we wish to estimate μ, the mean length of the fish in our pond. we take a random sample of 65 fish and measure their lengths. for this sample, we find an average length of 4.53 cm, and a standard deviation of 0.8cm.
i) using our observations as a pilot study, determine the sample size needed to estimate the mean μ within 0.1cm with 95% confidence.
ii) find the upper confidence interval for μ
we wish to estimate μ, the mean length of the fish in our pond. we take...
A campus of Wolf City College has a fish pond. Suppose there are 20 fish in the pond the lengths of the fish(in inches) are given below: 4.5, 5.4, 10.3, 7.9, 8.5, 6.6, 11.7, 8.9, 2.2, 9.8, 6.3, 4.3, 9.6, 8.7, 13.3, 4.6, 10.7, 13.4, 7.7, 5.6 a) how many different possible samples of size 3 can come out of this population? b) suppose we have randomly catch a sample of 3 fish from this pond and measure their length....
Consider a population having a standard deviation equal to 9.96. We wish to estimate the mean of this population. (a) How large a random sample is needed to construct a 95% confidence interval for the mean of this population with a margin of error equal to 1? (Round your answer to the next whole number.) The random sample is units. (b) Suppose that we now take a random sample of the size we have determined in part a. If we...
You wish to estimate the mean number of travel days per year for salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 36 days. If you want to estimate the population mean within 7 days, how many salespeople should you sample? Use the 90% confidence level.
If you wish to estimate a population mean to within 0.2 using a 95% confidence interval and you know from prior sampling that is approximately equal to 5.4, how many observations would you have to include in your sample? Thank You!
The length of a fish species has a normal distribution with a mean of 16cm and a standard deviation of 6cm. A) what is the IQR of the lengths of these fish? B) What is the length of the range in which the middle 95% of the fish lie? C) The upper and lower deciles are the points that mark out the highest 10% and the lowest 10% of the population. Find the upper and lower deciles for the fish...
If you wish to estimate a population mean with a margin of error MEequals=0.33 using a 95% confidence interval and you know from prior sampling that σ2 is approximately equal to 4.6 how many observations would have to be included in your sample? The number of observations that would have to be included in your sample is (______) (Round up to the nearest observation.)
If you wish to estimate a population mean with a sampling distribution error SE = 0.34 using a 95% confidence interval and you know from prior sampling that σ² is approximately equal to 5.9, how many observations would have to be included in your sample?
If you wish to estimate a population mean with a margin of error ME=0.24 using a 95% confidence interval and you know from prior sampling that sigma squaredσ2 is approximately equal to 4.84, how many observations would have to be included in your sample? The number of observations that would have to be included in your sample is (_______) (Round up to the nearest observation.)
If you wish to estimate a population mean with a margin of error ME=0.24 using a 95% confidence interval and you know from prior sampling that sigma squaredσ2 is approximately equal to 4.8, how many observations would have to be included in your sample? The number of observations that would have to be included in your sample is __________. (Round up to the nearest observation.)
If you wish to estimate a population mean with a sampling distribution error SE= 0.33 using a 95% confidence interval and you know from prior sampling that is approximately equal to 7.6, how many observations would have to be included in your sample? The number of observations that would have to be included in your sample is (Round up to the nearest observation.)