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scoray [572]
3 years ago
8

The sugar content of the syrup is canned peaches is normally distributed. Assumethe can is designed to have standard deviation 5

milligrams. A random sample ofn= 10 cans is studied. What is the sampling distribution of the sample variance?The data yields a sample standard deviation of 4.8 milligrams. What is the chanceof observing the sample standard deviation greater than 4.8 milligrams?
Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
8 0

Answer: 0.50477

Step-by-step explanation:

Given : The sugar content of the syrup is canned peaches is normally distributed.

We assume the can is designed to have standard deviation \sigma=5 milligrams.

The sampling distribution of the sample variance is chi-square distribution.

Also,The data yields a sample standard deviation of s=4.8 milligrams.

Sample size : n= 10

Test statistic for chi-square :\chi^2=\dfrac{s^2(n-1)}{\sigma^2}

i.e. \chi^2=\dfrac{(4.8)^2(10-1)}{(5)^2}=8.2944

Now, P-value = P(\chi^2>8.2944)=0.50477  [By using the chi-square distribution table for p-values.]

Hence, the chance of observing the sample standard deviation greater than 4.8 milligrams = 0.50477

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