Apsychologist has developed an aptitude test which consists of a series of mathematical and vocabulary problems. they want to test the hypothesis that the mean test score is 80.
a random sample of 40 people have taken the test and their results recorded:
download the data
85 73 73 65 63 68 65 79 92 54
65 40 62 60 54 65 85 56 58 58
61 69 76 95 96 78 41 87 66 74
70 85 91 54 68 85 70 43 51 44
you may find this student's t distribution table useful throughout this question.
a)calculate the test statistic (t) for the hypothesis test. give your answer to 4 decimal places.
t =
b)at a level of significance of ? = 0.05, the result of this test is that the null hypothesis is rejectednot rejected.

im alright what do you need

step-by-step explanation:

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

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

25/6 hope it : )

step-by-step explanation: