Interval for the mean weight
A biologist weighs 7 lab mice. The following results were obtained: 31.2, 28.3, 32.8, 29.1, 24.0, 38.2, 33.4 g. Find a 99% confidence interval for the mean weight. Show work
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A building may fail by excessive settlement of foundation or by collapse of the superstructure. Over the life of the building, the probability of excessive settlement of the foundation is estimated to be 0.10,
Sickle-cell anemia is hereditary medical condition affecting red blood cells that is thought to protect against malaria, a debilitating parasitic infection of the liver and blood.
A mammologist gathered 90 female kangaroo rats and 27 of them were pregnant. Employ the normal distribution to find a 95% confidence interval for the pregnancy rate in female kangaroo rats. Show work
You're flipping a fair coin. Initially you just flip it. After that, if it was heads previous round you turn it over to tails (so it guarantees a tails in the current round), and if it was tails you flip it again in the current round. Determine th
Assume the length of time students take in writing a standard entrance examination is normally distributed with mean 60 minutes, std. deviation 8 minutes
In a sample of 112 washers, 8 are "our of spec". Estimate the proportion of washers that are being prodiced tat are out of spec.
Throughout an 80 hour period, there are 7 unplanned work stoppages on production line. Determine the rate per hour at which stoppages occur.
Discuss the difference between mutually exclusive and independent events.
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