Business, 24.05.2021 19:00 ezequielromero41

The manager of a computer software company wishes to study the number of hours senior executives by type of industry spend at their desktop computers. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours spent per week by industry? Banking Retail Insurance
12 8 10
10 8 8
10 6 6
12 8 8
10 10 10

Answers: 1

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Answers

Since the calculated value of F= 5.733 falls in the critical region we reject the null hypothesis and conclude all three means are not equal.

Explanation:

The given data is

Banking Retail Insurance

12 8 10

10 8 8

10 6 6

12 8 8

10 10 10

The results of excel are:

Anova: Single Factor

SUMMARY

Groups CountSumAverage Variance

Column 1554 10.8 1.2

Column 2540 8 2

Column 3542 8.4 2.8

1) Let the null and alternate hypotheses be

H0: u1=u2=u3 i.e all the three means are equal and

Ha: Not all three means are equal

2) The significance level is set at ∝ =0.05

3)The test statistic to use is

F= sb²/ sw²

which has F distribution with v1= k-1 →3-1=2 and v2= n-k →15-3=12 degrees of freedom

After calculations the following table is obtained.

ANOVA

Source SS df MS F P-value F crit

of Variation

B/w Groups 22.93 2 11.467 5.733 0.01788 3.885

Within Groups 24 12 2

Total 46.93 14

4) The critical region is F ≥ F(0.05, 2,12) = 3.885

5) Since the calculated value of F= 5.733 falls in the critical region we reject the null hypothesis and conclude all three means are not equal.

The manager of a computer software company wishes to study the number of hours senior executives by

Answer from: Quest

The answer is passage 1.

Answer from: Quest

In the 10th grade, i was teamed up in a group of four. our project was on modern history. altho it seemed super hard for many of us. patrick fleming took charge and showed us the understanding of this project. his leadership showed great ethics and it taught me, personally, how to others understand, not just to show them, but explain it thoroughly. and altho he was a great teacher i would have changed a few things. one being his attitude. many times he would get frustrated and impatient with the group. i think a leader i would have done exactly what he did but with much more patience and be there more to explain. such as lunch learning. and giving everybody a chance to try to explain it in their head.

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