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vlabodo [156]
3 years ago
8

Which of the following are true? Select one or more:

Mathematics
1 answer:
melamori03 [73]3 years ago
6 0

Answer:

(c) The t-distribution is bell shaped

(e) The t-distribution has more values at the extremes than a standard normal distribution

(f) The t-distribution is centered at 0

Step-by-step explanation:

When the sample size is small or population variance is unknown, and we have to estimate population parameter then t- probability distribution is used.

 The t-distribution has properties as follows:

  1. The mean of t-distribution is 0. Thus, option (f) is correct.
  2. t-distribution is normal. Thus, option (c) is correct.
  3. As compare to standard normal distribution, t-distribution has more values at the extremes. Thus, option (e) is correct.
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(a + b - c )(a + b + c )
denis-greek [22]

Answer:

a^2+b^2-c^2+2ab

Step-by-step explanation:

(a+b-c)(a+b+c)=a^2+ab+ac+ab+b^2+bc-ac-bc-c^2=a^2+b^2-c^2+2ab

Hope this helps!

5 0
3 years ago
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Find the value of x to the nearest tenth.<br> tan Xº = 31
Dmitry_Shevchenko [17]

Answer: the answer is 88.2 and your welcome!!

Step-by-step explanation:

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6 0
3 years ago
For each of the following numbers, write 4 decimals that would round to this whole number when rounde to the nearest whole numbe
Natalka [10]
Round to the nearest whole number:

a) 14 ⇒ 13.5 ; 13.9 ; 14.1 ; 14.4
b) 28 ⇒ 27.5 ; 27.9 ; 28.1 ; 28.4
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d) 50 ⇒ 49.5 ; 49.9 ; 50.1 ; 50.4
e) 67 ⇒ 66.5 ; 66.9 ; 67.1 ; 67.4
f) 71 ⇒ 70.5; 70.9 ; 71.1 ; 71.4
g) 88 ⇒ 87.5; 87.9 ; 88.1 ; 88.4
h) 95 ⇒ 94.5; 94.9 ; 95.1 ; 95.4

If the following number is within the range of 1 to 4 then round down.
<span>If the following number is within the range of 5 to 9 then round up.</span>
8 0
3 years ago
When you divide a whole number by a whole number( other then one), the quotient is a smaller number?
Ostrovityanka [42]
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8 0
3 years ago
129 is 43% of what amount?
solniwko [45]
129/43x100=300
129 is 43% of 300
4 0
3 years ago
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