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ch5 and 6

1. Sampling with replacement results in events that are independant
TRUE, FALSE, ,
2. The density curve is the graph used to represent the values of discrete random varialbe
mean, median, mode, none of the above,
3. the distribution of the sample means approaches a normal distribution as the sample size decreases.
TRUE, FALSE, ,
4. The population distribution is normal if the pattern of the points is reasonably close to a straight line and the points show some systematic pattern
TRUE, FALSE, class website ,
5. The expected value of a discrete random variable is denoted by E and it represents the ........ of the outcomes.
region/distance, area/mean, distance/region, none of the above,
6. A uniform distribution has a bell-shape with total area equal one .
TRUE, FALSE, ,
7. z Score represent the ......... along horizontal while area/prbability represent ...... under the curve
TRUE, FALSE, ,
8. If the original population is normally distributed, then for any sample size n, the sample means will be normally distributed
probability distribution, normal distribution build your own quiz , standard normal distribution, Sampling distribution of a statistic,
9. we can transform the data so that the modified values have a normal distribution by replacing each value of x with
TRUE, FALSE, ,
10. Sample means don%27t target the value of the population mean.
standard deviation, proportions, mode, median,
11. Binomial probability distributions is a special kind of probability distribution
TRUE, FALSE, ,
12. An example of discrete random variable is the number of eggs
standard deviation, range, median, all of the above,
13. Table A-2 is used to find p(z%3c=a) only
TRUE, FALSE, ,
14. distribution of all values of that statistic when all possible samples of the same size are taken from the same population is the difinition of:
TRUE, FALSE, ,
15. In the standard normal distribution the mean equal =0 and the S.D equal 1
TRUE, FALSE, ,
16. In the Central Limit Theorem the mean of the sample means is the population mean and the S.D is the population S.D(standard deviation).
TRUE, FALSE, ,
17. Sample ........... is unbiased estimator
Normal distribution, stem plot, normal quantile plot /normal probability plot, none of the above,
18. The Ryan-Joiner test is one of several formal tests of normality
TRUE, FALSE, ,
19. binomial probability distribution results from a procedure that meets
TRUE, FALSE, ,
20. Sample means and median and proportions are unbiased estimators
log (x %2b 1). , 1/x, x^2, all of above,
21. Sample ......are biased estimators
fixed number of trials, independent trials, outcomes classified into two categories , All of above,