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katen-ka-za [31]
3 years ago
12

The weights of running shoes are normally distributed with an unknown population mean and standard deviation. If a random sample

of 31 running shoes is taken to estimate the mean shoe weight, what t-score should be used to find a 98% confidence interval estimate for the population mean
Mathematics
1 answer:
faltersainse [42]3 years ago
3 0

Answer:

The t-score is t = 2.457.

Step-by-step explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 31 - 1 = 30

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 30 degrees of freedom(y-axis) and a one-tailed confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 2.457.

The t-score is t = 2.457.

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3 years ago
Which movie had a greater range of ages of the audience? (Hint: The range is the difference between the max and min values)
dexar [7]
<h3>Answer: Movie B</h3>

Range = max - min

Visually the min and max are the leftmost and right most points on the whiskers. This is assuming we don't have outliers in either direction. The range represents the total width of the box and whisker plot. For movie B, it is wider, so therefore it has a larger range of ages.

We could compute the ranges numerically and compare to see which is bigger, or we could align one endpoint (say the right endpoints) to see that movie B has a wider range.

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4 years ago
5x -4= 4x please help me
nadezda [96]

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The function h(x) is a transformation of the square root parent function,
Setler [38]

The function h(x) is a transformation of the square root parent function,

f(x)=√x. The function is h(x) A: √x+5.

<h3>What is Transformations?</h3>

Transformations come in the form;

y =√(x-h) +k,

where h is responsible for left-right movements, and k is responsible for up-down movements.

From the graph, we can see that f(x) is simply the parent square root function, √x.

To translate a function right by p units and up by q units, the function becomes

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To get h(x), there is a translation of 5 units to the left, which can be represented by a value of h = -5.

h(x) = f(x + 5) +0

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Hence, The function h(x) is a transformation of the square root parent function, f(x)=√x. The function is h(x) A: √x+5.

Learn more about function here:

brainly.com/question/2253924

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2 years ago
Need help fast Thank
ollegr [7]
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