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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 720 hours. A random sample of 51 light bulbs as a mean of 710.3 hours with a standard deviation of 62 hours. At an α=0.05, can you support the company's claim using the test statistic?
Claim is the alternative, reject the null and support claim as test statistic (-1.12) is not in the rejection region defined by the critical value (-1.96)
Claim is the null, fail to reject the null and support claim as test statistic (-1.12) is not in the rejection region defined by the critical value (-1.645)
Claim is the null, reject the null and cannot support claim as test statistic (-1.12) is in the rejection region defined by the critical value (-1.645)
Claim is the alternative, fail to reject the null and cannot support claim as the test statistic (-1.12) is in the rejection region defined by the critical value (-1.96)
Given the five constraints listed above, how many valid three-digit area codes are there? - Given the five constraints listed above, how many valid seven-digit phone numbers are there?
Verify that P(x) is a probability distribution.- Find the cumulative distribution function.- Find the probability that at most four additional hours are slept.
Suppose that a normal distribution with mean μ=6ml and standard deviationσ= 0.2 ml is a reasonable model for the distribution of the variable x= amount of red dye in the paint mixture. Use the normal distribution model to calculate the following p..
Test the hypothesis that the die is fair (that is, that pi = 1 , i = 1, ... , 6) at the 5 percent level of significance. Use the chi-square approximation.
Listed below are systolic blood pressure measurements? (in mm? Hg) obtained from the same woman. Find the regression? equation, letting the right arm blood
Prepare a report on Jubliee cotton mills case
Describe the sampling distribution of the sample proportion
consider the following. enter your answers to four decimal places.a find the level of confidence assigned to an
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Is the mean for the developed countries higher or lower than the mean for the seven less-developed countries, which is 3.0%?
Determine the population and sampling frame for each of the following: (a) The local public library wants to conduct a customer satisfaction survey.
If you roll a die, the probability of each of the six possible outcomes (1, 2, 3, 4, 5, 6) is 1/6. What is the probability that your roll is even or greater than 4?
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