Which Statement is True? Class, which one of these statements is true? 1. The z

Question

Which Statement is True? Class, which one of these statements is true? 1. The z distribution is similar to the t distribution in that the t distribution is used to decide if there are significant differences in the mean values. 2. The t distribution is seldom a perfect bell-shaped curve. 3· The variance or standard deviation of the sample isn't known for the t distribution. 4· The z distribution is similar to the t distribution in that the critical region for rejecting the null of the t distribution is the same as the z distribution for sample sizes greater than 120. 51&3are true. 6. 7. All of the above are true. 1.2 & 4 are true Reply I Quote & Reply I Report Abuse Previo My Links I Tech Support | Feedback [ Ver: 2.8.29 | -13 Nov 2017 17:36:37- 1 6:19:35 PM MS

Explanation / Answer

Ans:

Options 1,2,4 are correct.

When sample standard deviation,s is known and population standard deviation is unknown,n is less than 30,then we use t distribution.

Larger the sample size,closer the t critical value to the z critical value.

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