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kvasek
1 month ago
5

A team of dermatological researchers were studying skin cancer among 60-70 year old American men. Suppose you were a part of the

research team and take a sample of n =70 men from this age group and calculate the mean number of skin cancer spots in the sample. Also suppose that it is known that the distribution of the number of cancer spots is right-skewed.1. How is the standard deviation of the distribution of sample means related to the population standard deviation of the number of cancer spots?a. The standard deviation of the distribution of sample means is less than the population standard deviation of the number of cancer spots.b. The standard deviation of the distribution of sample means is equal to the population standard deviation of the number of cancer spots.c. The standard deviation of the distribution of sample means is greater than the population standard deviation of the number of cancer spots.
d. We cannot be sure of any of the above answers until we examine the data.
Mathematics
1 answer:
Inessa [12.5K]1 month ago
3 0

Answer:

The right choice is Option A.) The standard deviation of the distribution of sample means is lower than the population standard deviation of the number of cancer spots.

Detailed explanation:

The standard deviation of the distribution of sample means is lower than the population standard deviation of the number of cancer spots.

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Answer:

i ( e^{t} - e^{-t})+ j (cost-sin t)+ k (-15t^{2})

\frac{d}{dx}(e^x) = e^x

Step-by-step explanation:

Step 1:-

We have c1(t) = e^ t i + (sin(t))j + t³k

and c2(t) = e^−t i + (cos(t))j − 6t³k.

By adding c1(t) and c2(t):

c1(t)+c2(t) = e^ t i + (sin(t))j + t³k + e^−t i + (cos(t))j − 6t³k

Now, employing the derivative formula:

\frac{d}{dx}(e^x) = e^x

\frac{d}{dx}(sinx) = cosx\\\frac{d}{dx}(cosx) = -sinx

Next, differentiate with respect to 't'

\frac{d}{dt}c_{1}+ c_{2} } = e^ t i +cost j +3t^2 k - e^-t i - sintj -18t^2 k

By factoring out i, j, and k terms, we arrive at:

\frac{d}{dt}(C_{1} +C_{2} ) = i ( e^{t} - e^{-t})+ j (cost-sin t)+ k (-15t^{2})

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3 months ago
Consider the next 1000 98% CIs for μ that a statistical consultant will obtain for various clients. Suppose the data sets on whi
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Answer:

d) Both blocks experienced equivalent energy loss due to friction

Explanation:

As stated in the question, two tractors are pulling two identical stone blocks the same distance across similar surfacesAdditionally, block A moves at double the speed of block B when completing the race

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Moreover, we understand that

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2 months ago
The perimeter of the triangle is 44cm.if it’s sides are in the ratio 9:7:6.find its area
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Answer:

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6/22 * 44 = 12 cm

Heron’s formula allows us to determine the area of the triangle

First, we calculate s

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Heron’s formula can be expressed as;

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3 months ago
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