Oasis Company bottles soft drinks using an automatic filling machine. When the process is running properly, the mean fill is 450 ml per can. Each day, the company selects a random sample of 50 cans yields a mean of 451.75 ml and the standard deviation is 7.5 ml?. They then test to determine whether the filling process is working properly. At which significance level a, the null hypothesis is rejected. Ⓒ3% Ⓒ 1% O 5% O 10%
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![QUESTION 24
Oasis Company bottles soft drinks using an automatic filling machine. When the process is running properly, the mean fill is 450 ml per can. Each day, the company selects
a random sample of 50 cans yields a mean of 451.75 ml and the standard deviation is 7.5 ml?. They then test to determine whether the filling process is working properly. At
which significance level a, the null hypothesis is rejected.
Ⓒ3%
Ⓒ1%
Ⓒ 5%
O 10%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0f828b1e-22b4-4995-b1bd-b99e50048e0e%2F99159915-a8df-4843-b8cb-d59518e99f41%2Fqcmgwn_processed.jpeg&w=3840&q=75)
![QUESTION 26
A grocery store owner claims that the mean amount spent per checkout is at least AED 700. We test the hypothesis Ho: 700 versus H₁: <700. The null hypothesis is
rejected. State the appropriate conclusion.
There is enough evidence to conclude that the mean checkout amount is greater than or equal AED 700.
The mean checkout amount is at most AED 700.
The mean checkout amount is greater than AED 700.
O There is not enough evidence to conclude that the mean checkout amount is at least AED 700.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0f828b1e-22b4-4995-b1bd-b99e50048e0e%2F99159915-a8df-4843-b8cb-d59518e99f41%2F1ghg6y9_processed.jpeg&w=3840&q=75)
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Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative hypotheses? OA. Ho: H₁ H₂ H₁: H₁ H₂ OC. Ho: H₁ H¹/₂ H₁: H₁Does color enhance creativity? Test the indicated claim about the standard deviations or variances of two populations. Subjects are given a creativity exercise on a computer with either a red background or a blue background. The scores are shown in the table. At the 0.05 significance level, test the claim that those tested with red background have creativity scores with a standard deviation equal to the standard deviation for those tested with a blue background. 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