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mote1985 [20]
3 years ago
8

PLEASE HELP

Mathematics
1 answer:
liubo4ka [24]3 years ago
6 0
I am so sorry I don’t know etheir I will research a litttle and come back later
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A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 50 women ove
Harman [31]

Answer:

Option A is right.

Step-by-step explanation:

Given that a new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 50 women over the age of 50 used the new cream for 6 months. Of those 50 women, 44 of them reported skin improvement(as judged by a dermatologist)

H_0: p=0.40\\H_a: p >0.40

(Right tailed test)

Sample size = 50

Std error of proportion =\sqrt{\frac{pq}{n} } \\=0.0693

p difference=\frac{44}{50} -0.40\\=0.48

Z statistic = p diff/std  error = 6.928

p value <0.00001

Since p is less than alpha, reject null hypothesis.

A. We can reject the null hypothesis that p=0.4 and accept that p>0.4. That is, the cream can improve the skin of more than 40% of women over 50.

4 0
4 years ago
How to solve this problem
shepuryov [24]
I cant tell if this is french or spanish but please translate so we can try to help you
3 0
3 years ago
you have a summer job that pays $5.60 an hour. you get $8.40 an hour for overtime (anything over 40 hours). how many hours of ov
never [62]
287/8.40=34.1666667
34 hours would be too short so you would need to round it up so he would need to work 35 hours but yoh would earn extra money
7 0
3 years ago
PMN is congruent to which angle?<br> OZCBA<br> ZABC<br> ZACB
jeka94

Answer:

Angle CAB.

Step-by-step explanation:

Angle PMN is congruent to Angle CAB.

All we have to do is follow the markers to determine the order to put the letter.

P has the double marker.

C has the double marker.

Since P came first, you put C first.

M has the triple marker.

A has the triple marker.

Since M came second, you put A second.

N has the single marker.

B has the single marker.

Since N came third, you put B third.

8 0
3 years ago
In training for a triathlon, Yuna swam 1.9 miles in the open ocean, which took her 2 hours. For the first part of her swim, she
Nikolay [14]

Answer:

0.7

Step-by-step explanation:

follow the steps........

5 0
3 years ago
Read 2 more answers
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