2 years ago

Go through my questions there a surprise:)

Mathematics

1 answer:

gtnhenbr [62]2 years ago

8 0

Answer:

I will do that buddy. I'll have fun

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One of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average

Nonamiya [84]

Answer:

0.0930

Step-by-step explanation:

Given that one of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average, 6 days.

she tests a one-sided alternative about the population mean cold duration when drinking coffee, H0: μcoffee = 6 Ha: μcoffee < 6 She finds z = −1.68 with one-sided P-value P = 0.0465.

If hypotheses changed to two tailed as:

$H_0: \mu_{coffee} = \mu_{tea}\\H_a: \mu_{coffee}\neq \mu_{tea}$

(Two tailed test)

Since we have mean difference and std error the same, test statistic would remain the same.

p value for two tailed would be = twice the p value for one tail

= $2(0.0465)\\= 0.0930$

6 0

3 years ago

What’s the answer for this problem I’m very confused and stressed out with this problem

mariarad [96]

Would it help if you wrote it as

$\dfrac{x}{-11} = \dfrac{-3}{1}$ ?

Then you can cross multiply if you know how to do that.

1*x = (-11)(-3)

x = 33 but what happened to the 2 minus signs?

Remember that a ( - ) times a ( - ) = a plus. The two minus signs become a plus.

7 0

3 years ago

Draw and compare models of 3/4 of a pizza pie and 6/8 of a same size pizza pie. Plzzzz help.

ludmilkaskok [199]

Three fourths is the same thing as six eighths so first draw three fourths of a pie shade three out of four next make it into seighths now you have six shaded in!!!(hope this helps!!!;)

6 0

3 years ago

Read 2 more answers

[(12-5). 12] ÷16=?<br>can I please get some help on this? It would be greatly appreciated

lina2011 [118]

i believe it would be 5.25

12-5=7

7*12=84

84/ 16 = 5.25

i hope this helps

8 0

2 years ago