Answer to Question #204905 in Statistics and Probability for hhjjik

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Answer to Question #204905 in Statistics and Probability for hhjjik

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Statistics and Probability

Question #204905

Find the area to the left of critical value = 2.500 when the sample size is 29. [Hint: One-tailed test]

Expert's answer

Given sample size = 29, degrees of freedom = n-1= 29-1=28 Looking at t table,

The critical value:

"t_{.99}=2.500"

So, the area to the left of critical value=99%

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Assignment Expert

15.07.21, 23:10

Dear krbyy, please use the panel for submitting a new question.

krbyy

19.06.21, 12:46

1. How does t distribution DIFFER from a normal distribution? A. The t-distribution is centered at 0. B. The t-distribution is symmetric in the middle. C. The t-distribution has a thicker tail. D. The t-distribution has a higher peak. 2. What critical values under t-distribution correspond to degrees of freedom equal to 28 and 90% confidence level on two-tailed test? A. t = ± 12.045 B. t = ± 2.048 C. t = ± 17.01 D. t = ± 1.699

krbyy

19.06.21, 12:45

1. In the absence of the population variance and/or if the sample size is small, which sampling distribution is being used? A. chi distribution B. normal distribution C. z distribution D. t distribution 2. In Student's t-distribution, if the sample size is 25, what is the degree of freedom? A. 23 B. 24 C. 25 D. 26

krbyy

19.06.21, 12:44

Suppose the average age of family members is 34 with a standard deviation of 4. 100 members of the community decided to have a summer outing bonding and relaxation. 1. Find the probability that the average of these members is less than 35 years old. A. 99.38% B. 94.45% C. 91.32% D. 95.00%

krbyy

19.06.21, 12:43

Suppose the average age of family members is 34 with a standard deviation of 4. 100 members of the community decided to have a summer outing bonding and relaxation. 1. Find the z-score corresponding to an average age of 35 years old. A. z = 1.5 B. z = 2.5 C. z = 2.0 D. z = 3.0

krbyy

19.06.21, 12:42

Suppose the average age of family members is 34 with a standard deviation of 4. 100 members of the community decided to have a summer outing bonding and relaxation. 1. What is the mean and standard deviation of the population? A. mean = 34 and st. dev. = 35 B. mean = 34 and st. dev. = 4 C. mean = 100 and st. dev. = 4 D. mean = 35 and st. dev. = 4

krbyy

19.06.21, 12:41

1. The _______ states: "As the sample size n increases, the shape of the distribution of the sample means taken without replacement from a population with mean and the standard deviation o will approach a normal distribution." A. Normal Distribution B. Empirical Rule C. Pythagorean Theorem D. Central Limit Theorem 2. As the sample size n increases, the standard deviation of the sampling distribution _____________. A. decreases B. increases C. not enough information is given D. stays the same

krbyy

19.06.21, 12:40

1. A population consists of the data {1, 2, 3, 4}. How many different samples of size n = 2 can be drawn from the population without replacement? A. 4 B. 6 C. 3 D. 5 2. If a population has a mean of 12.8, what is the mean of the sampling distribution? A. less than 12.8 B. exactly the same as 12.8 C. larger than 12.8 D. closer to 12.8

krbyy

19.06.21, 12:01

A population consists of the data {3, 5, 7, 9, 11}. How many different samples of size n = 3 can be drawn from the population without replacement?

Answer to Question #204905 in Statistics and Probability for hhjjik

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