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1 year ago

2/3 employees of a company drive to work, 1/3 travel by bus and the rest walk . find the number of who walk.

Mathematics

1 answer:

olasank [31]1 year ago

8 0

Zero
2/3 drive plus 1/3 bus = 3/3 or 1 whole
Cannot be any that walk

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Yuki888 [10]

Answer:

a) $t_{crit}= 1.34$

b) $t_{crit}=-2.539$

c) $t_{crit}=\pm 2.228$

Step-by-step explanation:

Part a

The significance level given is $\alpha=0.1$ and the degrees of freedom are given by:

$df = n-1= 15$

Since we are conducting a right tailed test we need to find a critical value on the t distirbution who accumulates 0.1 of the area in the right and we got:

$t_{crit}= 1.34$

Part b

The significance level given is $\alpha=0.01$ and the degrees of freedom are given by:

$df = n-1= 20-1=19$

Since we are conducting a left tailed test we need to find a critical value on the t distirbution who accumulates 0.01 of the area in the left and we got:

$t_{crit}=-2.539$

Part c

The significance level given is $\alpha=0.05$ and $\alpha/2 =0.025$ and the degrees of freedom are given by:

$df = n-1= 11-1=10$

Since we are conducting a two tailed test we need to find a critical value on the t distirbution who accumulates 0.025 of the area on each tail and we got:

$t_{crit}=\pm 2.228$

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2/3 employees of a company drive to work, 1/3 travel by bus and the rest walk . find the number of who walk.​

2/3 employees of a company drive to work, 1/3 travel by bus and the rest walk . find the number of who walk.