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It's believed that that the mean number of dogs owned by dog-owning households is 2.1 dogs. An SRS of 35 dog owners has xbar =2 and s=.29. Carry out an appropriate test to see if the mean number of dogs owned by dog-owning households is something other than 2.1 dogs. Use a 1% level of significance.
The value of "Z" chosen for constructing (calculating) the confidence interval estimate is determined by
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
using the simple random sample of weights of women from a data set we obtain these sample statistics n40 and x146.82
Suppose the annual consumption of chicken mean is 20.84 pounds per person and that the standard deviation for the consumption of chicken per person is 9.193 pounds.
The number of children, x, belonging to each of eight families registering for swimming was 2, 2, 2, 4, 2, 1, 2, 2. Find the mean, x. (Give answer correct to 2 decimal places.)
Which of the following is true regarding the two smoothing constants of the Forecast Including Trend (FIT) model (which is also called exponential smoothing with trend adjustment)?
Compute the effect size for each of the following average SAT math scores. Remember SAT math is standardized such that u= 500 and standard deviation =100.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
The table given below shows numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status. Determine the probability that they are overweight?
Assume that the duration of human pregnancies can be described by a normal model with mean 268 days and standard deviation 17 days. What percentage of pregnancies should last between 260 and 270 days?
What is the distribution of X? State its mean and variance.
a researcher selects a sample from a population with m 30 and uses the sample to evaluate the effect of a treatment.
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