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just olya [345]
3 years ago
14

In a test of hypothesis, the null hypothesis is that the population mean is equal to 74 and the alternative hypothesis is that t

he population mean is less than 74. A sample of 20 elements selected from this normal population produced a mean of 68.5 and a standard deviation of 6.4. The significance level is 1%. What is the value of the test statistic, t?a) 6.372
b) -4.076
c) -2.509
d) -3.843
Mathematics
1 answer:
Marrrta [24]3 years ago
6 0

Answer:

Step-by-step explanation:

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Need help ASAP please!!!!
kenny6666 [7]

Answer:

72 divided by 8 = t

Step-by-step explanation:

4 0
2 years ago
Find all real solutions of the polynomial equation. (enter your answers as a comma-separated list.) z^4 + z^3 + z^2 + 3z − 6 = 0
viva [34]
I can't figure out a factor for this but graphing it shows x = -2 and +1 as real roots.
3 0
3 years ago
YO!NEED THIS!!!!!POINTS!!!!!!WILL GIVE THE BRAIN!!!!
DiKsa [7]
The graph is falling on the left hand side and rising on the right hand side.

Since the two ends of graph are in opposite direction, the exponent of variable has to be odd. For an even exponent of leading term, the two ends are in same direction.

Since the graph is falling on left and rising on right, this indicates that the coefficient of leading term is positive.

So, the leading term must have:
1) Odd exponent
2) Positive Coefficient

Thus, option Fourth is the correct answer


5 0
3 years ago
koda Buys 0.75 kg of cortos,which ia 5times the mas of the union he also Buys. How much does the union weigh?
kari74 [83]

Answer:

0.15kg

Step-by-step explanation:

Given data

We are told that

0.75 kg of cortos weights 5times the mas of the onion

We want to find the mass of 1 onion

Hence

0.75 kgcortos = 5 onions

      x cortos = 1 onions

x= 0.75/5

x= 0.15kg

Hence 1 onion will weigh 0.15kg

4 0
3 years ago
Ahhh help please find the perimeter
spin [16.1K]

Answer:

12x^{2} + 6y

Step-by-step explanation:

3 0
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