What is the answer?please

A study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name br

Marianna [84]

Answer:

The calculated value |Z| = |-2.5| >2.326 at 0.05 level of significance

The alternative hypothesis is accepted at a 0.05 level of significance

The manager of Publix in Clemson believes 64% is too high for his own store

Step-by-step explanation:

Step:-1

Given that the consumer Reports showed that 64% of supermarket shoppers.

Given that the population proportion

P = 0.64

Given that random sample size 'n' = 100

Given that 52 believe the supermarket brands were as good as the national brands.

sample proportion

$p^{-} = \frac{x}{n} = \frac{52}{100} = 0.52$

Step:-2

Null hypothesis: The manager of the Publix in Clemson believes 64% is too low for his own store

μ < 0.64

Alternative Hypothesis:H₁:μ > 0.64

Test statistic

$Z = \frac{p-P}{\sqrt{\frac{PQ}{n} } }$

$Z = \frac{0.52-0.64}{\sqrt{\frac{0.64 X 0.36}{100} } }$

Z = -2.5

Level of significance = 0.05

Z₀.₀₅ = 2.326

The calculated value |Z| = |-2.5| >2.326 at 0.05 level of significance

Final answer:-

The null hypothesis is rejected at a 0.05 level of significance

The alternative hypothesis is accepted at a 0.05 level of significance

3 0

2 years ago

Determine whether the question

KiRa [710]

"How much did your classmates typically spend on music downloads last year?" is a statistical question, and the units would be both the number of students and how many downloads each individual bought.

4 0

2 years ago

a coin is tossed and a number cube is rolled what is the probability that the coin shows heads and the number cube shows 5

Reptile [31]

Answer:

If it is a 6 sided dice, then the probability will be roughly a 1 in 12 chance

Step-by-step explanation:

I think, not entirely sure, sorry if it is wrong

8 0

2 years ago

Which statements describe a parabola? Check all that apply. A parabola is the set of all points equidistant from the directrix a

katen-ka-za [31]

Answer:

A parabola is the set of all points equidistant from the directrix and focus.

The line of symmetry intersects the focus and directrix

The line of symmetry and the directrix are perpendicular

Step-by-step explanation:

A parabola is the set of all points in a plane that are equidistant from a fixed point (focus) and a line (directrix).

The fixed line of a parabola is known as the directrix of the parabola.

The line of symmetry is a line that passes through the focus and is perpendicular to the directrix. The line of symmetry divides the parabola.

The directrix of a parabola does not intersect touch the parabola

8 0

2 years ago

Read 2 more answers

A case of Mountain Dew (24 cans) cost $7.68. What is the unit price?

Westkost [7]

0.32 cents for each unit because if you divide 7.68 by 24 it is 0.32

3 0

3 years ago

Read 2 more answers

What is the answer?please ​

What is the answer?please