What is 11/2 divided by 1/2

At a local sandwich shop the average customer spends $25 at dinner with a standard deviation of $2.30. In a simple random sample

oee [108]

Answer:

The probability that the mean receipt for dinner is between $24.50 and $25.50 is

P(24.50≤ x ≤ 25.50)= 0.8324

Step-by-step explanation:

Step(i):-

Given mean of Population(μ) = $25

Given standard deviation of the Population (σ) = 2.30

Sample size 'n' = 40

Let 'X' be the random variable in normal distribution

Given X₁ = 24.50

$Z_{1} =\frac{x-mean}{\frac{S.D}{\sqrt{n} } } = \frac{24.50-25}{\frac{2.30}{\sqrt{40} } } = -1.375$

Given X₂ = 25.50

$Z_{2} =\frac{x-mean}{\frac{S.D}{\sqrt{n} } } = \frac{25.50-25}{\frac{2.30}{\sqrt{40} } } = 1.3751$

Step(ii):-

The probability that the mean receipt for dinner is between $24.50 and $25.50

P(x₁≤ x ≤ x₂) = P(Z₁≤ z ≤ Z₂) = A(Z₂) + A(z₁)

P(24.50≤ x ≤ 25.50) = P(-1.375≤ z ≤ 1.375) = A(1.375) + A(1.375)

P(24.50≤ x ≤ 25.50)= 2 A( 1.375)

= 2 × 0.4162 ( from normal table)

= 0.8324

Final answer:-

The probability that the mean receipt for dinner is between $24.50 and $25.50 is 0.8324

4 0

4 years ago

A z-score of 2.3 means

Alex_Xolod [135]

Answer:

hd wallpaper for desktop computer service the rest is fine but no one has to be the rest of your company is history the day of school and I am writing in response

Step-by-step explanation:

yay I will send you a good day of the E the E the E the day before yesterday but I am not sure if I am writing in response and your E E email address and the E E email E E E E email address and phone number is a great weekend too the rest of the day before yesterday at the E the E the day and I have been a good time for the rest are the rest is a great a again gu the E email address to the E the day and the rest of the day of school and the E E email E E E email E the E the E E email address and the E the E E E E E E E E E E E E email address and the E the E the E the E the rest are you still there the daybzjsvs hd wallpapers for the day of my life with and I will send the day of school and I am not able to make sure that you and the rest are you are the day and time of my resume is madarchod w have a great w

8 0

4 years ago

The set {6, 7, 8, 9, 10} is part of the solution set for which inequality?

slava [35]

7, is the part of the solution set because of the number it has inside of it. 8 years old worth of

4 0

3 years ago

The minute hand of a clock is 8 inches long. How far does the tip of the minute hand move in 30 minutes? How far does it move in

Brrunno [24]

Answer:

In 30 minutes:

The minute hand moves a distance of 25.13 inches

In 20 minutes:

The minute hand moves a distance of 16.76 inches

Step-by-step explanation:

When 60 minutes are completed, the minute hand of the relog makes a complete revolution. The distance s that the minute hand travels when making a complete revolution is:

$s = 2\pi r$ Where r is the radius of the circumference, and in this case, the radius of the minute hand.

So:

$s = 16 \pi$

s = 50.27 inches.

In 30 minutes (which is half of 60) the minute hand covers only half a revolution. Then the distance traveled in 30 minutes is $\frac{1}{2}(s) = 25.13$ inches

In 20 minutes (which is one third of 60) the minute hand only travels a third of a complete revolution. Then the distance traveled in 20 minutes is $\frac{1}{3}(s) = 16.76$ inches

3 0

3 years ago

The figures are similar. Find the missing length. Round to the nearest thousandth. (Hint: this is actually a reduction, the shap

Elena-2011 [213]

Answer:

x = 3.125 ft

Step-by-step explanation:

$\frac{5}{x}=\frac{8}{5} \\8x = 25\\x = \frac{25}{8}=3.125$

3 0

3 years ago