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OLEGan [10]
3 years ago
13

Please help!! I'm desperate!!

Mathematics
1 answer:
ivann1987 [24]3 years ago
7 0
I would help .. but there’s no pictures lol. But no worries! The same thing happened to me
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3806 divided by 22=?
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the answer to 3806 divided 22 is 173


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Twenty students in Class A and 20 students in Class B were asked how many hours they took to prepare for an exam. The data sets
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"The mean study time of students in Class B is less than students in Class A" is the statement among the following choices given in the question that is true for the data sets. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer helped you.
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At a local bodega, the cost of a bottle of soda at the corner store is $1.20, and the cost of a bottle of juice is $1.05. What w
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<u>Part</u><u> </u><u>1</u> 6(1.20)+4(1.05)=$11.40

<u>Part</u><u> </u><u>2</u> 1.20x+1.05y

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2 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

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2 years ago
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