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kiruha [24]
2 years ago
8

According to the Pew report, 14.6% of newly married couples in 2008 reported that their spouse was of another race or ethnicity

(CNNLiving, June 7, 2010). In a similar survey in 1980, only 6.8% of newlywed couples reported marrying outside their race or ethnicity. Suppose both of these surveys were conducted on 120 newly married couples. Use Table 1.
a.
Specify the competing hypotheses to test the claim that there is an increase in the proportion of people who marry outside their race or ethnicity.

H0: p1 − p2 ≤ 0; HA: p1 − p2 > 0
H0: p1 − p2 = 0; HA: p1 − p2 ≠ 0
H0: p1 − p2 ≥ 0; HA: p1 − p2 < 0
Mathematics
1 answer:
sweet [91]2 years ago
3 0
Shisiekkd. Wklwlwl kalwow wish is owl am dh Wii’s all wish wishfully usnan2839 7 hessian
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The purchase price of a camcorder is ​$648. What is the total price if the sales tax rate is 6.5​%?
shepuryov [24]
$648 * 1.065 = $690.12
6 0
2 years ago
What is the “mean” of this number sequence? 4, 2, 2, 2, 5, 15
Debora [2.8K]
The mean is found by dividing the sum of all terms by the number of terms present in the set.

Set up the equation:

\frac{2 + 2 + 2 + 4 +5 + 15}{6} = \frac{30}{6} = 5

The mean of this sequence is 5.

4 0
3 years ago
Read 2 more answers
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.972 g and a standard deviation
zalisa [80]

Answer:

P( ¯ x < 0.929 g) = 0.1867

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 0.972, \sigma = 0.289, n = 36, s = \frac{0.289}{\sqrt{6}} = 0.0482

Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly selecting 36 cigarettes with a mean of 0.929 g or less. P( ¯ x < 0.929 g) =

This is the pvalue of Z when X = 0.929. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{0.929 - 0.972}{0.0482}

Z = -0.89

Z = -0.89 has a pvalue of 0.1867. So

P( ¯ x < 0.929 g) = 0.1867

7 0
3 years ago
Rewrite the fraction as a decimal -19/50
Mama L [17]
Rewrite the fraction as a decimal
-19/50 = -0.38

8 0
3 years ago
During the 1998-1999 season, the Panthers played 40 games. They lost 14 more games that they won. How many games did they win th
lyudmila [28]

Step-by-step explanation:

if x is games won

then games lost is x+14

total no of games=40

x+x+14=40

2x=40-14

x=13 games won

8 0
2 years ago
Read 2 more answers
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