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4 years ago

Can someone please help me with this question?

Mathematics

2 answers:

natima [27]4 years ago

8 0

The answer is 0 percent

iris [78.8K]4 years ago

4 0

It would be 0% because he drove the same number of miles.

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A bag of chips states that it contains 24 oz of chips. A sample of 40 bags finds a mean of 23.7 and a standard deviation of 0.2.

PIT_PIT [208]

Answer:

a) Null hypothesis: $\mu \geq 24$

b) Alternative hypothesis: $\mu < 40$

c) $t=\frac{23.7-24}{\frac{0.2}{\sqrt{40}}}=-9.487$

d) $df=n-1=40-1=39$

$p_v =P(t_{39}$

e) Since the p value is almost 0 we have enough evidence to reject the null hypothesis at the significance level of 0.05

f) Since we reject the null hypothesis we have enough evidence to conclude the true mean is significantly less than 24 ounces

Step-by-step explanation:

Information provided

$\bar X=23.7$ represent the sample mean for the weigth in ounces

$s=0.2$ represent the standard deviation

$n=40$ sample size

$\mu_o =24$ represent the value to verify

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value

Part a

For this case the null hypothesis is:

Null hypothesis: $\mu \geq 24$

Part b

And the alternative would be given by the claim:

Alternative hypothesis: $\mu < 40$

Part c

We don't know the population deviation so then the statistic would be given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

And replacing the data given we got:

$t=\frac{23.7-24}{\frac{0.2}{\sqrt{40}}}=-9.487$

Part d

The degrees of freedom are given by:

$df=n-1=40-1=39$

And the p value for this case would be:

$p_v =P(t_{39}$

Part e

Since the p value is almost 0 we have enough evidence to reject the null hypothesis at the significance level of 0.05

Part f

Since we reject the null hypothesis we have enough evidence to conclude the true mean is significantly less than 24 ounces

5 0

3 years ago

Agnes is redecorating her sewing room. She will need 34 feet of decorative ceiling border and 72 square feet of new carpeting. F

FrozenT [24]

(34×2)+(72×2)

34×2=68
72×2=144
68+144=212
the dimension of the sewing room is 212 square feet

7 0

4 years ago

About how many feet of fencing are needed to enclose a rectangular garden with a 30 ft long side and a 40 ft long side diagonal.

yan [13]

Answer:

i think the answer is d

6 0

4 years ago

What’s the answer to this please? Thank u!

masya89 [10]

Answer:

I think the answer is C.

Step-by-step explanation:

Have a good day ;-).

6 0

3 years ago

Which expression is not a perfect square trinomial?

daser333 [38]

The answer is 64+8y+y².

In a perfect square trinomial, you can divide the value of b by 2 and square it, and it will equal the value of c. This works in every other trinomial listed except this one:

8/2 = 4; 4²=16≠64.

4 0

4 years ago