All categories

3 years ago

For a normal distribution,

Mathematics

1 answer:

Anni [7]3 years ago

7 0

Answer:

1.282, -0.5244,...

Step-by-step explanation:

We know that Z is a standard normal variate with mean =0, and std dev =1

a) z-score separates the highest 10% from the rest of the scores

= 90th percentile = 1.282

b) z-score separates the lowest 30% from the rest of the scores

= 30th percentile = -0.5244

c) z-score separates the lowest 40% from the rest of the scores

= 40th percentile = -0.2533

d) z-score separates the lowest 20% from the rest of the score

=20th percentile = -0.8416

You might be interested in

An office building rents for $40,000 the first year, then increases by 0.5% each year. Use summation notation to represent the t

Sholpan [36]

Given the initial rent is $40000, and the rent is increased by 0.5% each year, the rent in the third year will be given by:
FV=P(1+r)^n
FV=40000(1.05)^n
Thus the answer for the sum of payments for 3 years will be:
The summation is 1.05 raised to n years times $40000, where the years is from 0 to 3.

4 0

4 years ago

Read 2 more answers

1. Fill in the blank with the best regression model for each scm plot: Choose from:

stellarik [79]

Answer:

a: linear

b: quadratic

c: exponential

d: no pattern

Step-by-step explanation:

5 0

3 years ago

Just before a referendum on a school budget, a local newspaper polls 402 voters to predict whether the budget will pass. Suppos

Sliva [168]

Answer:

21.21%

Step-by-step explanation:

Assume that proportion of support follows normal distribution.For resulting in defeat the proportion of support should less than 0.5.Given that the proportion of support is p= 0.52.

Sample size(n)= 402

We know that standard deviation is given as

$\sigma = \sqrt {\dfrac {p(1-p)}{n}}$

Now by putting the values

$\sigma = \sqrt {\dfrac{0.52\times 0.48}{402}}$

σ=0.0249

Proportion of support follows normal distribution with mean is 0.52 and standard deviation is 0.0249

We know that $Z=\dfrac{\bar{X}-\mu }{\sigma }$

$Z=\dfrac{0.5-0.52 }{0.0249}$

Z= -0.80

So P(Z<-.80) =0.2118 from standard table.

So the probability of news paper to predict defeat is 21.21%

7 0

3 years ago

PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME

fredd [130]

You answer would be -4,-5 because you got to look where there line cross

4 0

3 years ago

Which pattern is non-linear?

Zielflug [23.3K]

Answer:

2, 4, 8, 16, 32

 is non-linear pattern

..........................................

Step-by-step explanation:

--------------------------------------

1st

-4+6=2

2+6=8

8+6=14

14+6=20

3rd

3+3=6

6+3=9

9+3=12

12+3=15

4th

5+4=9

9+4 =13

13+4=17

17+4=21

But 

2nd

2×2=4

4×2=8

8×2=16

16×2=32

5 0

3 years ago