Atoy manufacturer wants to know how many new toys children can buy each year. he thinks the mean is 6.9 toys per year. assume a previous study found the standard deviation to be 1.3. how large a sample would be required in order to estimate the mean number of toys bought per child at the 98% confidence level with an error at most 0.11 toys?

758

Step-by-step explanation:

Given : Mean :

Standard deviation :

Margin of error :

Significance level :

Critical value :

Formula for sample size  :-

Hence, the minimum required sample size = 758

idk

step-by-step explanation:

step-by-step explanation:

let's assume

number of candles set =x

price of of x candles =p(x)

we are given

a candle maker prices one set of scented candles at $10 and sells an average of 200 sets each week

so, we get point as (200,10)

he finds that when he reduces the price by $1, he then sells 50 more candle sets each week

so, we can find slope

now, we can use point slope form of line

now, we can plug values

we can use point

and find b

now, we can plug it back

and we get

now, we can find revenue

we know that

revenue = price*quantity

so, we get