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vladimir2022 [97]

3 years ago

15

Explain why the following answer is not correct: 1,000/5=2,000

1 answer:

Tatiana [17]3 years ago

7 0

Well, 1000/5 would be smaller than 2000 not bigger. You are dividing into smaller pieces not multiplying into bigger ones.

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Guys please help I need the answer right now

Vadim26 [7]

11, 13, 15 Rule: Add 2 or +2
1/6, 1/7, 1/8 Rule: Add

8 0

3 years ago

Read 2 more answers

What is the median of these numbers, 78,57,45,70,72? *

lana66690 [7]

Answer:

Step-by-step explanation:

arranging in ascending order

45,57,70,72,78

number of terms=5

median=(5+1)/2=3rd

or median =70

3 0

3 years ago

Read 2 more answers

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sampl

kompoz [17]

Complete Question

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sample of 15 students, the professors find the mean number of headaches is 19 and the standard deviation is 1.7. Assume the population distribution of number of headaches is normal.the correct conclusion at $\alpha =0.001$ is?

Answer:

There is no sufficient evidence to support the professor believe

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 18$

The sample size is $n = 15$

The sample mean is $\= x = 19$

The standard deviation is $\sigma = 1.7$

The level of significance is $\alpha = 0.001$

The null hypothesis is $H_o: \mu = 18$

The alternative hypothesis is $H_a : \mu > 18$

The critical value of the level of significance from the normal distribution table is

$Z_{\alpha } = 3.290527$

The test hypothesis is mathematically represented as

$t = \frac{\= x - \mu }{ \frac{\sigma}{ \sqrt{n} } }$

substituting values

$t = \frac{ 19 - 18}{ \frac{1.7}{ \sqrt{15} } }$

$t = 2.28$

Looking at the value of t and $Z_{\alpha }$ we can see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis.

This mean that there is no sufficient evidence to support the professor believe

3 0

4 years ago

PLEASE HELP <br> a line has a slope of -4 and goes through the point (1,-9)

coldgirl [10]

Using point (0,-4) and (1-9) I had done slope formula and then got -5 for m and b was already found to be -4

Y= -5x + -4

8 0

3 years ago

Rob has a gift card for $50, so far he has selected a shirt for $32 write and solve an inequality to determine the additional am

Lynna [10]

50 is less than or equal to 32+x
x is the additional amount Rob can spend.

3 0

3 years ago