Answer: the population has a mean of less than 30
Explanation:
In interval estimation, the t distribution is applicable only when a. the population has a mean of less than 30. the sample standard deviation (s) is given instead of the population standard deviation
The least weight of a bag in the top 5 percent of the distribution is; 246
From the complete question below, we are given;
Population mean; μ = 240
Population standard deviation; σ = 3
Z-score formula is;
z = (x' - μ)/σ
- Now, we want to find the least weight in the top 5 of the distribution and as such we will use;
1 - 0.05/2 = 0.025 as significance level
Z-score at significance level of 0.025 is 1.96
Thus;
1.96 = (x' - 240)/3
3 × 1.96 = x' - 240
x' = 240 + 5.88
x' = 245.88
Approximating to a whole number gives;
x' = 246
Complete question is;
A machine is used to fill bags with a popular brand of trail mix. The machine is calibrated so the distribution of the weights of the bags of trail mix is normal, with mean 240 grams and standard deviation 3 grams. Of the following, which is the least weight of a bag in the top 5 percent of the distribution?
Read more about z-score at; brainly.com/question/25638875
Answer:
False
Explanation:
Representative democracy, also known as indirect democracy or representative government, is a type of democracy founded on the principle of elected officials representing a group of people, as opposed to direct democracy. ... In it the power is in the hands of the representatives who are elected by the people.
Idiopathic pulmonary fibrosis is a chronic, deadly condition that causes a steady loss in lung function.
The phrase pulmonary fibrosis refers to lung tissue scarring and is the cause of worsening dyspnea (shortness of breath). Fibrosis is commonly connected with a dismal prognosis.
<h3>
What are the symptoms for Idiopathic pulmonary fibrosis?</h3>
The following are some of the primary symptoms of Idiopathic pulmonary fibrosis:
- Breathing difficulty
- a chronic dry cough
- weariness.
- Appetite loss and weight loss
- fingertips that are rounded and swollen (clubbed fingers)
Learn more about Idiopathic pulmonary fibrosis:
brainly.com/question/14732029
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