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3241004551 [841]
3 years ago
13

Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value u

sed to test a null hypothesis.
α = 0.08; H1 is μ ≠ 3.24
Mathematics
1 answer:
Alenkasestr [34]3 years ago
5 0

Answer:

The  value is  1.75 \  and  \   -1.75

Step-by-step explanation:

From the question we are told that

     The null hypothesis is  H_1 :  \mu \ne 3.24

     The level of significance is  \alpha = 0.08

From the z table  the critical value of  \alpha considering the two tails of the normal  curve( This is because this a two tailed test ) is

       z= \pm  1.75

Hence the critical value is  

       1.75 \  and  \   -1.75

         

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A motorcyclist leaves City A and rides at a constant speed towards City B, which is 225 km away. After 1.5 hours, the motorcycli
rewona [7]

Answer:

50 km/hr

Step-by-step explanation:

OK, this is how I solved this problem.

Let r = original rate of speed

     t = time after the stop to finish the trip

Time for trip without stopping is 225/r

(1)     1.5 + .5 + t = 225/r      This is a time equation

(2)    1.5r + t(r + 10) = 225     This is a distance equation

(1)       2 + t = 225/r            (2)      1.5r + tr + 10t = 225

         2r + tr = 225

                tr = 225 - 2r                 1.5r + 225 - 2r + 10(225/r - 2) = 225

                t = 225/r - 2

                                                   -.5r + 225 + 2250/r - 20 = 225

                                                     -5r + 2250 + 22500/r - 200 = 2250

                                                     -5r^2 + 2250r + 22500 - 200r = 2250r

                                                       5r^2 + 200r - 22500 = 0

                                                       5(r^ + 40r - 4500) = 0

                                                           5(r - 50)(r + 90) = 0

                                                                 r = 50   or    r = -90

The rate cannot be negative, so the original speed 50 km/hr

This not an easy problem and I hope you were able to follow my work

5 0
3 years ago
Read 2 more answers
What is the probability that the spinner lands on an even number or on the unshaded section? one-fifth two-fifths three-fifths f
Tasya [4]

The probability that the spinner lands on an even number or on the unshaded section is; 3/5

<h3>How to find the probability?</h3>

From the spinner attached, we see that the number of sections on the spinner is 5 sections.

Now, we can also see that;

Number of even numbers section = 2

Number of shaded sections = 1

Thus, probability that the spinner lands on an even number or on the unshaded section is;

P(even number or unshaded section) = (2 + 1)/5 = 3/5

Read more about Probability at; brainly.com/question/24756209

#SPJ1

5 0
2 years ago
Solve equation (n-1)(n+6)(n+5)=0
Vika [28.1K]
Answer:
1, -6 and -5 

Explanation:
To solve the equation means to get the values of n which satisfy the given equation.
The equation given is:
(n-1) (n+6) (n+5) = 0
This equation will be true if any of the terms (brackets) is equal to zero.
This means that:
either n-1 = 0 .............> n = 1
or n + 6 = 0 ................> n = -6
or n + 5 = 0 ................> n = -5

Hope this helps :)
5 0
3 years ago
Read 2 more answers
Show work please<br> 14 days = ______________ seconds<br><br><br> 1 year = ______________ minutes
zvonat [6]

Answer:

1.21e+6 seconds

525,600 minutes

Step-by-step explanation:

Seconds in 1 day: 86,400

Seconds in 14 days: 1.21e+6

multiply the time value by 86400

525600

multiply the time value by 525600

8 0
3 years ago
Ok this is the last one . lol
Molodets [167]

Answer:

31

Step-by-step explanation:

Because these two angles are supplementary, their angle measures must add up to 180 degrees. Therefore:

3x+2+2x+23=180

5x+25=180

5x=155

x=31

Hope this helps!

6 0
3 years ago
Read 2 more answers
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