Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Question

Question

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200 adults, 90% said that they have a cell phone. Find the value of the test statistic.

The value of the test statistic is _______

(Round to two decimal places as needed.)

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

Solution :

The null and alternative hypothesis is

H₀ : p = 0.98

H_a : p < 0.98

= 0.90

1 - P₀ = 1 - 0.98 = 0.02

Test statistic = z

= - P₀ / [ $\sqrt$ P_{0 *} (1 - P₀ ) / n]

= 0.90 - 0.98 / [ $\sqrt$ (0.98 * 0.02) / 1200]

= - 0.08 / 0.989941

= - 0.08

The value of test statistic is - 0.08

Add a comment

Answer 2

Similar Homework Help Questions

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1122 adults

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1122 adults, 89% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is _______ (Round to two decimal places as needed.)
Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1226...

Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1226 adults, 90% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is | (Round to two decimal places as needed.)
Claim: Fewer than 90% of adults have a cell phone. In a reputable poll of 1222...

Claim: Fewer than 90% of adults have a cell phone. In a reputable poll of 1222 adults, 84% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is nothing. The value of the test statistic is ______ (round to two decimals places if needed)

Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1053 adults

Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1053 adults, said that they have a cell phone. Find the value of the test statistic. The value of the test is _______ Round to two decimal places as needed
Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1006...

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1006 adults, 88% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is
Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1093...

Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1093 adults, 90% said that they have a cell phone. Find the value of the test statistic.

Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1210...

Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1210 adults,88 % said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is
Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1235...

Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1235 adults, 91% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is
Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1086...

Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1086 adults, 85% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is nothing.

Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1179...

Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1179 adults, 89% said that they have a cell phone. Find the value of the test statistic.

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Homework Answers

Add Answer to:
Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Post as a guest

Earn Coins

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1122 adults

Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1226...

Claim: Fewer than 90% of adults have a cell phone. In a reputable poll of 1222...

Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1053 adults

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1006...

Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1093...

Claim: Fewer than 95% of adults have a cell phone. In a reputable poll of 1210...

Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1235...

Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1086...

Claim: Fewer than 94% of adults have a cell phone. In a reputable poll of 1179...

Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Homework Answers

Add Answer to: Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...

Post as a guest

Earn Coins

Add Answer to:
Claim: Fewer than 98% of adults have a cell phone. In a reputable poll of 1200...