tinfoQ

2021-01-28

Select all that apply. We show that our sample statistics have (at minimum) a somewhat normal distribution because

this allows us to use t and z critical values.

this allows us to use t and z tables for probabilities.

this tells us that our sampling is appropriate.

normal distributions are cool and that's all we talk about in this class.

this allows us to use t and z critical values.

this allows us to use t and z tables for probabilities.

this tells us that our sampling is appropriate.

normal distributions are cool and that's all we talk about in this class.

Arnold Odonnell

Skilled2021-01-29Added 109 answers

Step 2

The correct option will be first two.

The Explanation as follows,

The z table is used only when the sample is normally distributed. It is used to calculate the probability value and also to get the z critical values. The value of the sample size is being less than 30 that is being an exact sample. On using the t-statistic the critical values are calculated. The t table is used to find the probabilities. Hence, the value of option 3 and 4 is said to be irrelevant.

The correct option will be first two.

The Explanation as follows,

The z table is used only when the sample is normally distributed. It is used to calculate the probability value and also to get the z critical values. The value of the sample size is being less than 30 that is being an exact sample. On using the t-statistic the critical values are calculated. The t table is used to find the probabilities. Hence, the value of option 3 and 4 is said to be irrelevant.

Read carefully and choose only one option

A statistic is an unbiased estimator of a parameter when (a) the statistic is calculated from a random sample. (b) in a single sample, the value of the statistic is equal to the value of the parameter. (c) in many samples, the values of the statistic are very close to the value of the parameter. (d) in many samples, the values of the statistic are centered at the value of the parameter. (e) in many samples, the distribution of the statistic has a shape that is approximately NormalConstruct all random samples consisting three observations from the given data. Arrange the observations in ascending order without replacement and repetition.

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1) y=−2x−3

2) y=2−3x

3) y=2+3x

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What percent of $240$ is $30$$?$

The first 15 digits of pi are as follows: 3.14159265358979

The frequency distribution table for the digits is as follows:

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Which two digits appear for 3 times each?

A) 1, 7

B) 2, 6

C) 5, 9<br<D) 3, 8How to write

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What number is 12% of 45?

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The mean of sample A is significantly different than the mean of sample B. Sample A: $59,33,74,62,87,73$ Sample B: $53,67,72,57,93,79$ Use a two-tailed $t$-test of independent samples for the above hypothesis and data. What is the $p$-value?

What is mean and its advantages?