Brianna is making fruit dip. The

This graph shows how fast a race car can travel in a stock car race

Nookie1986 [14]

Answer:

C. In 2 seconds, the race car travels 180 meters.

Step-by-step explanation:

7 0

2 years ago

Use this information to answers Questions 1 through 7. The U.S. government provides money to each state to maintain the intersta

vladimir2022 [97]

Answer:

1. Null Hypothesis, $H_0$ : $\mu \leq$ 70 mph

Alternate Hypothesis, $H_A$ : $\mu$ > 70 mph

2. Value of test statistics is 2.652.

Step-by-step explanation:

We are given that Kansas Highway Patrol recorded the speed of 450 interstate vehicles and found the mean speed of 70.2 mph with standard deviation 1.6 mph.

We have to conduct a hypothesis test at significance level 0.01 to decide whether or not to reduce the money sent to Kansas.

Let $\mu$ = true mean speed of all vehicles on the Kansas interstate highway system.

SO, Null Hypothesis, $H_0$ : $\mu \leq$ 70 mph {means that the federal government will not reduce the amount of funding it provides as the speed limit is less than or equal to 70 mph}

Alternate Hypothesis, $H_A$ : $\mu$ > 70 mph {means that the federal government will reduce the amount of funding it provides as the speed limit exceed 70 mph}

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

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