The following distributions are for that suggested by null hypothesis of Z-test and two of those suggested by the alternative hypothesis (HAI and HA2). Which of the following is correct
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Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
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Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
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Q: The manager of a computer retails store is concerned that his suppliers have been giving him laptop…
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- 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)=__________A firm is bidding to provide T-shirts to football players of the CFL. A sample of 11 slotbacks gave a mean weight of 195.0 lb and standard deviation of 14.3 lb. The firm sells a shirt with just enough stretchiness to fit the variation of sizes of quarterbacks. To test if it would be reasonable to assume that this shirt could also fit all of the slotbacks if you know that the mean for quarterbacks is 192.7 lb and the standard deviation for quarterbacks is 11.7 lb : a. Test if the stretchiness of the shirt is sufficient to fit the spread in the size of slotbacks. b. Test if the average size of the shirts will fit the average size of the slotbacks.
- In the American Heart Association journal Hypertension, researchers report that individuals who practice Transcendental Meditation (TM) lower their blood pressure significantly. If a random sample of 228 male TM practitioners meditate for 7.9 hours per week with a standard deviation of 2.25 hours, does that suggest that, on average, men who use TM meditate more than 7.5 hours per week? Quote a P-value in your conclusion. State the null and alternative hypotheses. Hot = 7.5 H₁: > 7.5 (Type integers or decimals. Do not round.) Find the test statistic. The test statistic is 2.68. (Round to two decimal places as needed.) Find the P-value. The P-value is 0.007 (Round to three decimal places as needed.) xample Textbook Clear all Final checkThe 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 manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sampleis 43.00 months. The lives of all such batteries have a normal distribution with the population standard deviation of 45 months. Find the p-value for the test of hypothesis with the alternative hypothesis that the mean life of these batteries is less than 45 months
- 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?The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.45 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. Find the p-value for the test of hypothesis with the alternative hypothesis that the mean life of these batteries is less than 45 months. Round your answer to four decimal places. p = Will you reject the null hypothesis at a = 0.025 =
- What of the following is not a correct comparison among the Z-distribution and all the t-distributions?A researcher makes a research about the life time of batteries which have a normal distribution with mean of 50 hours and variance of 9 hours. In order to understand the life time of batteries s/he randomly selected 9 batteries and calculate the sample mean as 48 hours and standard deviation of 5 hours. Construct 80 % confidence interval for the true population mean of life time of batteries. 1- a) (45.43, 50.57) b) (46.04, 49.96) c)O There is no correct answer d) (46.72, 49.28) e) (46.36, 49.65) Boş bırakThe 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 4.4 years and a standard deviation of 0.6 years. He then randomly selects records on 38 laptops sold in the past and finds that the mean replacement time is 4.1 years. Find the probability that 38 randomly selected laptops will have a mean replacement time of 4.1 years or less. Round your answer to four decimal places.P(M≤4.1 years)=P(M≤4.1 years)= Based on the result above, does it appear that the computer store has been given laptops of lower than average quality? No. The probability from the sample shows it is unlikely that the owner is given laptops lower than average quality. Yes. The probability from the sample shows that there's a possibility that the owner is given laptops lower than average quality.