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3 years ago

During your cycling trip, you and your friends often stayed in hostels. The prices of these are listed below.

Mathematics

1 answer:

kiruha [24]3 years ago

7 0

Answer:

a) NTRD standard price = $26.30
b) range: $11.20 to $33.00, a range of $21.80

Step-by-step explanation:

a) The average is the sum divided by the number of contributors. Let n represent the standard price at Night-Time Rest Days. Then ...

... ($22.45 +18.55 +24.50 +11.20 +n)/5 = $20.60

... 76.70 + n = 103.00 . . . . multiply by 5 and collect terms

... n = $26.30 . . . . standard price at NTRD

b) The lowest standard price is $11.20. The highest breakfast price is $33.00. The range is the difference between these ...

... $33.00 -11.20 = $21.80 . . . . range in cost for a single night

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3 years ago

A researchers wants to determine the mean weight of avocados grown in Southern California. The population from which the sample

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Answer: (0.465, 5.535)

Step-by-step explanation:

Formula to calculate the confidence interval (<em>when population standard deviation is unknown</em>) is given by :-

$\overline{x}\pm t_{\alpha/2} \dfrac{s}{\sqrt{n}}$

, where $\overline{x}$ = sample mean.

s= sample standard deviation.

n= Sample size.

$t_{\alpha/2}$ = critical value

By considering the given information , we have

$\overline{x}=6$

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n= 9

Significance level = $\alpha=0.1$ [1-0.90=0.1]

By using students' t distribution -table , the critical value for 95% confidence level :

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[Note: degree of freedom = n-1]

Now, the 90% confidence interval for the true mean weight of these Southern California avocados will be :

$6\pm (1.86) \dfrac{0.75}{\sqrt{9}}$

$6\pm (1.86) \dfrac{0.75}{3}$

$6\pm (1.86) 0.25$

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3 years ago

Mathematicssssssssssss bruhhhhhh

ASHA 777 [7]

Answer: " b = 3 ⅕ ; or, write as: 3.2 .
_____________________________________
Given: "A = (1/2) * b * h " ;

↔ A = (b * h) / 2

2A = (b*h) ;

2A/ h = b ;

↔ b = (2A) / h ;

Given A = 48 ; and h = 30 ; Plug in these values; and solve for "b" ;

→ b = (2*48) / 30 ;

= 96/30 ;

= (96÷6) / (30÷6) ;

→ b = 16/5 ; = 3 <span>⅕ ; or, write as: 3.2 .
_______________________________</span>

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3 years ago