## What is the critical value of 89% confidence level?

## What is the critical value of 89% confidence level?

Confidence level, c=0.89.

**What is za 2 for a 95% confidence interval of the population mean?**

Confidence (1–α) g 100% | Significance α | Critical Value Zα/2 |
---|---|---|

90% | 0.10 | 1.645 |

95% | 0.05 | 1.960 |

98% | 0.02 | 2.326 |

99% | 0.01 | 2.576 |

### What is the critical value for 88 confidence interval?

Answer and Explanation: A 88% confidence interval corresponds to α=0.12 .

**How do you find a za 2 confidence interval?**

Alpha levels are related to confidence levels: to find alpha, just subtract the confidence interval from 100%. for example, the alpha level for a 90% confidence level is 100% – 90% = 10%. To find alpha/2, divide the alpha level by 2. For example, if you have a 10% alpha level then alpha/2 is 5%.

## What is the z-score for a 90 confidence interval?

1.645

Step #5: Find the Z value for the selected confidence interval.

Confidence Interval | Z |
---|---|

85% | 1.440 |

90% | 1.645 |

95% | 1.960 |

99% | 2.576 |

**What is Z for 80 confidence interval?**

1.28 a

The value is determined by the confidence level you have chosen. For example, the z* value for an 80% confidence level is 1.28 and the z* value for a 99% confidence level is 2.58. The standard error is the standard deviation OF THE STATISTIC.

### What is the critical value for a 90% confidence interval?

z=1.645

The area is at z=1.645. This is your critical value for a confidence level of 90%.

**What is the z-score of 88?**

Percentile | z-Score |
---|---|

87 | 1.126 |

88 | 1.175 |

89 | 1.227 |

90 | 1.282 |

## What is the z-score for 87 confidence interval?

Explanation: The confidence interval is 87%. It is the same as 0.87.