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3 years ago

Help please asap!!!

Mathematics

1 answer:

Inga [223]3 years ago

5 0

Answer: skewed to the right, possible outlier at 12, median at 5

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A well known pharmaceutical manufacturer is manufacturing a newly developed vaccine, and is concerned about variability in the i

Lana71 [14]

Answer:

The null hypothesis is $H_o : \ \sigma^2 = 1.9$

The alternative hypothesis is $H_a : \ \sigma^2 \ne 1.9$

$X^2 = 13.74$

The decision rule is

Reject the null hypothesis

The conclusion is

There is no sufficient evidence to conclude that the variance of the immune response is equal to 1.9.

Step-by-step explanation:

From the question we are are told that

The variance is $\sigma ^2 = 1.9$

The sample size is n = 30

The sample variance is $s^2 = 0.9$

The level of significance is $\alpha = 0.05$

The null hypothesis is $H_o : \ \sigma^2 = 1.9$

The alternative hypothesis is $H_a : \ \sigma^2 \ne 1.9$

Generally the test statistics is mathematically represented as

$X^2 = \frac{ (n- 1 ) * s^2 }{ \sigma^2 }$

=> $X^2 = \frac{ (30 - 1 ) * 0.9 }{1.9 }$

=> $X^2 = 13.74$

Generally from the degree of freedom is mathematically represented as

$df = n- 1$

=> $df = 30 - 1$

=> $df = 29$

Generally from the chi distribution table the critical value of $\frac{\alpha}{2} \ and \ 1 - \frac{ \alpha }{2}$ at a degree of freedom of $df = 29$ is

$X^2 _{ \frac{\alpha }{2} , df } = X^2 _{ \frac{0.05 }{2} , 29 } = 45.7$

=> $X^2 _{ 1 - \frac{\alpha }{2} , df } = X^2 _{1 - \frac{0.05 }{2} , 29 } = 16.0 5$

Gnerally from the values obtained we see that

$X^2 < X^2 _{ 1 - \frac{\alpha }{2} , df }$ hence

The decision rule is

Reject the null hypothesis

The conclusion is

There is no sufficient evidence to conclude that the variance of the immune response is equal to 1.9.

6 0

3 years ago

How old would someone be if they were born on the 30th october 1992 ????

alexdok [17]

Today is March, 19th 2016
so from 1992 have been: 2016 - 1992 = 24 years
but the date is from October 30th, so we are not at 24 years just yet, we are at 23 years and the months and days since last 30th October, that is:
November + December + January + February = 4 months
and some days more, 19 days because today is 19th, so the total is:
23 years, 4 months, 19 days

4 0

3 years ago

Read 2 more answers

Calculate the product below and give your answer in scientific notation.

mihalych1998 [28]

Answer:

0.02549509756

nearest hundredth: 0.03

nearest thousandth: 0.025

nearest ten-thousandth: 0.0255

Step-by-step explanation:

1.3x10^-2 = 0.013

0.013x0.05= .00065

Square root of .00065 is 0.02549509756

5 0

3 years ago

Put some air in your tires: Let X represent the number of tires with low air pressure on a randomly chosen car. The probability

shtirl [24]

Step-by-step explanation:

sorry po hindi ko po alam sagot

5 0

3 years ago

7.8 as a mixed number in simplest form

Goryan [66]

7 4/5

( 7 and 4 fifths)

8 0

3 years ago

Help please asap!!! ​

Help please asap!!!