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1. What are the desirable properties of an estimator of a population parameter?
2. What are the advantages and disadvantages of using point estimates for sta- tistical inference? 3. What are the desirable properties of a confidence interval? How do sample size and the level of confidence (e.g., 90%, 95%, 99%) affect the width of a confidence interval?
a residential treatment facility tests a new group therapy for patients with self-destructive behaviors. the therapists
Given a sample size of 9,245, a sample mean of 38, a standard deviation of 8.15, and a confidence level of 97%, calculate the lower bound of the confidence interval.
randomly selected statistics students of the author participated in an experiment to test their ability to determine
If the P-value of a hypothesis test comparing two means was 0.25, what can you conclude? (Select all that apply):
Using variables below, (1) mention all research questions that would be replied with a Two Way ANOVA test, (2) make null hypotheses for these questions.
a for classes of 142 students find the mean and standard deviation for the number born on the 4th of july ignore leap
The natural number 28A9B consists of different numbers and A is not equal to 0. When the number is divided by 9 the remainder is 7 and when it is divided by 5
a for a representative sample of cars would the correlation between the age of the car and its gasoline economy miles
The shop wants a minimum of 60 man-years experience and wishes to maximize productivity. What machinists should they hire?
Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance.
a researcher is performing a two-way anova using two factors. the first factor has 5 levels and the second factor has 6
A deck of cards is shuffled and then divided into two piles of 26 cards each. We say that a suit is unsplit if all 13 cards of that suit are in the same pile. Compute the probability that at least one suit will be unsplit.
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