All categories

4 years ago

2. You go to the store to go shopping. You find a jacket you like that costs $50, but you have a coupon for

Mathematics

1 answer:

attashe74 [19]4 years ago

4 0

Answer:

Step-by-step explanation:

U subtract the numbers

You might be interested in

A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes. Kar

ch4aika [34]

Answer:

We conclude that the mean waiting time is less than 10 minutes.

Step-by-step explanation:

We are given that a public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes.

Karen took bus number 14 during peak hours on 18 different occasions. Her mean waiting time was 7.8 minutes with a standard deviation of 2.5 minutes.

Let $\mu$ = mean waiting time for bus number 14.

So, Null Hypothesis, $H_0$ : $\mu \geq$ 10 minutes {means that the mean waiting time is more than or equal to 10 minutes}

Alternate Hypothesis, $H_A$ : $\mu$ < 10 minutes {means that the mean waiting time is less than 10 minutes}

The test statistics that would be used here One-sample t test statistics as we don't know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean waiting time = 7.8 minutes

s = sample standard deviation = 2.5 minutes

n = sample of different occasions = 18

So, test statistics = $\frac{7.8-10}{\frac{2.5}{\sqrt{18} } }$ ~ $t_1_7$

= -3.734

The value of t test statistics is -3.734.

Now, at 0.01 significance level the t table gives critical value of -2.567 for left-tailed test.

Since our test statistic is less than the critical value of t as -3.734 < -2.567, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the mean waiting time is less than 10 minutes.

5 0

4 years ago

Average movie prices in the United States are, in general, lower than in other countries. It would cost $77.79 to buy three tick

sukhopar [10]

Answer:

{Japan: $25.93} {Switzerland: $22.05}

Step-by-step explanation:

It's simple to solve for Japan but for Switzerland you got to do some reverse math.

For Japan all you gotta do is divide the given total by three because you're finding how much one ticket costs and not three. so there you have $25.93

For Switzerland here comes the reverse math. you have to take your $25.93 times 2 because is says "plus two tickets in Japan" so you have $51.86

Now that you've figured out the total of two tickets in Japan, you can subtract that from the given total ($73.91) and the answer is $22.05

6 0

3 years ago

There are several climate zones on Earth. One type of zone is identified by shading on the map below. Together, the darker shade

nikdorinn [45]

Answer:

Step-by-step explanation:

7 0

3 years ago

(Brainliest if fast and correct)

Soloha48 [4]