Question

# For the standard normal distribution, compute Z0.69. Use Excel and round the answer to two decimal...

1. For the standard normal distribution, compute Z0.69. Use Excel and round the answer to two decimal places.
2. Consider the following test performed with the level of significance 0.01: A random sample of size 28 is obtained from a normally distributed population. The population standard deviation is equal to 3.6. The sample mean happened to be 24. For this hypothesis test, what will be the critical value (the relevant z-alpha)?  Round the answer to three decimal places.
3. A probability distribution of all possible sample proportions of a given sample size is called the sampling distribution of the sample ----------
4. Select the false statement.

a. When t-numbers are used for computing the width of a confidence interval, the corresponding Student's t-distribution follows (n-1) degrees of freedom, where n is the sample size.

b. One should use z-numbers when estimating the population proportion.

c. When one knows the standard deviation of the population, one must use t-numbers to determine the width of a confidence interval.

d. If all other relevant variables are kept the same, than the bigger the sample size, the narrower the confidence interval is. #### Earn Coins

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