store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.9 years and a standard deviation of 0.6 years. He then randomly selects records on 47 laptops sold in the past and finds that the mean replacement time is 3.7 years. Assuming that the laptop replacement times have a mean of 3.9 years and a standard deviation of 0.6 years, find the probability that 47 randomly selected laptops will have a mean replacement time of 3.7 years or less. P(M≤ 3.7 years) - Enter your answer rounded to 4 decimal places.The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.5 years and a standard deviation of 0.4 years. He then randomly selects records on 48 laptops sold in the past and finds that the mean replacement time is 4.4 years.Assuming that the laptop replacement times have a mean of 4.5 years and a standard deviation of 0.4 years, find the probability that 48 randomly selected laptops will have a mean replacement time of 4.4 years or less.P(M < 4.4 years) = Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.A survey found that women's heights are normally distributed with mean 63.9 in. and standard deviation 2.9 in. The survey also found that men's heights are normally distributed with mean 69.5 in. and standard deviation 3.4 in. Most of the live characters employed at an amusement park have height requirements of a minimum of 57 in. and a maximum of 64 in. If the height requirements are changed to exclude only the tallest 50% of men and the shortest 5% of men, what are the new height requirements?
