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jenyasd209 [6]
3 years ago
5

When testing μ, how do we decide whether to use the standard normal distribution or a Student's t distribution? If the x distrib

ution is normal and n ≥ 30 with known σ we use the Student's t. With the same conditions and unknown σ we use the standard normal. If the x distribution is normal and n ≥ 20 with known σ we use the standard normal. With the same conditions and unknown σ we use the Student's t. If the x distribution is normal and n ≥ 30 with known σ we use the standard normal. With the same conditions and unknown σ we use the Student's t. Whenever we assume the populations are independent, we always use the standard normal.
Mathematics
1 answer:
Helga [31]3 years ago
8 0

Answer:not sure

Step-by-step explanation:

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I am between 24 and 34 . you say my name when you count by twos from zero. you say my name when you count by fives from zero. wh
jonny [76]
The answer is 30

2 * 15 = 30
5 * 6 = 30
30 is between 24 and 34
4 0
3 years ago
Rocky simplified an expression in three steps, as shown below: x to the power of negative 5 multiplied by y to the power of 2, o
maria [59]

Answer:

Step 3 is wrong

Step-by-step explanation:

7 0
3 years ago
Simplify the expression -3 ÷ (-2/5 ​
Harlamova29_29 [7]

Answer:

7.5

Step-by-step explanation:

To solve this expression, we can use PEMDAS or order of operations.

<u>Parenthesis</u>

<u>Exponents</u>

<u>Multiplication>Division (Depends on which comes first from left to right)</u>

<u>Addition>Subtraction (See Multiplication>Division)</u>

So First, lets solve the <u>Parenthesis</u>. -2/5=-.4

So now, our equation is -3/-.4

There is no exponents or multiplication, so lets just <u>Divide</u>.

-3/-.4=7.5

The solution is 7.5

Hope this helps!

6 0
3 years ago
What is the period of the sinusoidal function
rodikova [14]

Answer:

The period of the sine curve is the length of one cycle of the curve. The natural period of the sine curve is 2π. So, a coefficient of b=1 is equivalent to a period of 2π. To get the period of the sine curve for any coefficient b, just divide 2π by the coefficient b to get the new period of the curve.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Bill and Sally Kaplan have an annual spending plan that amounts to $39,500. If inflation is 3 percent a year for the next three
meriva

Answer:

$41,162.71

Step-by-step explanation:

We have the formula to find out the future value of an amount:

FV = PV (1+ r)^{n when:

- PV is the present value

- r : interest rate or inflation rate

- n is the duration

So that, we substitute PV = $39,500, inflation rate = 3% and duration = 3 into the above fomula, we have:

FV = 39,500x(1+ 0.03)^{3} = 41,162.71  is the amount  Kaplans need for their living expenses three years from now

Hope this answer will find you well

3 0
3 years ago
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