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Stolb23 [73]
3 years ago
6

Many fast-food restaurants have soft drink dispensers with preset amounts, so that when the operator merely pushes a button for

the desired rink the cup is automatically filled. This method apparently saves time and seems to increase worker productivity. A researcher randomly selects 9 workers from a restaurant with automatic dispensers and 9 works from a restaurant with manual dispensers. At a 1% significance level, use the Mann-Whitney U Test to test whether workers with automatic dispensers are significantly more productive. Automatic (Group 1): 153, 128, 143, 110, 152, 168, 144, 137, 118 Manual (Group 2): 105, 118, 129, 114, 125, 117, 106, 92, 126 What is the alternative hypothesis for this study
Mathematics
1 answer:
son4ous [18]3 years ago
6 0

Answer:

The alternative hypothesis is:

<em>Hₐ</em>: The workers with automatic dispensers are more productive than restaurant with manual dispensers.

Step-by-step explanation:

In this case we need to determine whether the workers with automatic dispensers are significantly more productive than restaurant with manual dispensers.

To test this a random sample of 9 workers from a restaurant with automatic dispensers and 9 works from a restaurant with manual dispensers are selected.

The significance level of the test is, <em>α</em> = 0.01.

A Mann-Whitney U test is used to determine whether the randomly selected value from one population is either more than or less than the same value selected from another population.

The hypothesis can be defined as follows:

<em>H₀</em>: The workers with automatic dispensers are as productive as restaurant with manual dispensers.

<em>Hₐ</em>: The workers with automatic dispensers are more productive than restaurant with manual dispensers.

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Answer:

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7 0
2 years ago
For a certain casino slot machine comma the odds in favor of a win are given as 27 to 73. Express the indicated degree of likeli
nikitadnepr [17]

Answer:

The probability is 0.27

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem, we have that:

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This means that for each 27 games that you are expcted to win, you are also expected to lose 73.

So

Desired outcomes:

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Answer:

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7 0
3 years ago
Please help thanks this is due today!
kondaur [170]

D. ({ - 8})^{2}  - 9 + ( - 7) ✅

Step-by-step explanation:

{( - 32 \div4 })^{2}  - 9 + ( - 7) \\  \\  =  ({ - 8})^{2}  - 9 +(- 7 )\\  \\=64-9-7\\\\  = 64 - 16 \\  \\  = 48

<u>Note</u>:-

\sf\red{PEMDAS\: rule.}

P = Parentheses

E = Exponents

M = Multiplication

D = Division

A = Addition

S = Subtraction

\sf\red{(+\:x\:-)\:=\:-}

\sf\red{(-\:x\:-)\:=\:+}

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3 years ago
If 80 is subtracted 80% of its half. How much do you get?
iris [78.8K]
48 is the answer. Hope I'm the brainliest!
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3 years ago
a student says that the square root of 83 is greater than 29/3, is the student correct? justify your reasoning.
Phoenix [80]
29/3=9.66
9.66^2=93.31
But 93.31>83
Therefore the student was wrong
7 0
3 years ago
Read 2 more answers
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