Recent research commissioned by Vodafone suggests that older workers are the happiest employees (BBC News, July 21, 2008). The report documents that 70% of older workers in England feel fulfilled, compared with just 50% of younger workers. A demographer believes that an identical pattern does not exist in Asia. A survey of 120 older workers in Asia finds that 75 feel fulfilled. A similar survey finds that 58% of 210 younger workers feel fulfilled. (You may find it useful to reference the appropriate table: z table or t table) At the 5% level of significance, test if older workers in Asia feel less fulfilled than their British counterparts. a-1. Select the null and the alternative hypotheses. multiple choice 1 H0: p = 0.70; HA: p ≠ 0.70 H0: p ≤ 0.70; HA: p > 0.70 H0: p ≥ 0.70; HA: p < 0.70 a-2. Calculate the sample proportion. (Round your answer to 3 decimal places.) a-3. Calculate the value of test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) a-4. Find the p-value. multiple choice 2 p-value ≤ 0.01 0.01 < p-value ≤ 0.025 0.025 < p-value ≤ 0.05 0.05 0.10 a-5. What is the conclusion? multiple choice 3 Older workers in Asia feel less fulfilled Older workers in Asia do not feel less fulfilled
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Recent research commissioned by Vodafone suggests that older workers are the happiest employees (BBC News, July 21, 2008). The report documents that 70% of older workers in England feel fulfilled, compared with just 50% of younger workers. A demographer believes that an identical pattern does not exist in Asia. A survey of 120 older workers in Asia finds that 75 feel fulfilled. A similar survey finds that 58% of 210 younger workers feel fulfilled. (You may find it useful to reference the appropriate table: z table or t table)
At the 5% level of significance, test if older workers in Asia feel less fulfilled than their British counterparts.
a-1. Select the null and the alternative hypotheses.
multiple choice 1
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H0: p = 0.70; HA: p ≠ 0.70
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H0: p ≤ 0.70; HA: p > 0.70
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H0: p ≥ 0.70; HA: p < 0.70
a-2. Calculate the sample proportion. (Round your answer to 3 decimal places.)
a-3. Calculate the value of test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)
a-4. Find the p-value.
multiple choice 2
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p-value ≤ 0.01
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0.01 < p-value ≤ 0.025
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0.025 < p-value ≤ 0.05
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0.05 <p-value ≤ 0.10
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p-value > 0.10
a-5. What is the conclusion?
multiple choice 3
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Older workers in Asia feel less fulfilled
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Older workers in Asia do not feel less fulfilled
At the 5% level of significance, test if younger workers in Asia feel more fulfilled than their British counterparts.
b-1. Select the null and the alternative hypotheses.
multiple choice 4
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H0: p = 0.50; HA: p ≠ 0.50
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H0: p ≤ 0.50; HA: p > 0.50
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H0: p ≥ 0.50; HA: p < 0.50
b-2. Calculate the sample proportion. (Round your answer to 2 decimal places.)
b-3. Calculate the value of test statistic. (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)
b-4. Find the p-value.
multiple choice 5
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p-value ≤ 0.01
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0.01 < p-value ≤ 0.025
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0.025 < p-value ≤ 0.05
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0.05 < p-value ≤ 0.10
-
p-value > 0.10
b-5. What is the conclusion?
multiple choice 6
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Younger workers in Asia feel more fulfilled
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Younger workers in Asia do not feel more fulfilled
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