Consider two independent populations that are normally distributions. A simple random sample of n1=41 from the first population showed x¯1=33, and a simple random of size n2=48n from the second population showed ¯x2=32Suppose s1=9 and s2=10, find a 98% confidence interval for μ1-μ2. (Round answers to two decimal places.)margin of error: lower limit: upper limit:
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Consider two independent populations that are
Suppose s1=9 and s2=10, find a 98% confidence interval for μ1-μ2. (Round answers to two decimal places.)
margin of error:
lower limit:
upper limit:
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- A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.5 seconds. A random sample of 24 sedans has a mean minimum time to travel a quarter mile of 15.4 seconds and a standard deviation of 2.09 seconds. At α=0.01 is there enough evidence to support the consumer group's claim? Complete parts (a) through (d) below. Assume the population is normally distributed.A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.8 seconds. A random sample of 22 sedans has a mean minimum time to travel a quarter mile of 15.5 seconds and a standard deviation of 2.09 seconds. At α=0.01 is there enough evidence to support the consumer group's claim? Complete parts (a) through (d) below. Assume the population is normally distributed (a) Identify the claim and state H0 and Ha. b) THe claim is the _______ hypothesis. c) t= d) p= e) Decide whether to reject or fail to reject the null hypothesis. f) Interpret the decision in the context of the original claim.A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.8 seconds. A random sample of 24 sedans has a mean minimum time to travel a quarter mile of 15.5 seconds and a standard deviation of 2.08 seconds. At α=0.10 is there enough evidence to support the consumer group's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. (a) Identify the claim and state H0 and Ha. H0: muμ ▼ enter your response here Ha: ▼ sigma squaredσ2 muμ sigmaσ pp ▼ not equals≠ greater than or equals≥ greater than> less than< less than or equals≤ equals= enter your response here (Type integers or decimals. Do not round.) The claim is the ▼ alternative null hypothesis.
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